•* ' - ' 1 / y . >'•+ \ .t : ■ ■ ' ’ £i$ S ^lt% 4 K EnCTCLOPjEDIA Britannica; D I C T I O NARY O F ARTS, SCIENCES, AND MISCELLANEOUS LITERATURE; Conflrudfted on a Plan, BY WHICH THE DIFFERENT SCIENCES AND ARTS Are digefted into the Form of Diftindl TREATISES or SYSTEMS, COMPREHENDING The History, Theory, and Practice, of each, according to the Lateft Difcoveries and Improvements; and full EXPLANATIONS gif-fn of the VARIOUS DETACHED PARTS OF KNOWLEDGE, WHETHER RELATING TO Natural and Artificial Obje&s, or to Matters Ecclesiastical, Civil, Military, Commercial, &c. Including Elucidations of the moft important Topics relative to Religion, Morals* Manners, and the Oeconomy of Life : A Description of all the Countries, Cities, principal Mountains, Seas, Rivers, 6c. throughout the World; A General History, Ancient and Moderny of the different Empires, Kingdoms, and States; , An Account of the Livcs of the moft Eminent Perfons in every Nation, from the earlieft ages down to the prefent times^ Compile i Jrom the uritings of the keji Authors, in feveral languishes; the mojl approved DiSionaries, as well of general fciencc ns of its parti', culor branches; the Trnnjahtions, Journals, and Memoirs,of learned Societies, both at home and abroad : the MS. LeClures of Eminent Profejpsrs on different fciences ; and a variety of Original Materials, furnijhed by an. Extenfive- Correfpondence. THE THIRD EDITION, lIf EIGHTEEN VOLUMES, GREATLY IMPROVED. ILLUSTRATED WITH FIVE HUNDRED AND FORTY-TWO COPPERPLATES. VOL. IX. INDOCTI OlSCfttf, ET AMENT MEMINtSSK FERITl. EDINBURGH. PRINTED FOR A. BELL AND C. MACFARC^U HAR, MOCCXCVII. . OEntereti in Stationer# in Cermg of tfje Hft of j^arliamentf Encyclopedia B ritannica. HYDROSTATICS; A SCIENCE which treats of the weight, modgn, and equilibria of liquid bodies. Under this h&d, not only accounts of the nature and properties of fluids in general are introduced, and the laws by which they aft ; but alfo the art of weighing folid bodies in fluids, in order to difcover their fpecific gravities. Sect. I. Fluids in general. Fluid de- S1R Ifaac Newton’s definition of a fluid is, That it is Sntd, &c. a body yielding to any force impreffed, and which hath its parts very eafily moved one among another. See Fluidity. This definition fuppofes the motion fpoken of pro¬ duced by a partial preffure ; for in the cafe of an in- compreffible fluid, it is demonftrated by Dr Keil, that under a total or an equal preflure, it would be impof- fible that the yielding body (hould move. The original and conftituent parts of fluids are by the moderns conceived to be particles fmall, fmooth, hard, and fpherical: according to which opinion, everjr particle is of itfelf a folid or a fixed body ; and, when confidered fingly, is no fluid, but becomes fo only by being joined with other particles of the fame kind. From this definition, it hath been concluded by fome philpfophers, that fome fubftances, fuch as mercury, are eflentially fluid, on account of the par- ticular'configuration of their particles ; but later dif- coveries have evinced the fallacy of this opinion, and that fluidity is truly to be reckoned an effeft of heat. See Fluidity. That fluids have vacuities, will appear upon mixing fait with water, a certain quantity whereof will be diflblved, and thereby imbibed, without enlarging the dimenfions. A fluid’s becoming more buoyant, is a certain proof that its fpecific gravity is iucreafed, and of confequence that many of its vacuities are thereby filled: after which it may ftill receive a certain quan¬ tity of other dilfoluble bodies, the particles whereof are adapted to the vacancies remaining, without adding any thing to its bulk, though the abfolute^veight of the whole fluid be thereby increafed. This might be demonflrated, by weighing a phial of rain-water critically, with a nice balance: pour this water into a cup, and add fait to it; refund of the clear liquor what will again fill the phial; an in- creafe of weight will be found Under the fame dimen¬ fions, from a repletion, as has been faid, of the vacuities of the frefli water with faline particles. Vol. IX. Part I, And as fluids have vacuities, or are not perfeftly denfe ; it is alfo probable, that they are compounded of fmall fpheres of different diameters, whole inter- ftices may be fucceffively filled with apt materials for that purpofe : and the fmaller thefe interftices are, the greater will the gravity of the fluid always be. For inftance, fuppofe a barrel be filled with bulleta in the molt compaft manner, a great many fmall-fhot may afterwards be placed in the inter dices of thofe balls, the vacuities of the fhot may then be replenifhed with a certain quantity of fea-fand ; the interdices of the grains of the fand may again be filled with water; and thus may the weight of the barrel be greatly augmented, without increafing the general bulk.— ® Now this being true with, regard to folids, is appli- ’“(inaJ“r° cable alfo to fluids. For indance, river-water will perties?' diffolve a certain quantity of fait; after which it will V receive a certain quantity of fugar; and after that, a certain quantity of alum, and perhaps other diflbluble bodies, and hot increafe its firfl dimenfions. _ The more perfeft a fluid is, the more eafily will it yield to all impreffions, and the more eafily will the parts unite and coalefce when feparated. A perfeft fluid is that whofe parts are pfit into motion by the kaji force imaginable : an imperfeft one is that whofe parts yield to a fmall force, not the leaf. It is pro¬ bable, that in nature there is no perfeft fluid, the ele¬ ment of fire perhaps excepted ; fince we fee that the mutual attraftion of the parts of all the fluids, fubjeft to our experiments, renders them cohefive in fome de¬ gree ; and the more they cling together, the lefs per¬ feft their fluidity is. If, for indance, a glafs be filled with water above the brim, it will vifibly rife to a convex furface, which, was it a perfeft fluid, free from either tenacity or cohefion, would be impoffible. Mercury, the mod perfeft fluid we know, is not exempt from this attraftion ; for fliould the bottom of a flat glafs, having a gentle rifing toward the mid¬ dle, be covered thin with quickfilver, a little motion of the machine will caufe the fluid foon to feparate from the middle, and lie round it like a ring, having edges of a confiderable thicknefs. But if a like quantity thereof be poured into a gol¬ den cup, it will, on the contrary, appear higher con- fiderably on the fides than in the middle. Which may proceed in part, perhaps, from the gold’s being of great denfity, and therefore capable of exerting there¬ on a greater degree of attraftion than other metals. Probably too it may happen from its having pores of 2 HYDROS PreHcre »f an apter difpolition and magnitude to receive the mi- , Flmds. ^ nute mercurial particles, than thofe of iron and fome v other metals ; and therefore the attraftion of cohefion in this experiment may obtain alfo : and every one knows how eafdy thefe two bodies incorporate, and make a perfect amalgama. But the reafon commonly given for the two phenomena is, tha?*mercury, in the firft cafe, attra&s itfelf more than it does glafs; and, in the laft cafe, mercury attrafts gold more than it does itfelf. Sir Ifaac Newton held all matter to be originally homogeneous; and that from the different modifica¬ tions and texture of it alone, all bodies receive their various ftrufture, compofition, and form. In his defi-1 nition of a fluid, he feems to irhply, that he thought fluids to be compofed of primary folids ; and, in the beginning of his Princlpia, he, fpeaks of fand and pow¬ ders as of imperfect fluids. Borelli has demonftrated, that the conftituent parts of fluids are not fluid, but confident bodies ; and that 3 the elements of all bodies are perfectly firm and hard. Florentine The incompreffibility of water, proved by the Flo- «xpenment.rent;ne eXperjment, is a fuffieient evidence alfo, that each primary particle or fpherule thereof is a perfect and impenetrable folid. Mr Locke too, in his EJfay on Human Underjlanding, admits this to be fo. This famous experiment was firft attempted by the great lord Verulam, who inclofed a quantity of water in lead, and found that it inclined rather to make its way through the pores of the metal, than be reduced into lefs compafs by any force that could be applied. The academics of Florence made this experiment af¬ terwards more accurately with a globe of filver, as being a metal .lefs yielding and duftile than gold. This being filled with water, and well clofed, they found, by hammering gently thereon, that the fpheri- city of the globe was altered to a lefs capacious fi¬ gure (as might geometrically be proved); but a part of the water always like dew came through its lides before this could be obtained. This has been attempted by Sir Ifaac Newton, and fo many competent judges, on gold and feveral other metals iince, with equal fuc; cefs, that we do not hold any fluid in its natural ftate, except the air, to be either comprefiible or elaflic.— In fome experiments by Mr Canton, it hath been ob- ferved, that water is more or lefs compreffed accord¬ ing to the different conftitution of the atmofphere ; whence it hath been concluded that the Florentine experiment Was erroneous: but it will not follow, that water can be compreffed by any artificial force, be- caufe nature hath a method of compreffing it; any more than that folid metal can be compreffed artifi¬ cially, though we know that very flight degrees of heat and cold will expand or contrail its dimenfions. See Water. Sect. II. Of the Gravity and Preffure of Fluids. FUlidfprefs All bodies, both fluid and folid, prefs downwards a* much by the force of gravity : but fluids have this wonder- upward as ful property, that their preflure upwards and fidewife Uuwnvvard, js eqllal to their preflure downwards; and this is al¬ ways in proportion to their perpendicular height,with¬ out any regard to their quantity: for, as each par¬ ticle is quite free to move, it will move towards that T A T I C S. Sea. II. part or fide in which the preffure is leaf!;. And hence, Preffure of no particle or quantity of a fluid can be at reft till it is Flu5df- every way equally preffed. To fhow by experiment that fluids prefs upward as Piate well as downward, let AB be a long upright tube ccxxxix. filled with water near to its top; and CD a fmall tube open at both ends, and immerfed into the water in the large one : if the immeriion be quick, you wii! fee the water rife in the fmall cube to the fame height that it ftands in the great one, or until the furfaces of the water in both are on the fame level : which fhows that the water is prefled upward into the fmall tube by the weight of what is in the great one ; other- wife it could never rife therein, contrary to its natural gravity, unlefs the diameter of the bore were fo fmall, that the attraftion of the tube would raife the water; which will never happen, if the tube be as wide as that in a common barometer. And, as the water rifes no higher in the fmall tube than till its , furface be on a level with the furface of the water in the great one, this ihows that the preflure is not in proportion to the quantity of water in the great tube, but in proportion to its perpendicular height therein for there is much more water in the great tube all around the fmall one, than what is raifed to the fame height in the fmall one as it ftands in the great. Take out the fmall tube, and let the water run out of it; then it will be filled with air. Stop its upper end with the cork C, and it will be full of air all be¬ low the cork: this done, plunge it again to the bot¬ tom of the water in the great tube, and you Will fee the water rife up in it to the height E. Which fliows that the air is a body, otherwife it could not hinder the water from riling up to the fame height as it did before, namely, to A ; and in fo doing, it drove the air out at the top ; but now the air is confined by the cork C: And it alfo Ihows that the air is a comprefiible body; for if it were not fo, a drop of water could not enter into the tube. The pieflure of fluids being equal in all dire&ions, it follows, that the fidesof a veffel are as much prefied by a fluid in it, all around in any given ring of points,, as the fluid below that ring is preffed by the weight of all that ftands above it. Hence the preffure upon every point in the lides, immediately above the bottom, is equal to the preffure upon every point of the bottom. —To (how this by experiment, let a hole be made at e Fig. 3. in the fide of the tube AB clofe by the bottom, and another hole of the fame fize in the bottom at C ; then pour your water into the tube, keeping it full as long as you choofe the holes Ihould run, and have two bafons ready to receive the water that runs through the two holes, until you think there is enough in each bafon ; and you will find by meafuring the quan¬ tities, that they are equal. Which fhows that the wa¬ ter run with equal fpeed through both holes; which it could not have done, if it had not been equally preffed fhrough them both. For, if a hole of the fame fize be made in the fide of the tube, as about/,, and if all three are permitted to run together, you will find that the quantity run through the hole at f is much lefs than what has run in the fame time through either of the holes C or e. In the fame figure, let the tube be re curved from the bottom at C into the fhape DE, and the hole at C Sea.n. H Y D R O S Preffure of C be Ilopt with a cork. Then pour water into the Fluid?. tutjC t0 any height, as Ag, and it will fpout up in a jet EFG, nearly as high as it is kept in the tube AB, by continuing to pour in as much there as runs through the hole E ; which will be the cafe whilft the furface A g keeps at the fame height. And if a little ball of cork G be laid upon the top of the jet, it will be fup- ported thereby, and dance upon it. The reafon why the jet rifes not quite fo high as the furface of the water A^, is owing to the refiftance it meets with in the open air : for if a tube, either great or fmall, was fcrewed upon the pipe at E, the water would rife in it Until the furfaces of the water in both tubes were on the fame level; as will be Ihown by the next expe¬ riment. The hydro- Any quantity of a fluid, how fmall foever, may be flatic para- made to balance and fupport any quantity, how great dox. foever. This is defervedly termed the hydrojlatical paradox ; which we (hall firft (how by an experiment, and then account for it upon the principle above men¬ tioned, namely, that the prejfure of fluids is direSly as their perpendicular height, without any regard to their quantity. plate Let a fmall glafs tube DCG, open at both ends, ccxxx?x. and bended at B, be joined to the end of a great one 4' AI at cd, where the great one is alfo open ; fo that thefe tubes in their openings may freely communicate with each other. Then pour water through a fmali necked funnel into the fmall tube at H ; this water will run through the joining of the tubes at cd, and rife up into the great tube; and if you continue pour¬ ing until the furface of the water comes to any part, as A, in the great tube, and then leave off, you will fee that the furface of the water in the fmall tube will be juft as high at D ; fo that the perpendicular altitude of the water will be the fame in both tubes, however fmall the one be in proportion to the other. This (hows, that the fmall column DCG balances and fup- ports the great column A«/; which it could not do if their prelfures were not equal againft one another in the recurved bottom at B.—If the fmall tube be made longer, and inclined in the fituation GEF, the furface of the water in it will ftand at F, on the fame level with the furface A in the great tube : that is, the water will have the fame perpendicular height in both tubes, although the column in the fmall tube is longer than that in the great one; the former being oblique, and the latter perpendicular. Since then the preffure of fluids is dire&ly as their perpendicular heights, without any regard to their quantities, it appears, that whatever the figure or fize of veffels be, if they are of equal heights, and if the areas of their bottoms are equal, the preffures of equal heights of water are equal upon the bottoms of thefe veffels; even though the one fhould hold a thoufand or ten thoufand times as much water as would fill the other. To confirm this part of the hydroftatical pa¬ radox by an experiment, let two veffels be prepared of equal heights, but very unequal contents, fuch as AB fig. 5. and AB in fig. 6. Let each veffel be open at both ends, and their bottoms D D d. Or, if the tube be raifed a little in the water, the lead will fall by its own weight, which will then be too great for the prefiTure of the water around the tube up¬ on the column of water below it._ But the following method of making an extremely heavy body float upon water is more elegant. Take a long glafs tube, open at both ends; flopping the lower end with a finger, pour in fome quickfilver at the other end, fo as to take up about half an inch in the tube below. Immerfe this tube, with the finger ftill at the bottom, in a deep glafs veflel filled with water; and when the lower end of the tube is about feven inches below the furface, take away the finger from it, and then you will fee the quickfilver not fink into the veflel, but remain fufpend- ed upon the tube, and floating, if we may fo exprefs it, upon the water in the glafs-veffel. jis In the fame manner as an heavy body was made to fwim on water, by taking away the upward preflure j wood "may fo may a light body, like wood, be made to remain be made to funk at the bottom, by depriving it of all preffure from below : for if two equal pieces of wood be planed, ° furface to furface, fo that no water can get between them, and then one of them (c d) be cemented to the infide of the vefiel’s bottom; then the other being placed Upon this, and, while the veflel is filling, being kept down by a flick ; when the flick is removed and the veflel full, the upper piece of wood will not rife from the lower one, but continue funk under water, though it is actually much lighter than water ; for as there is no refiftance to its under furface to drive it up¬ ward, while its upper furface is ftrongly prefled downy it muft neceffarily remain at the bottom. Sect. III. H YI3 It O S T^A_T IC S. Plate C CXXXDL. Sea. III. HYDROS Specific Gravities.1 Sect. III. Of the Specific Gravity of Bodies. Of fpccific When an unfpongy or folid body finks in a veflel of gravity. water, it removes a body of water equal to its own bulk, out of the place to which it defcends. If, for inftance, a copper ball is let drop into a glafs of water, we well know, that if it finks, it will take up as much room as a globe of water equal to itfelf in fize took up before. Let us fuppofe, that this watery globe removed by the ball were frozen into a folid fubftance, and weigh¬ ed in a fcale againll the copper ball: now the copper ball being more in weight than the globe, it is evi¬ dent that it will fink its own fcale, and drive up the oppofite, as all heavier bodies do when weighed againft lighter ;■ if, on the contrary, the copper ball be lighter than the water globe, the ball will- rife. Again, then let us fuppofe the copper ball going to be immerfed in water ; and that, in order to defcend, it muft difplace a globe of water equal to itfelf in bulk. If the copper ball be heavier than the globe, its preffure will over¬ come the other’s refiftance, and it will fink to the bot¬ tom ; but if the watery globe be heavier, its prelfure upwards will be greater than that of the ball down¬ ward, and the ball will rife or fwim. In a word, in proportion as the-ball is heavier than the fimilar bulk of water, it will defcend with greater force ; in pro¬ portion as it is lighter, it will be raifed more to the furface. From all this we may deduce one general rule, which will meafure the force -with which any folid body tends to fwim or fink in water; namely. Every lody immerfed in water, lofes jujl as much of its weight as equals the weight of an equal hulk of water. Thus, for inftance, if the body be two ounces, and an equal bulk of water be one ounce, the body when plunged, will fink towards the bottom of the water with a weight of one ounce. If, on the contrary, the folid body be but one ounce, and the weight of an equal bulk of water be two ounces; the folid, when plunged, will remove but one ounce, that is half as much water as is equal to its own bulk: fo that, confequently, it can¬ not defcend; for to do that, it muft remove a quanti¬ ty of water equal to its own bulk. Again, if the fo¬ lid be too ounces, and the equal bulk of water two ounces, the folid, wherever it is plunged, will nei¬ ther rife nor fink, but remain fufpended at any depth. Thus we fee the reafoo why fome bodies fwim in water, and others fink. Bodies of large bulk and little weight, like cork or feathers, muft. neceftarily fwim, be- caufe an equal bulk of water is heavier than they ; bo¬ dies of little bulk but great weight, like lead or gold, muft fink, becaufe they are heavier than an equal bulk of water. The bulk and the weight of any body con- fidered together, is called its fpecifc gravity ; and the proportion of both in any body is eafily found by wa¬ ter. A body of little bulk and great weight, readily finks in water, and it is faid to have fpecific gravity ; a body of great bulk and little weight, lofes almoft all its weight in water, and therefore is faid to have but little fpecific gravity. A woolpack has adlually greater real gravity, or weighs more in air, than a cannon ball; but for all that, a cannon ball may have more fpecific gra¬ vity, and weigh more than the woolpack, in water. T a t i c s. Denfity is a general term that me^ns the fame thing ; Specific fpecific gravity is only a relative term, ufed when folids i Qravides^ are weighed in fluids, or fluids in fluids. ' " v As every folid finks more readily in water, in pro¬ portion as its fpecific gravity is great, or as it con¬ tains greater weight under a fmaller bulk, it will fol¬ low, that the fame body may very often have different fpecific gravities, and that it will fink at one time and fwim at another. Thus a man, when he happens to fall alive into the water, Jinks to the bottom ; for the fpecific gravity of his body is then greater than that of water : but if, by being drowned, he lies at the bottom for fome days, his body fwells by putrefaftion, which difunites its parts ; thus its fpecific gravity be¬ comes lefs than that of water, and he floats upon the furface. lT Several more important ufes are the refult of our How to dif. being able exa&ly to determine the fpecific gravities covef at}uI~ of bodies. We can, by weighing metals in water, ‘a difcover their adulterations or mixtures with greater exadtnefs than by any other means whatfoever. By this means, the counterfeit coin, which may be offer¬ ed us as gold, will be very eafily diftinguifhed, and known to be a bafer metal. For inllance, if we are offered a brafs counter for a guinea, and we fufpedf it; fuppofe, to clear our fufpicions, we weigh it in the ufual manner againft a real guinea in the oppofite fcale, and it is of the exaft; weight, yet ftill we fufpedf it; What is to be done ? To melt or deftroy the figure of the coin would be inconvenient and improper : a much better and more accurate method remains. We have only to weigh a real guinea in water, and we fliall thus find that it lofes but a nineteenth part of its weight in the balance: We then weigh the brafs coun¬ ter in water, and we adtually find it lofes an eighth part of its weight by being weighed in this manner. This at once demonftrates, that the coin is made of a bafe metal, and not gold ; for as gold is the heavieft of all metals, it will lofe lefs of its weight' 6y being weigh¬ ed in water than any other. This method Archimedes firft made ufe of fo detedb a fraud with regard to the crown of Hiero king of Sy- racufe. Hiero had employed a goldfmith to make him a crown, andvfurniftied him with a certain weight of gold for that purpofe; the crown was made, the weight was the fame as before, but ftill the king fuf- pedfed that there was an adulteration in the metal. Archimedes was. applied to ; who, as the ftory goes, was for fome time unable to detedk the impofnion. It happened, however, one day as the philofopher was ftepping into a bath, that he took notice the water rofe in the-bath in proportion to the part of his body immerfed. From this accident he received a hint ; wherewith he was fo tranfported, that he jumped out of the bath, and ran naked about the ftreets of Syra- cufe, crying in a wild manner, I have found it ! I have found it l—In confequence of this fpeeulation, he pro¬ cured a ball of gold and another of filvev, exactly of the weight of the crown, confidering, that if the crown were altogether of gold, the ball of gold would be of the fame bulk as the crown, and when immerfed in water, would raife the water juft as high as the crown immerfed ; but if it were wholly of filver, the ball of filver being immerfed, would raife the water no higher than the crown immerfed j and if the crown was of gold HYDROS Specific gold and filver mixed in a certain proportion, this pro- ^Gravitiec. ^ port;on WOuld be difcovered by the height to which the crown would raife the water higher than the gold and lower than the filver. Accordingly, let AMLB be a vefftd filled with water to the height D C, >nd let the mafs of gold, equal in weight to the crown, on being immerfed into the water, raife the furface of it to E, and the mafs of filver raife it to G; then if the height of the veffel above D C be divided into equal parts, and D F= 11, and D G = 19, it is plain the bulks of gold and filver will be as D F to D G, and the fpecific gravities in the inverfe proportion of thefe quantities, or as D G to D F. If the crown be im¬ merfed, it will raife the furface of water to E ; whence the proportion of the bulks of the gold and filver in the crown may be determined. For fince the differ¬ ence of the fpecific gravities of the gold and filver is DG—DF=FG=8, if the bulk of the crown is divided into eight equal parts, it is evident, that fince. the fpecific gravities of the debafed and pure gold ■crowns will be as the bulks invetfely, that is, as DF to DE, we can eafily find the point H, which willexprefs the fpecific gravity of the former; forDE: DF:: DG: DH. This point H always divides the difference FG into two parts GH, HE, which have the fame propor¬ tion as the parts of filver in the crown to the parts of gold ; for as the point E afcends, the point H defcends, and when E coincides with G, H falls upon E, and the crown becomes wholly filver ; on the contrary, when E defcends to F, and H afcends to G, the crown becomes wholly gold; therefore FH will be every where to HG as the parts of gold to the parts of filver in the crown. Confequently, in the prefent cafe, becaufe the crown, when immerfed, raifes the water to the heightDE, and H is three divifiotis below G, it fhows that three of the eight parts of the crown are filver, and the other five parts gold, as H is five of the divifions above F. Hence the bulk of the gold in the crown is to that of the filver as 5 to 3. In fome fuch method as this Archimedes de¬ duced his propofition, viz. that the difference of the fpe¬ cific gravities of the compound and lighter ingredient, i. e. 5 (fuppofing the fpecific gravity of gold to filver as 19 to 11, and the fpecific gravity of the king’s crown to be 16), is to the difference of the fpecific gravities of the heavier ingredient and the compound, i. e. 3, as the bulk of gold to that of filver made up of: fo that if the whole crown were divided into eight parts, the gold would confift of five, and the filver of three 5 and the magnitudes 5 and 3, multiplied by the fpecific gra¬ vities 19 and 11 refpeftively, will give the numbers 95 and 33, expreffing the proportion of the weight of the gold to that of the filver. This propofition of Archimedes may be demonflra- ted analytically in the following manner: let the magnitudes of the gold and filver in the crown be A and B, and their fpecific gravities as a and b; then, fince the abfolute gravity of any body is compounded of its magnitude and fpecific gravity, the weight of the gold is a A, of the filver b B, and of the crown o A-f£B = cXA4-B, fuppofing c to be the fpecific gravity of the mixture. Hence aA—cA=rrB—£B ; and confequently c—b : a—c: : A : B, as before. T A T I C S. Sea. III. Upon this difference in the weight of bodies in open Specific air and water, the hydroftatic balance has been form- gravities. ^ ed; which differs very little from a common balance, ^ but that it hath an hook at the bottom of one fcale, The hydro- on which the weight we want to try may be hung by ftatic ba- an horfe-hair, and thus fufpended in water, withoutlance* wetting the fcale from whence it hangs. Firft, the weight of the body we want to try is balanced againft the parcel or weight in open air; then the body is fufpended by the hook and horfe-hair at the bottom of the fcale in water, which we well know will make it lighter, and deftroy the balance. We then can know how much lighter it will be, by the quantity of the weights we take from the fcale to make it equipoife ; and of confequence we thus precifely can find out its fpecific gravity compared to water (A).This is the moft exaft and infallible method of knowing the genuine- nefs of metals, and the different mixtures with which they may be adulterated, and it will anfwer for all fuch bodies as can be weighed in water. As for thofe things that cannot be thus weighed, fuch as quick- filver, fmall fparks of diamond, and fuch like, as they cannot be fufpended by an horfe-hair, they muff be put into a glafs-bucket, the weight of which is already known: this, with the quickfilver, muff be balanced by weights in the oppofite fcale, as before, then immer¬ fed, and the quantity of weights to be taken from the oppofite fcale will fhow the fpecific gravity of the buc¬ ket and the quickfilver together: the fpecific gravity of the bucket is already known; and of confequence the fpecific gravity of the quickfilver, or any other fi- milar fubftance, will be what remains. As we can thus difcover the fpecific gravity of dif¬ ferent folids by plunging them in the fame fluid, fo we can difcover the fpecific gravity of different fluids, by plunging the fame folid body into them ; for in pro¬ portion as the fluid is light, fo much will it diminilh the weight of the body weighed in it. Thus we may know that fpirit of wine has lefs fpecific gravity than water, becaufe a folid that will fwim in water will fink in fpirit; on the contrary, we may know that fpirit of nitre has greater fpecific gravity than water, becaufe a folid that will fink in water will fwim upon the fpirit of nitre. Upon this principle is made that fimple in- I3 ftrument called an hydrometer, which ferves to meafure The hydro- the lightnefs or weight of different fluids. For thatmeter* liquors weigh very differently from each other is found by experience. Suppofe we take a glafs-veffel which is divided into two parts, communicating with each ' other by a fmall opening of a line and an half diame¬ ter. Let the lower part be filled up to the divifion with red-wine, then let the upper part be filled with water. As the red-wine is lighter than water, we ffiall fee it in a fliort time riling like a fmall thread up through the water, and diffufing itfelf upon the fur¬ face, till at length we lhall find the wine and water have changed their places ; the water will be feen in the lower half, and the wine in the upper half, of the vef¬ fel. Or take a fmall bottle AB, the neck of which muff be very narrow, the mouth pot more than £ of qqxL an inch wide; and have a glafs-veffel CD, whofe fig.*, height exceeds that of the bottle about two inches. 1 With (a) This is the common hydroftatic balance. The reader will fee.an improved apparatus at Hydrojlatk Balance, in order of the alphabet. sea. III. HYDRO Specific With a fmall funnel fill the bottle quite full of red- Gravities^ wine, and place it in the veffel CD, which is to be 1 v ' full of water. The wine will prefently come out of the bottle, and rife in form of a fmall column to the furface of the water; and at the fame time the wa¬ ter, entering the bottle, will fupply the place of the wine; for water being fpecifically heavier than wine, muft hold the loweft place, while the other naturally rifes to the top. A fimilar effeft will be produced if the bottle be filled with water, and the veifel with wine : for the bottle being placed in the veffel in an inverted pofition, the water will defcend to the bottom of the vefiel, and the wine will mount into the bottle. In the fame manner we may pour four different li¬ quors, of different weights, into any glafs-veffel, and they (hall all Hand feparate and unmixed with each other. Thus, if we take mercury, oil of tartar, fpi- rit of witie, and fpirit of turpentine, fhake them toge¬ ther in a glafs, and then 1ft them fettle a few minutes, each fhall Hand in its proper place, mercury at the bottom, oil of tartar next, fpirit of wine, and then fpirit of turpentine above all. Thus we fee liquors are of very different denfities; and this difference it is that the hydrometer is adapted to compare. In ge¬ neral, all vinous fpirits are lighter than water; and the lefs they contain of water, the lighter they are. The hydrometer, therefore, will inform us how far they are genuine, by fhowing us their lightnefs ; for in pure ’fpirit of wine it finks lefs than in that which is mixed with a fmall quantity of water. The hydrometer fhould be made of copper: for ivory BiS- 3- imbibes fpirituous liquors, and thereby alters their gra¬ vity ; and glafs requires an attention that is incompatible with expedition. The moft fimple hydrometer con- fiils of a copper ball B 5, to which is foldered a brafs wire AB, one quarter of an inch thick. The upper part of this wire being filed flat, is marked proof, at m, fig. 4. becaufe it finks exaftly to that mark in proof-fpirits. There are two other marks at A and B, fig. 3. to fhow whether the liquor be one-tenth above or- below proof, according as the hydrometer finks to A, or emerges to B, when a brafs weight, as C or K, is- fcrewed to its bottom c. There are other weights to fcrew on, which fhow the fpecific gravity of differ¬ ent fluids, quite down to conunon water. The round part of the wire above the ball may be marked fo as to reprefent river-water when, it links to RW, fig. 4. the weight which anfwers to that water being then fcrewed on; and when put'into fpring- water, mineral-water, fea-w^ater, and water of fait fprings, it will gradually rife to the marks SP, MI, SE, SA. On the contrary, when it is put into Bri- ftol water, rain-water, port-wine, and mountain-wine, it will fucceffively fink to the marks br, ra, po, mo. Inftruments of this kind are fometimes called areometers. There is another fort of hydrometer that is calcu¬ lated to afeertain the fpecific gravity of fluids to the greateil precifion poffible, and which confifts of a large hollow ball B, fig. 5. with a fmaller ball b fcrew¬ ed on to its bottom, partly filled with mercury or fmall fhot, in order to render it but little fpecifically lighter than water. The larger ball has alfo a fhort neck at C, into which is fcrewed the graduated brafs-wire AC, which, by a fmall weight at A, caufes the body of the inftrument to defcend in the fluid, with part of the ftem. STATICS. 7 When this inftrument is fwimming in the liquor Specific contained in the jar ILMK, the part of the fluid dif- Gr'i^lKa^ placed by it will be equal in bulk to the part of the inflrument under water, and equal in weight to the whole inftrument. Now, fuppofe the weight of the whole to be four thoufand grains, it is then evident we can by this means compare the different dimenfions of four thoufand grains of feveral forts of fluids. For if the weight at A be fuch as will caufe the ball to fink in rain-water till its furface come to the middle point of the ftem 20 ; and after that, if it be immerfed in common fpring-water, and the furTace be obferved to ftand at one-tenth of an inch below the middle point 20; it is apparent, that the fame weight of each water differs only in bulk by the magnitude of one-tenth of an inch in the ftem. Now, fuppofe the ftem to be ten inches long, and to weigh a hundred grains, then every tenth of an inch will weigh one grain: and as . the ftem is of brafs, which is about eight times heavier than water, the fame bulk of water will be equal to one-eighth of a grain, and confequently to the one-eighth of one four- thoufandth part, that is, one thirty-two thoufandth part of the whole bulk. This inftrument is capable of ftill greater precifion, by making the ftem or neck, confift of a flat thin flip of brafs, inftead of one that is cylindrical: for bv this means we increafe the fur¬ face, which is the moft requifite circumftance, and di- minifh the folidity, which neceffarily renders the in¬ ftrument ftill more accurate. To adapt this inftrument to all purpofes, there fhould be two ftems, to fcrew on and off, in a fmall hole at a. One ftem fhould be a fmooth thin flip of brafs, or rather fteel, like a watch-fpring fet ftraight, fimilar to that we have juft now mentioned ; on one fide of which is to be the feveral marks or divifions to which it. will fink in different forts of water, as rain, river, fpring, fea, and falt-fpring waters, &c.; and on the other fide you may mark the divifions to which it finks in various lighter fluids, as hot Bath water,- Briftol water, Lincomb water, Cheltenham water, port-wine, mountain, madeira, and other forts of wines. But here the weight at A on the top muft be a little- lefs than before when it was ufed for heavier waters. But in trying the ftrength of the fpirituous liquors, a common cylindric ftem will do beft,. becaufe of its ftrength' and fteadiriefs : and this, ought to be fo con* trived, that, when immerfed in what is called proof- fpirit, the furface of the fpirit may- be upon the middle point 20 ; which is eafily done by duly adjufting the fmall weight A on the top, and making the ftem of fuch a length, that, when immerfed in water, it may juft cover the ball and rife to a; but, when immerfed in pure fpirit, it may rife to the top A. Then, by di¬ viding the upper and lower parts a 20 and A 20, into ten equal parts each, when the inftrument is immerfed into any fort of fpirituous liquor, it will immediately fhow how much it is above or below proof. ( Proof-fpirit confifts of half water and half pure fpi¬ rit, that is, fuch as, when poured on gun powder, and fet on fire, will burn all away ; .and permits the pow¬ der to take fire and flafh, as in open air. But if the fpirit be not fo highly reftified, there will remain fome water, which, will make the powder wet, and un¬ fit to take fire. Proof-fpirit of any kind weighs feven . pounds twelve ounces per gallon- The HYDROSTATICS. Sea, nr. proved hy¬ drometer. Hydrome¬ ter made byjojies. The common method of fhaking the fpirits in a in its horizontal diameter. It has a fquare (lem A D, Specific phial, and railing a head of bubbles, to judge by their on the four lides of which are graduated the different Gravi::iea', manner of riling or breaking whether the fpirit be llrengths of the fpirit. The other three Tides not fhown v "" proof, or near it, is very fallacious. There is no way in this figure are reprefented in fig. 7. with the three fo certain,' and at the fame time fo eafy and expedi- weights belonging to them, marked nJ r. 2. and 3, tious, as this by the hydrometer. correfponding to the fides fimilarly marked at the top. A variety of different conftrudfions of the hydrome- When the inllrument is placed in the fpirit to be tried, ter have recently been made with a particular .view if it finks to the divifions on the item without a of improving the inftrument, fo as to afcertain the weight, the flrength will be fhown on the fide marked flrengths of fpirits, and worts in brewing, in the o on the top; and it will indicate any ftrength from moft eafy and accurate manner. As it would be unne- 74 gallons in the 100, to 47 to the 100 above proof, ceffary to defciibe all of them here, we fhali conclude The fmall figures, as 4 at 66, 34- at 61, 2^ at 48, &c. this fe&ion with defcrijWfons of thofe only which have {how the concentration by mixture above mentioned, been moll approved and are now in general ufe. The Cuf- v/s;. the rate of diminutions that will take place, by i. toms have for a long time adopted an hydrometer of an making a mixture with water, to reduce the fpint at , old conltruftion, by the late Mr Clarke. It differs very thofe ftrengths to proof. If the hydrometer does not little from the one above defcribed (fig. 3. 4.); and has fink to the Item without a weight, it mull be made belonging to it a great variety of weights, which are oc- do fo by applying cither of the three weights requi- eafionally fecured on to the bottom of the Item : This • fite. The fide n° 1. with the weight no 1. (hows the renders the inftrument troublefome and complicated ftrength of fpirits from 4610 13 gallons to the 100 in its ufe, and where difpatch in bufinefs and accuracy above proof, as before. The concentration figures are are wanted, not fo commodious as fuch an inftrument 2, tx, Sic. the ufe as before. The fide n°2. with the fhculd be. weight n° 2. Ihows the remainder of the over-proof to An hydrometer upon a very fimple conftru&ion, proof, the divifion of which is marked P on the inftru- eafy in its application, and fufficiently accurate for the ment, and every gallon in 100 under proof down to common purpofes it is wanted to anfwer, by diftillers 29. The fide n0 3. with its weight, fhows the re- and others concerned in the fale and ftate of fpirits, mainder from 30 gallons in the 100 under proof down is made by Mr Wm. Jones mathematical inftrument to water, marked W, which may be confidered 109 maker in Holborn. It requires only three weights, to in 160. The application of the thermometer (F) difcover the ftrengths of fpirits from alcohol down now appears eafy and expeditious; for as it is immer- to water. This hydrometer, like others, is adjuft- fed in the fpirits with the hydrometer, they both may ed to a temperate ftate of the air, or 60° of the be obferved at one experiment or trial. The fcale of thermometer with Fahrenheit’s fcale; but as an altera- the thermometer is divided into four columns ; two on tion of this temperature very materially affefts the one fide, as fhown in the figure, and two on the other, gravity of fpirits, caufing them by the inftrument to At the top of the columns are marks o. 1^ 2. 3. agree- appear ftronger when the weather is hotter, and the ing with the weights, or no weight, in ufe ; and that contrary, it has been found indifpenfably neceffary column of divifions of the thermometer is to be ob- to place a thermometer in the fpirits previous to the ferved which correfponds with the weights in ufe ; if no xmmerfing of the inftrument, and make a juft allow- weight is ufed, then the column marked o is obferved. ance for the feveral degrees that the mercury may be The divifions of the thermometer commence from the above or below the temperature above mentioned, middle of each .column at the temperate point, which This has been ufually, though inaccurately, eftimated at is marked o : - then for as many divifions as the quick- the rate of one gallon allowance for every three de- filver in the tube appears above o, fo many gallons in grees of the thermometer above or below 6o° ; viz. the 100 muft the fpirit be reckoned weaker; and for every three degrees warmer, reckoning the fpirit one for fo many divifions as the quickfilver may appear gallon in the too weaker than what is fhown by the below o, as many gallons in the 100 muft be reckoned hydrometer ; and for every three degrees colder than ftronger. 6o°, allowing one gallon in the too ftronger. In this Hydrometers of a fimilar conftru&ion, and with no hydrometer, the thermometer is united with the inftru- more weights, Mr Jones makes for difcovering to great ment; and from experiment its divifions are adjufted exadtnefs the different ftrengths or fpecific gravity of to the different degrees above or below the temperate worts in brewing, of different minerals, fea waters. Hate. The concentration is alfo confidered in this &c. For thefe purpofes the thermometer is not uni- inllrument, which is the mutual penetration of ted with the inftrument; but is found to be more ufe- fpirit and water when mixed together; which in ful feparately, and of a larger dimenfion. Notwitldiand-j^, ftrong fpirits is fo confiderable as to caufe a diminu- ing the above hydrometer anfwering the general purpo-Dicas ^4^ tution of 4 gallons in the 100: for example, if to xco fes in an accurate and eafy manner, yet the induftry ofa Aiding gallons of fpirit of wine, found by the inftrument to be feveral ingenious perfons interefted in the fale of fpirits rufe* 66 gallons in the 100 over proof, you add 66 gallons has been exerted to conltruft an inftrument of the of water in order to reduce it to a proof ftate; the mix- greatejl poffible exadlnefs. The effeds of heat and cold ture, inftead of producing 166 gallons, will produce upon different ftrengths of fpirits not being lo uniform \&2 gallons only of proof fpirits, and therefore 4 gal- as generally underftood, and every different degree of ftrength of fpirit between water and alcohol having its peculiar degree of eontradion and dilatation, errors of fome importance muft be found in the hydrometers con- ftruded upon the ufual principle of temperature. With Ions will be loft in the mutual penetration of the par¬ ticles of the water and fpirit. Fig. 6. is a reprefentation of the whole xnftrument, with the thermometer united. Its length A B is a- bout 9-*-'inches ; its ball C, is of the fhape nearly of a view to obviate this defed, Mr Dicas of Liverpool an egg> an(i made of hard biafs, and about ij i nch e onftruded fome years back an hydrometer of the form N° 161. ge- 5ea.HI. HYDRO SjtCifit generally ufed, with 36 weights, which were valued 'Gravities. from 0 to 370, including the diviiions on the ttem ; but w—y—• jjjg improvement confifts folely in an ivory Hiding rule which accompanies the inftrument. In the graduation of this rule, is confidered the different effedis of heat and cold above-mentioned on the fpirits. Every de¬ gree of ftrength included by the hydrometer between o and 370, has the fame feries of numbers placed on the Hiding part of the rule ; oppofite to which, on the fixed rule, are marked the different Hrengths, and which are thus determined by immediate infpe&ion. They proceed on one fide from water to proof, and on the other from proof to alcohol, and divided in fuch a man¬ ner, as to Ihow how many gallons in the 100 the fpi¬ rits are above or below proof. There is alfo a line, containingthe concentration for everydegree of ftrength; and, what is the chief advantage of the rule, at one end of the fide is placed a fcale, containing the degree of heat from 30 to 80 of Fahrenheit’s fcale, with a flower de luce oppofite, as an index, to fix it to the tempera¬ ture of the fpirits. By the affiftance of this Hiding rule, the exaft ftate of the fpirits is corre&ly obtained. A perfect comprehenfion of this rule can only be had by an infpedtion of it, and it always accompanies the hydrometer on fale. Mr Dicas has obtained a patent t8 for his improvement. "Mr Q^jn’s An hydrometer of a more univerfal conftruftion has nuiivedal fjeen ma(]e by Mr Qmn, who for many years has been Wr. accuftomed to conftvu6l hydrometers of various kinds. This hydrometer is made of hard brafs; and therefore not fo liable to be injured as fine copper, of which hy¬ drometers are ufually made : it is conftru&ed fo as to afcertain, in a plain and expeditious manner, the ftrength of any fpirit from alcohol to water, with the concen¬ tration and fpecific gravity of each different ftrength ; and difcovers alfo the weight of worts, &c. with four weights only ; which, according to the old conftrudtion of hydrometers, would require a far greater number of weights. Fig. 8. is a reprefentation of the inftrument, with its four fides of the Item graduated and figured at top, to correfpond with the weights below. The fide of the fquare-ftem engraved A,B,C, D, &c. to Z, fiiows the ftrength of any fpirit from alcohol to water ; and the three other fides, numbered 1, 2, 3, are adapted for worts, &c. The heat and cold altering the denfity of fpirits, and giving to every degree of ftrength a pe¬ culiar degree of contra&ion and dilatation ; this cir- cumflance is confidered in dividing the Aiding rule be¬ longing to and fold with the hydrometer. This Ai¬ ding rule is nearly fimilar to that of Mr Dicas’s above- mentioned, and differs but very little from it. Some diredlions for the ufe of this hydrometer may further exemplify its fimpHcity and accuracy. Find the heat of the fpirit by a thermometer, and bring the ftar on the Hiding rule to the degree of heat on the thermometer fcale, and againft the number of the weight and letter on the ftem you have the llrength of the fpirit pointed out on the Hiding rule, which is lettered and numbered as the inftrument and weights are. The weights apply on the under ftem at C. Example. Suppofe the heat of the fpirit 65° by thb thermometer, and of fucb ftrength as to fink the hy¬ drometer to D on the ftem, without any weight ; then put the ftar (on the rule) to 6e° of the thermometer, Vol. IX. Fart I. STATICS. 9 and againft D you have 75 gallons to the too over Specific proof ; at this ftrength the concentration is 5 gallons Gravitne3-j (marked above 75) ; and the fpecific gravity is nearly ’ ■ 811, as marked below D : fo that if 75 gallons of wa¬ ter are added to 100 gallons of this fpirit, the mixture will be hydrometer proof; but will only produce in meafure 170 gallons. Again, let the heat be 50°, and the fpirit-require the weight m> t. to fink the indru- ment to I on the ftem ; then put tfte ftar to 50° of heat, and againft I on the Hiding rule you have 524- gallons to 100 over proof, concentration 2^- gallons, and the fpecific gravity 854. If the inftrument with the weight n° 2. fhould fink to Q^on the ftem, and the heat 41°, it ftiows the ftrength tq gallons to the too over proof, concentra¬ tion ^ fpecific gravity 905. If the fpirit be at 320 of heat, and the weight n° 3. finks the inftrument to letter S on the ftem on the Hiding rule, it ftiows the liquor to be 13 gallons in the 100 under proof, concentration fpecitie gravity 945. So of the reft. In afcertaining the ftrength or gravity of worts, the weight n° 4. is always to continue on the hydrometer ; and the weights n° 1, 2,3, are adapted to the fides n° 1, 2, 3, of the Square ftem j which difcovers the exaft gravity of the worts. The inftrument is adjufted fo as to fink in rain wa¬ ter at 6o° of the thermometer with the weight n° 1. to W, on the fide of the ftem n° 1. and ftiows to 26° heavier than water. The fide n° 2. with its correfpond- ing weight n° 2. ftiows from 26° to 53°, and the fide n° 3. afcertains from 530 to 8i°, or 404- pounds per barrel heavier than water; two degrees on the ftera being a pound per barrel. To ufe the hydrometer in afcertaining the gravity of two or more ’worts. Rule. Multiply the gravity of each wort by its re- fpecfive number of barrels or gallons; divide the fum of the produfts by the number of gallons or barrels ; the quotient will be the mean gravity required. Suppofe firft wort 30 barrels, at 6o° gravity, fecond wort 20 barrels, at 350 gravity, 6o° 350 30 barrels 20 barrels 1800 700 700 50)2500(50° mean gravity required. 2500 When the heat of the worts cannot be conveniently tried at 6o° of the thermometer, the following finall table ftiows the number of divifions to be added for the heat: Degrees of the thermometer 60 72 9i 99 Degrees of thehydro- meter to be added. This table is not philofophically true ; yet the error from it will not exceed a quarter of a pound per barrel in any gravity, and for fermentation ; but for more accu¬ racy in this particular Mr Quin completes a fcale which may be applied to any particular degree of heat. B Mr IO Specific Mr Nieholfon has lately improved the conftruftion Gravities. 0f tjie hydrometer, and made it a new inftrument for ^ meafuring the fpecific gravity of bodies ; and for that purpofe it appears the mofl. accurate of any yet con- ftru&ed. See fig. 9. where A A reprefents a fmall fcale, which may be taken off at D; diameter 1-5 inch, weight 44. grains. B a ftem of hardened fteel wire; diameter 3~- inch. E a hollow copper globe ; diameter 2T8S inches, weight with ftem 369 grains. FF a ftirrup of wire fcrewed to the globe at C. G a fmall fcale ferving like- wife as a counterpoife’; diameter 14 inch, weight with ftirrup 1634 grains. The other dimenfions may be had from the figure, which is y of the linear magnitude of the inftrument itfelf. In the conftru&ion, it is affumed, that the upper fcale (hall conftantly carry 1000 grains when the low¬ er fcale is empty, and the inftrument funk in diftilled water at the temperature of 6o° Fahrenheit to the middle of the wire or ftem. The length of the ftem is arbitrary, as is likewife the diftance of the lower fcale from the furface of the globe. But the length of the ftem being fettled, the lower fcale may be made lighter, and confequently the globe lefs, the greater its diftance is taken from the furface of the globe ; and the contrary. It is to be noted that the diameter of each fcale muft not be lefs than the fide of a cube of water weighing 1000 grains. The diftances of the upper and lower fcales refpec- tively from the neareft furface of the globe being fet¬ tled, add half the fide of a cube of water weighing 1000 grains to the diftance of the upper fcale. This increafed diftance, and the faid diftance of the lower fcale, may be confidercd as the two arms of a lever ; and, by the property of that mechanical power, As the number expreffing the lower diftance, Is to the whole weight above ; namely 1000 grains added to the weight of the upper fcale ; So is the number exprelfing the upper diftance, To the lower weight, when the inftrument has no tendency to any one pofition. This laft found weight muft be confiderably increa¬ fed, in order that the inftruments may acquire and prcferve a perpendicular pofition. Add together into one fum the weight of the low¬ er fcale thus found, the weight of the upper fcale and its load, and the eflimate weight of the ball and wires. Find the folid content of an equal weight, of water ; and thence, by the common rules of menfuration the diameter of an equal fphere. This will be the diame¬ ter, from outfide to outfide, of the globe that will float the whole. As this procefs, and every other part of the prefent defcription, may be eafily deduced from the well known laws of hydroftatics, it is unneceffary to enlarge here on the demonftrative part. To mcafure the fpecific gravities and thermometrical ex- panjions of fluids. If the extreme length or height «f the inftrument be moderate, its weight, when load¬ ed, will be about 3100 grains. It is, however, necef- fary in praftice, that its weight fhould be accurately found by experiment. This whole weight is equal to that of a quantity of diftilled water at the temperature ©f 6o°, whofe bulk is equal to that part of the inftru¬ ment which is below the middle of the ftem. If, therefore, the inftrument be immerfed to the middle of the ftem in any other fluid at the fame temperature Sea. irr. (which may be done by altering the load), the differ- Specific ence between this laft load and 1000 grains will be the Gravities, difference between equal bulks of water and of the —“"V"—-. other fluid, the weight or the mafs of water being known to be 3100 grains. If the faid difference be excefs above 1000 grains it muft be added, or if it be defeft fubtra&ed from 3100 grains: the fum or re¬ mainder will be a number whofe ratio to 3100 will ex- prefs the ratio of the fpecific gravity of the affumed fluid to that of water. And this ratio will be expref- fed with confiderable accuracy ; for the inftrument ha¬ ving a cylindrical ftem of no more than of an inch diameter, will be raifed or depreffed near one inch by the fubtradlion or addition of of a grain, and will therefore indicate with eafe fuch mutations of weight as do not fall ihort of of a grain, or y-T^trs-th part of the whole. Confequently, the fpecific gravities of all fluids, in which this inftrument can be immerfed, will be found to five places of figures. It is evident, that this inftrument is a kind of ther¬ mometer, perhaps better adapted than the common one for meafuring the expanfions of fluids by heat. As the fluid, in the common thermometer, rifes by the excefs of expanfion of the fluid beyond the expanfion of the glafs veffel; fo this inftrument will fall by the excefs of the fame expanfion beyond the proper expanfion of the materials it is compofed of. To meafure the fpecific gravities of folid bodies. The fo¬ lid bodies to be tried by this inftrument muft not ex¬ ceed lodo grains in weight. Place the inftrument in diftilled water, and load the upper fcale or difh till the* furface of the water interfe&s the middle of the ftem. If the weights required to effeft this be exa&ly 1000* grains, the temperature of the water anfwers to 6o° of Fahrenheit’s fcale ; if they be more or lefs than* 1000 grains, it follows, that the water is colder or warmer. Having taken a note of this weight, unload the fcale, and place therein the body whofe fpecific gravity is required. Add more weight, till the furface of the water again bifedts the ftem. The difference between the added weight and the former load is the weight of the body in air. Place now the body in* the lower fcale or difh under water, and add weights on the upper fcale till the furface of the water once more bifedts the ftem. This laft added weight will be the difference between 1000 grains and the weight of the body in water. To illuftrate this by an example. N. B. The fpecific gravity of lead and tin, and (probably other metals) will vary in the third figure when the fame piece of metal is melted and cooled a fecond time. This difference probably arifes from the ar¬ rangement of the parts in cooling more or lefs fuddenly Grains. The load was found by experiment - 999,10. A piece of caft lead required the addi¬ tional weight - - 210,85 Difference is abfolute weight in air 788,25 Additional weight when the lead was in the lower fcale - - 280,09 Difference between the two additional weights or lofs by immerfion - 69,24 788.25 11384 Hence fpecific gravity =. —- 69.24 1000 When HYDROSTATICS. Sea.IIT. HYDROS Specific When the inftrument is once adjufted in diftilled wa- Gravities. {erj common water may be afterwards ufed. For the I 1 * " ratio of the fpecific gravity of the water made ufe of to that of dillilled water being known ( = -)> and the I ratio of the fpecific gravity of the folid to the water made ufe of being alfo known (=:^), the ratio of the fpecific gravity of the folid to that of diftilled water cb will be compounded of both (that is, There is reafon to conclude from the experiments of various authors, that they have not paid much atten¬ tion either to the temperature or fpecific gravity of the water they made ufe of. They who are inclined to be contented with a lefs degree of precifion than is intended in the conftru6tion here deferibed, may change the ftetn, which for that purpofe may be made to take out for a larger. One of the greateft difficulties that attends hydro- ftatical experiments, arifes from the attra&ion or repul- fion that obtains at the furface of the water. After trying many expedients to obviate the irregularities ariiing from this caufe, Mr Nicholfon finds reafon to prefer the Ample one, of carefully wiping the wffiole iriftrument, and efpecially the ftem, with a clean cloth. The weights in the dilh muft not be efteemed accu¬ rate while there is either a cumulus or a cavity in the water round the ftem. _ . Yet, after all, we cannot with great geometrical certainty rely upon either the hydrometer or the hy- droftatic balance ; for there are fome natural inconve¬ niences that difturb the exaftnefs with which they dif- cover the fpecific gravities of different bodies. Thus, if the weather be hotter at one time than another, all fluids will fwell, and confequently they will be lighter than when the weather is cold : the air itfelf is at one time heavier than at another, and will buoy up bodies weighed in it; they will therefore appear lighter, and will of confequence feem heavier in water. In fhort, there are many caufes that would prevent us from ma¬ king tables of the fpecific gravities of bodies, if rigo¬ rous exaftnefs were only expe&ed ; for the individuals of every kind of fubftauce differ from each other, gold from gold, and water from water. In fuch tables, therefore, all that is expefted is to come as near the exaft weight as we can ; and from an infpe&ion into feveral, we may make an average near the truth. Thus, Mufchenbroek’s table makes the fpecific gravity of rain-water to be nearly eighteen times and an half lefs than that of a guinea; whereas our Englifh tables make it to be but feventeen times and an half, nearly, lefs than the fame. But though there may be fome minute variation in all our tables, yet they ia general may ferve to condudt us with fufficient accuracy. In conftrufting tables of fpecific gravities with ac¬ curacy, the gravity of water muft be reprefented by unity or i.ooo, where three cyphers are added to give room for expreffing the ra'ios of other gravities in decimal parts, as in the following table. / T A T I C S. A TABLE of the SpEcrrrc GaAvirrES of feveral Solid and Fluid Bodies. jTroy weight. A cubic inch of .oz. pw. gr. 3-83 6.44 17 19.84 11.61 Very fine gold Standard gold Guinea gold Moidore gold Qmckfilver Lead Fine filver Standard filver Copper Plate-brafs Steel Iron Block-tin Spelter Lead ore Glafs of antimony German antimony Copper ore Diamond Clear glafs Lapis lazuli - Welch afteftos White marble Black ditto Rock cryllal Green glafs - Cornelian ftone Flint - Hard paving ftone Live fulphur - Nitre Alabafter Dry ivory Brimftone Alum Ebony Human blood Amber Cow’s milk Sea-water Pump-water - Spring-water Diftilled water Red wine Oil of amber Proof fpirits - Dry oak Olive oil Pure fpirits Spirit of turpent. Oil of turpentine Dry crabtree Saffafras wood Cork '7-55 5 16 23.23 3-36 3 7.04 4 9.60 2 20.12 o 15-20 7 5-c8 4 12.86 1 17.76 6.89 4.8c 20.c 5.58 12 5. tio 17.57 8 13.4 8 12.65 8 1.00 7 »5-38 7 6 19.63 5 22.87 1 2.40 o 1.08 o 19 18.74 o 19 6.09 O r8 23.76 o 17 21.92 o u 18 82 o II 2.89 o lO 20.79 o 10 20.79 o 10 20.79 o TO 13.30 O 10 12.94 O 10 11.42 o 10 11.42 o 10 7.63 o 9 19.73 o 9 18.00 15-1? 3‘27 2.76 8-53 1.69 2.04 2,77i Avoirdu, 3Z. drams. 1 5.80 10 14.90 10 4.76 9 147 8 1.45 6 9.08 6 6.66 6 1.54 5 i.r 4 10.09 4 8.70 4 6-77 4 3-79 4 i-42 3 I4-96 3 0.89 2 5-°4 2 4-43 1 15.48 1 ,3.16 1 12.27 1 10.97 1 9.06 r 9.02 1 8.6 1 8.26 1 7-73 1 7-53 1 6.77 1 2.52 1 1.59 1 I-35 1 0.89 1 0.66 o 15.72 O IO.34 o 9.76 o 9.54 O 9.54 O 9.54 0 9.26 o 9. 5 o 9.20 o 9.20 o 9.06 o 8.62 o 8 56 o 8.45 o 8.02 o 7.99 ° 7-33 o 7.08 o 4.46 O 2.21 Compa¬ rative veight 19-63 7 '.888 793 140 019 325 087 535 843 000 852 645 3 2 065 800 280 000 75 400 5° °54 9i3 707 704 658 620 568 542 [.60 000 900 875 825 800 7'4 17 054 030 030 030 000 999 993 993 978 931 925 9i3 66 64 72 65 .82 40 Take away the decimal point from the numbers i._ the right-hand column, or (which is the fame) mul¬ tiply them by 1000, and they will fhow how many B 2 ounces II Specific Gravities. Tabic of fpecifie gra¬ vities. 12 HYDROS Hydranlies.ounces avoirdupois are contained in a cubic foot of *"1 ' each body. How to ^ie U^e t^ie ta^ ^Pec^c w>^ beft; find out appear by an example. Suppofe a body to be cotn- the quan. pounded of gold and filver, and it is required to End tky of adu’.- the quantity of each metal in the compound. metals'1 'n t'ie fpec‘fic gravity of the compound, by weighing it in air and in water; and dividing its aerial weight by what it lofes thereof in water, the quotient will {how its fpecific gravity, or how many times it is heavier than its bulk of water. Then fubtraft the fpecific gravity of filver (found in the table) from that of the compound, and the fpecific gravity of the com¬ pound from that of gold ; the firll remainder {hows the bulk of gold, and the latter the bulk of filver, in the whole compound: and if thefe remainders be mul¬ tiplied by the refpe&ive fpecific gravities, the products will lhow the proportion of weights of each metal in the body. Suppofe the fpecific gravity of the compounded body be 13; that of ftandard filver (by the table) is J0.5, and that of gold 19.63: therefore 10.5 from 13, remains 2.3, the proportional bulk of the gold; and 13 from 19.63, remains 6.63, the proportional bulk of filver in the compound. Then, the firft. remainder 2.5, multiplied by 19.63, the fpecific gravity of gold, produces 49.075 for the proportional weight of gold; and the laft remainder 6.63 multiplied by 10.5, the fpecific gravity of filver, produces 69.6x5 for the pro¬ portional weight of filver in the whole body. So that for every 49.07 ounces or pounds of gold, there are 69.6 pounds Or ounces of filver in the body. Hence it is eafy to know whether any fufpe&ed me¬ tal be genuine, or allayed, or counterfeit; by finding how much it is heavier than its bulk of water, and comparing the fame with the table: if they agree, the metal is good; if they differ, it is allayed or coun¬ terfeited. ** A cubical inch of good brandy, rum, or other proof ^imouf7fPir‘t3’ weighs 235-7 grains; therefore, if a true inch hiuors. cube of any metal weighs 235.7 grains lefs in fpirits than in air, it {hows the fpirits are proof. If it lofes lefs of its aerial weight in fpirits, they are above proof; if it lofes more, they are under: For, the better the fpirits are, they are the lighter; and the worfc, the heavier. T A T I C S. Sea. IV. by water are entirely conftru&ed; feveral different en- Hydraulica.J gines ufed in the mechanic arts, various kinds of mills, ^ \ pumps, and fountains, are the refuk of this theory, ju- dicioufiy applied. zi : And what is thus demonflrated of the bottom of the The v/la“ veffel, is equally true at every other depth whatfoever. T.pf ii« tlipn tpilnpp this mm a theorem ! irplnntv L . . Sect. IV. Hydraulics. Hydraulics is that part of hydroftatics, which teaches to eftimate the fwiftnefs or the force of fluids in motion. It has been always thought an inquiry of great cu- riofity, and ftill greater advantage, to know the caufes by which water fpouts from velfels to different heights and diftances. We have obferved, for inftance, an open veffel of liquor upon its ftand, pierced at the bottom: the liquor, when the opening is firft. made, fpouts out with great force; but as it continues to run, becomes lefs violent, and the liquor flows more feebly. A knowledge of hydraulics will inftruft us in the caufe of this diminution of its ftrength; it will {how precife- ly how far the liquor will fpout from any veffel, and how fall or in what quantities it will flow. Upon the principles of this Icience, many machines worked Let us then teduce this into a theorem: 'Hhe velocity^ 101th which water fpouts out at a hole in- the Jide or bottom of a vejfet, is as the fquare root of the depth or SJlance of the hole below the furface of the water. For, in order to make double the quantity of a fluid run through one hole as through another of the fame fize, it will require four times the preffure of the other, and there- foie mull be four times the depth of the other below the furface of the water: anti for the fame reafon, three times the quantity running in an equal time through the fame fort of hole, muft run with three times the velocity ; which will require nine times the preffure, and confequently muft be nine times as deep below the furface of the fluid : and fo on.— To prove P]ate this by an experiment: Let two pipes, as C andg, ofcexxxna equal-fixed bores, be fixed into the fide of the veffel ^•9-, AB ; the pipe g being four times as deep below the furface of the water at b in the veffel as the pipe C is: and whilft thefe pipes run, let water be conftantly poured into the veffel, to keep the furface ftill at the fame height. Then if a cup that holds a pint be fo placed as to receive the water that fpouts from the pipe C, and at the fame moment a cup that holds a quart be fo placed as to receive the water that fpouts , from the pipe g, both cups will be filled at the fame time by their refpeftive pipes. The horizontal dillance to which a fluid will fpout The hori-: from a horizontal pipe in any part of the fide of an^^di* upright veffel below the furface of the fluid, is equal t0!y3njch wa. twice the length of a perpendicular to the fide of the ter will veffel, drawn from the mouth of the pipe to a femi-fpout from circle deferibed upon the altitude of the fluid : andP'P®* therefore, the fluid will fpout to the greateft diftance pofiible from a pipe whofe mouth is at the centre of the femicircle; becaufe a perpendicular to its diame¬ ter (fuppofed parallel to the fide of the veffel) drawn from that point, is the longeft that can poffibly be drawn from any part of the diameter to the circumfe¬ rence of the femicircle. Thus, if the veffel AB be full of water, the horizontal pipe D be in the middle of its fide, and the femicircle be deferibed up¬ on D as a centre, with the radius or femrdiameter D £ N, or the perpendicular D d to the diame¬ ter ND£,is the longeft that can be drawn from any part of the diameter to the circumference N e d c b. And if the veffel be kept full, the jet G will fpout from the pipe D, to the horizontal diftance N M, which is double the length of the perpendicular D d. If two other pipes, as C and E, be fixed into the fide of the veffel at equal diftances above and below the pipe D, the perpendiculars C c and E e, from thefe pipes to the femicircle, will be equal: and the jets F and H fpouting from them will each go to the horizon¬ tal diftance NK; which is double the length of either of the equal perpendiculars C c or D or zt 30, or zi 33, or 2jr $6, or 3 y 1, or 4|. 65, or si 72, or 6 84, or 7 96, or 8 whereby the jet is delivered, and the pipe condudiug Hydraulic it from the head. In general, Aboutfve times the dia- EngiiKS- meter of the adjutage for jets under half an inch, and fix or v "~J feven times for all above, will fve the pipes of conduit pretty well: not but it will always be an error on the right fide, to have them rather larger than in ftridnefs they ought to be, that the jet may always be freely fupplied with water, and in due time. For a like reafon, if there be occafion for a cock to be placed in any part of the pipe of condud, particular care muft be taken that it (hould be there bigger in proportion, that the water-way may not be pinched ; but that the cavity be left at leaft equal to the bore of the reft of the pipe. The bore of an adjutage cannot be too fmooth or true. Thofe that are cylindrical are beft ; thofe that are bored conical worft, becaufe of the refledions of the water from the inclined fides of the machine, which in the hurry of the iffuing ftream will in them unavoidably be made. When fluids are defigned to be raifed higher than the fprings from whence they flow, forcing engines muft be ufed ; of which and other hydraulic machines, we come now to give a particular account. Sect. V. Hydraulic Engines. x8 The pump is at once the moft common and moftOf pumps*- ufeful of all the hydraulic inftruments. It was firft invented by Ctefebes, a mathematician of Alexandria, 120 B. C.; when the air’s preffure came afterwards to be known, it was much improved, and it is now brought to a great degree of perfedion. Ctefebes’s pump aded both by fudion and pulfion ; Plate and its ftrudure and adion are as follow :—A brafs cy- CCXLlIIi linder ABCD, furniftied with a valve in L, is placed in 15’ the water. 2. In this is fitted the embulus MK, made of green wood, which will not fwell in the water, and adjufted to the aperture of the cylinder with a covering of leather, but without any valve. In H is fitted on another tube NH, with a valve that opens upwards in I. Now, the embulus EK being raifed, the water opens the valve in L, and rifes into the cavity of the cylinder:—and when the fame embulus is again de- preffed, the valve I is opened, and the water driven up through the tube HN. This is the pump ufed among the ancients, and that from which the others after- mentioned are deduced. Sir S. Morland has endea¬ voured to increafe its force by leffening the fri&ion ; which he has done to good effeft, infomuch as to make it work without almoft any friftion at all. Of this pump as now ufed there are Amply three kinds, viv. the fucking, the forcing, and the lifting- pump. By the two latt, water may be raifed to any height, with an adequate apparatus and fufficient pow¬ er : by the former it may, by the general preffure of the atmofphere on the furface of the well-water, be raifed no more than 33 feet, as was before hinted, though in pradtice it is feldom applied to the raifing it much above 28 ; becaufe from the variations obferved on the barometer, it is apprehended that the air may, on cer¬ tain occafions, be fomething lighter than 33 feet of water ; and whenever that ftiall happen, for want of the due counterpoife, this pump may fail in its per¬ formance. The* HYDROSTATICS. * Sea. V, Hydra oil-. The. common fucling-pump, with which we draw wa- lingines. ter out 0f weus> ;g an engine both pneumatic and hy- 1 v draulic. It confifts of a pipe open at both ends, in The com- which is a moveable pifton, bucket, or fucker, as mon pump, big as the bore of the pipe in that part wherein it works; and is leathered round, fo as to fit the bore exaftly; and may be moved up and down, without •fuffering any air to come between it and the pipe or pump-barrel. We (hall explain the ccnftru&ion of this and the forcing-pump by pi&ures of glafs models, in which both the a&ion of the pitlons and motion of the valves are feen. Hold the model DCBL upright in the veflel of wa- T'CXLI. ter.K, the water being deep enough to rife at lead as V' high as from A to I. The valve a on the moveable bucket G, and the valve l on the fixed box H (which box quite fills the bore of the pipe or barrel at H), will each lie clofe, by its own weight, upon the hole in the . bucket and box, until the engine begins to work. The valves are made of brafs, and covered underneath with leather for clofing the holes the more exaftly : and the bucket G is railed and depreffed alternately by the handle E and rod D d, the bucket being fuppofed at B before the working begins. Take hold of the handle E, and thereby draw up the bucket from B to C, which will make room for the air in the pump all the way below the bucket to dilate itfelf, by which its fpring is weakened, and then its force is not equivalent to the weight or preiTure of the outward air upon the water in the veffel K : and therefore, at the firft ftroke, the outward air will prefs up the water through the notched foot A, into the lower pipe, about as far as e: this will condenfe the rarefied air in the pipe between e and C to the fame flate it was in before; and then, as its fpring within the pipe is equal to the force or prefl’ure of the out¬ ward air, the water will rife no higher by the firft dlroke ; and the valve £, which was rkifed a little by the dilation of the air in the pipe, will fall, and ftop the hole in the box H ; and the furface of the water •will Hand at e. Then deprefs the pifton or bucket from C to B ; and as the air in the part B cannot get back again through the valve b, it will (as the bucket de¬ scends) raife the valve a, and fo make its way through the upper part of the barrel d into the open air. But upon raifing the bucket G a fecond time, the air be¬ tween it and the water in the lower pipe at a will be again left at liberty to fill a larger fpace ; and fo its ipring being again weakened, the preiTure of the out¬ ward air on the water in the veifel K will force more water up into the lower pipe from e to f; and when the bucket is at its greateft height C, the lower valve b will fall, and ftop the hole in the box H as before. At the next ftroke of the bucket or pifion, the water will rife through the box H towards B ; and then tkp valve b, which was raifed by it, will fall when the bucket G is at its greateft height. Upon deprefiing the bucket again, the water cannot be pufhed back through the valve which keeps clofe upon the hole whilft the pifton defeends. And upon raifing the pifton again, the outward preflure of the air will force the water up through H, where it will raife the valve, and follow the bucket to C. Upon the next deprefiion of «, w, ^,y, in 12 pumps; nine where¬ of, as L, M, N, O, P, Q^R, S, T, appear in the plate ; the other three being hid behind the work at V. And as pipes may go from all thefe pumps, to con¬ vey the water (drawn up by them to a fmall height) into a clofe cillem, from which the main pipe pro¬ ceeds, the water will be forced into this ciftern by the defcent of the piftons. And as each pipe, going from its refpeftive pump into the ciftern, has a valve at its end in the ciftern, thefe valves will hinder the return of the water by the pipes; and therefore, when the ci¬ ftern is once full, each pifton upon its defcent will force the water (conveyed into the ciftern by a former ftroke) up the main pipe, to the height the engine was intended to raife it: which height depends upon the quantity raifed, and the power that turns the wheel. When the power upon the wheel is leffened by any de- fed of the quantity of water turning it, a proportion- able number of the pumps may be laid afide, by aifen- gaging their rods from the vibrating levers. This figure is a reprefentation of the engine ere&ed 8t Blenheim for the duke of Marlborough, by the late ingenious Mr Alderfea. The water-wheel is 73- feet in diameter, according to Mr Switzer’s account in his Hydraulics. When fuch a machine is placed in a ftream that runs upon a fmall declivity, the motion of the levers and adion of the pumps will be but flow; fince the wheel muft go once round for each ftroke of the pumps. But when there is a large body of flow run¬ ning water, a cog or fpur-wheel may be placed upon each fide of the water-wheel AA, upon its axis, to turn a trundle upon each fide; the cranks being upon the axis of the trundle. And by proportioning the cog-wheels to the trundles, the motion of the pumps may be made quicker, according to the quantity and ftrength of the water upon the firft wheel; which may be as great as the workman pleafes, according to the length and breadth of the float-boards or wings of the wheel. In the fame manner the engine for raifing water at London-Bridge is conftruded. iHate The wheels of the London-bridge water-works are «:XLI[. p]aCed under the arches of the bridge, and moved by 7' the common ftream of the tide-water of the river. A B the axle-tree of the water-wheel is nineteen feet long, and three feet in diameter ; in which C, D, E, F, are four fets of arms, eight in each place, on which are fixed G G G G, four fets or rings of felloes twen¬ ty feet in diameter, and the floats H H H fourteen feet long, and eighteen inches deep, being about twenty-fix in number. The wheel lies with its two gudgeons, or centre pins, A, B, upon two braffes in the pieces M N, whicK are two great levers, whofe fulcrum or prop is an arched piece of timber L; the levers being made circular on their lower fides to an arch of the radius M O, and kept in their places by two arching ftuds fixed in the flock L, through two mortoifes in the lever M N. The wheel ia by thefe le¬ vers made to rife and fall with the tide in the following T A T I C S. Sea.V* manner. The levers M N are fixteen feet long ; from Hydraulic M the fulcrum of the lever to O the gudgeon of Ungwea- ^ the water-wheel, fix feet; and from O to the arch ’ at N, ten feet. To the bottom of the arch N is fixed a ftrong triple chain P, made after the fafhion of a watch-chain, but the links arched to a circle of one foot diameter, having notches or teeth to take hold of the leaves of a pinion of call iron Q^ten inches dia¬ meter, with eight teeth in it moving on an axis. The other loofe end of this chain has a large weight hang¬ ing at it to help to counterpoife the wheel, and pre- ferve the chain from Aiding on the pinion. On the fame axis is fixed a jeog-wheel R, fix feet diameter, with forty-eight cogs. To this is applied a trundle, or pinion S of fix rounds or teeth ; and upon the fame axis is fixed T, a cog-wheel of fifty-one cogs, into which the trundle V of fix rounds works, on whofe axis is a winch or windlafs W, by which one man with the two windlafles raifes or lets down the wheel as there is occafion. And becaufc the fulcrums of thefe levers M N are in the axis of the trundle K, vzz. at M or X, in what fituation foever the wheel is raifed or let down, the cog-wheel I, I, is always equidiftant from M, and works or geers truly. By means of this machine the ftrength of an ordinary man will raife about fifty ton weight. I, I, is a cog-wheel fixed near the end of the greet axis eight feet diameter, and forty-four cogs working into a trundle K, of four feet and an half diameter, and twenty rounds, whofe axis or fpindle is. of call iron four inches in diameter, lying in braflea at each end as at X. ZZ is a quadruple crank of call iron, the metal being fix inches fquare, each of the necks being turned one foot from the centre, which is fixed in braffes at each end in two headftocks faftened down by caps. One end of this crank at Y is placed clofe abutting to the end of the axle-tree X, where they are at thofe ends fix inches diameter, each having a flit in the ends where an iron wedge is put one half into the end X, the other half into Y, by means of which the axis X turns about the crank ZZ. The four necks of the crank have each an iron fpear or rod fixed at their upper ends to the refpedtive libra or lever,, a 1, 2, 3, 4, within three feet at the end. Thefe levers are twenty-four feet long, moving on centres ia the frame bhbb ; at the end of which, at c 1, 2, 3, 4, are jointed four rods with their forcing plugs working into d 1, 2,’3, 4, four call iron cylinders four feet three quarters long, feven inches bore above and nine below where the valves lie, faftened by ferewed flanches over the four holes of a hollow trunk of caft iron, har ving four valves in it juft over eeeetrt. the joining on of the bottom of the barrels or cylinders, and at one end a fucking pipe and grate f going into the water, which fupplies all the four cylinders alternately. From the lower part of the cylinders d l, d 1, d 3, d 4, come out necks turning upward arch-wife, as ggggt whofe upper parts are call with flanches to ferew up to the trunk hhbh\ which necks have bores of feven inches diameter, and holes in the trunk above communicating with them, at which joining are placed four valves. The trunk is caft witH four boffes or pro¬ tuberances Handing out againftthe valves to give room for their opening and {hutting ; and on the upper fide are four holes flopped with plugs to take out on, occa¬ fion to cleanfc _the valves. One end of this trunk is ^6 - ‘ flopped Ssa.V. HYDROS Hydraulic flopped by a plug To the other iron pipes are joined Engines. as j 2f by flanches, through which the water is forced up to any height or place required. Befides thefe four forcers there are four more placed at the other ends of the librae, or levers (not fhown here to avoid confufion, but to be feen on the left hand), the rods being fixed at rf I, 2, 3,4, working in four fuch cylinders, with their parts dd, &c. e e,f, gg, and i, as before defcribed. Handing near h h. T A T I C S. 19 of the ft iff leather commonly ufed. Dr Defagullers Hydraulic has formed a comparifon of the powers of this engine ngtnes. ^ with thofe of the famous machine at Marly. Efti- mating the quantity of water merely raifed by thefe machines, the former raifes almoft twice and a quarter * as much as the latter ; but confidering that the Lon¬ don bridge water-works raife this water but 120 feet high, and that the Marly engine raifes its water 533 feet high, he deduces from a calculation formed on At the other end of the wheel (at B) is placed all thefe different heights, and on the difference of the -c r— J a r-j-r—.-l-j pa]j 0f water on both engines, this conclufion, w*. that the effect of the four wheels at London-bridge is three times greater than that of four of the wheels at Marly. The engine at London-bridge was put up by Mr Sorocold towards the beginning of this century : the contrivance for raffing and falling the water-wheel was the invention of Mr Hadley, who put up the firlt of that kind at Worcefter, for which he obtained a pa* the fame fort of work The cog-wheel I. The trundle K. The fpindle X. The crank Y, Z. s at the end A is defcribed, The four levers a c, a c, &c. 8 forcing rods ad, ad, &c. 8 Cylinders de, de, &c. 4 Trunks fuch as ee, hh. The fucking pipes f. 2 Forcing pipes as i. So that one Angle wheel works 16 pumps. All which work could not be drawn in one perfpec- tive view without making it very much confufed. Mr Beighton, who has defcribed the ftru&ure and tent. operation of this engine (fee Phil. Tranf. abr. vol. vi. p. 358.) has calculated the quantity of water raifed by it in a given time. In the firll arch next the city there is one wheel with double work of fixteen forcers; and in the third arch one wheel with double work at one end and fingle at the other, having twelve forcers 5 a fecond wheel in the middle having eight forcers, and a third wheel with fixteen : fo that there are in all fifty-two forcers ; one revolution of a wheel produces in every forcer 2f ftrokes; fo that one turn of the 33 ABCD is a wheel turned by water according to the A quadra- order of the letters. On the horizontal axis are four fmall w’heels, toothed almoft half round ; and the parts raiGng Wa« of their edges on which there are no teeth are cutter, down fo as to be even with the bottoms of the teeth plate where they ftand. figfif1*' The teeth of thefe four wheels take alternately in¬ to the teeth of four racks, which hang by two chains over the pullies Q^_and L ; and to the lower ends of thefe racks there are four iron rods fixed, which go four wheels makes 114 ftrokes. When the river a&s down into the four forcing-pumps, S, R, M, and N. with moft advantage, the wheels go fix times round in minute, and but 44- at middle water : hence the num¬ ber of ftrokes in a minute is 684 ; and as the ftxoke is 24 feet in a feven-inch bore, it raifes three ale gal¬ lons j aod all raife per minute 2052 ale gallons; i. e. 23120 gallons = 1954 hogftieads per hour, and at the And, as the wheels turn, the racks and pump-rods are alternately moved up and down. Thus fuppofe the wheel G has pulled down the rack I, and drawn up the rack K by the chain : as the laft tooth of G juft leaves the uppermoft tooth of I, the firft tooth of H is ready to take into the lowermoft rate of 46896 hoglheads in a day, to the height of tooth of the rack K, and pull it down as far as the 120 feet. Such is the utmoft quantity they can raife, fuppofing that there were ne imperfedtions or lofs at all ; but Mr Beighton infers, from experiments per¬ formed on engines whofe parts were large and excel¬ lently conftrudted, that they will lofe one fifth and fometimes one fourth of the calculated quantity. For an eftimate of the power by which the wheels are moved, fee Phil. Tranf. ubi fupra. Mr Beighton obferves, that though thefe water¬ works may juftly be efteemed as good as any in Europe, yet fome things might be altered much for the better. If (he fays), inftead of fixteen forcers, they worked teeth go ; and then the rack I is pulled upward thro’ the whole fpace of its teeth, and the wheel G is ready to take hold of it, and pull it down again, and to draw up the other.—In the fame manner, the wheels E and F work the racks O ajid P. Thefe four wheels are fixed on the axle of the great wheel in fuch a manner, with refpedt to the pofitions of their teeth, that, whilft they continue turning round, there is never one inftant of time in which one or other of the pump-rods is not going down and forcing the water. So that, in this engine, there is no occafion for having a general air-veflel to all the pumps, to pro- only eight, the ftroke might be five feet in each forcer, cure a conftant ftream of water flowing from the up- which would draw much more water with the fame per end of the main pipe. power in the wheel; becaufe much water is loft by the two frequent opening and (hutting of the valves ; and that the bores that carry off the -water from the From each of thefe pumps, near the loweft end, in the water, there goes off a pipe, with a valve on its fartheft end from the pump ; and thefe ends of the forcers are too fmall; and that they fhould be near pipes all enter one clofe box, into which they de' nine inches in diameter. This obje&ion Dr Defagu- liver the water : and into this box the lower end of Hers fays is of no force, unlefs the velocity of the piftons the main conduft-pipe is fixed. So that, as the wa- was very great ; but here the velocity of the water ter is forced or puflied into the box, it is alfo pufhed paffing through the bores is much lefs than two feet up the main pipe to the height that it is intended to in a fecond. This laft writer obferves, that a triple be raifed. crank diftrrbutes the power better than a quadruple one. He adds, that forcers made, with thin leather ... Where a ftream or fall of water cannot be had, e ,ineM and gentlemen want to have water raifed, and brought go'by tanned, of about the thicknefs of the upper-leather of to their houfes from a rivulet or fpring ; this may be hoifea. a countryman’s ihoe, would be much better than thofe effected by a horfe-engine, wprking three forcing- C 2 pumps, 20 HYDROS Hydraulic pamps wlijch ftand in a refervoir filkd by the fpring ..Engine-. ^ or rjvu]tt: the piftons being moved up and down in j>late* the pumps by means of a triple crank ABC, which, CCXLI. as it is turned round by the trundle G, raifes and de* ihj- 6. preffes the rods D, E, F. If the wheel has three times as many cogs as the trundle has ftaves or rounds, the trundle and cranks will make three revolutions for every one of the wheel: and as each crank will fetch a itroke in the time it goes round, the three cranks will make nine ftrokes for every turn of the great wheel. The cranks Ihould be made of call iron, becaufe that will not bend ; and they fhould each make an angle of 120 with both of the others, as at a, b, c; which is (as it were) a view of their radii in looking endwife at the axis : and then there will be always one or other of them going downward, which will pulh the water forward with a continued iiream into the main pipe. For when b is almoft at its lowed fituation, and is therefore juft beginning to lofe its a&ion upon the pifton which it moves, c is beginning to move downward, which will by its pifton continue the propelling force upon the water : and when c is come down to the pofition of b, a will be in the pofition of c. The more perpendicularly the pifton rods move up and down in the pumps, the freer and better will their ftrokes be : but a little deviation from the perpendicu¬ lar will not be material. Therefore, when the pump- rods D, E, and F, go down into a deep well, they may be moved direftly by the cranks, as is done in'a very good horfe-engine of this fort at the late Sir James Creed’s at Greenwich, which forces up water about 64 feet from a well under ground, to a refervoir on the top of his houfe. But when the cranks are only at a fmall height above the pumps, the piftons muft be moved by vibrating levers, as in the above en¬ gine at Blenheim : and the longer the levers are, the nearer will the ftrokes be to a perpendicular. 35 Let us fuppofe, that in fuch an engine .as Sir James A cakula- Creed’s, the great wheel is 12 feet diameter, the tion of the trundle 4 feet, and the radius or length of each crank water*that^^ *nc^es> working a pifton in its pump. Let there be may berai- t^ree Pumps in all, and the bore of each pump be four fed by a inches diameter. Then, if the great wheel has three horfe en- times as many cogs as the trundle has ftaves, the trun- gine. dle and cranks will go three times round for each re¬ volution of the horfes and wheel, and the three cranks will make nine ftrokes of the pumps in that time, each ttroke being 18 inches (or double the length of the crank) in a four-inch bore. Let the diameter of the horfe-walk be 18 feet, and the perpendicular height to which the water is raifed above the furface of the well be 64 feet; If the horfes go at the rate of-two miles an hour (which is very moderate, walking) they will turn the great wheel' 187 times round in an hour. In each turn of the wheel the piftons make nine ftrokes in the pumps, which amount to 1683 in an hour. Each ftroke raifes a column of water 18 inches long and four inches thick, in the pump-barrels; which co¬ lumn, upon the defeent of the pifton, is forced into the main pipe, whofe perpendicular altitude above the furface. of the well is dpTeet* T A T I C S. Sea. V. Now, fince a column of water 18 inches long, and Hydraulic 4 inches thick, contains 226.18 cubic inches, tins number multiplied by 1683 (the ftrokes in an hour) ^ " ^ gives 380661 for the number of cubic inches of water raifed in an hour. A gallon, in wine-meafure, contains 231 cubic inches, by which divide 380661, and it quotes 146? in round numbers, for the number of gallons raifed in an hour; which, divided by 63, gives 26^ hogiheads. If the horfes go falter, the quantity raifed will be fo much the greater. In this calculation it is fuppofed that no water is wafted by the engine. But as no forcing engine can be fuppofed to lofe lefs than a fifth part of the calculated quantity of water, between the piftons and barrels, and by the opening and (hutting of the valves, the borfes ought to walk almoft 2x miles per hour to fetch up this lofs. A column of water 4 inches thick and 64 feet high, weighs 349rV pounds avoirdupois, or 424^ pounds troy; and this weight, together with the friction of the engine, is the refiftance that muft be overcome by the ftrength of the horfes. The horfe-tackle (hould be fo contrived, that the horfes may rather puih on than drag the levers after them. For, If they draw, in going round the walk, the outfide leather-ftraps will rub againft. their fides and hams ; which will hinder them from drawing at right angles to the levers, and fo make them pull at a. difadvantage. But if they pufh the levers before their breafts, inftead of dragging them, they can always walk at right angles to thefe levers. It is no ways material what the diameter of the main dr conduct pipe be : for the whole refiftance of the water therein againft the horfes will be according to the height to which it is raifed, and the diameter of that part of the pump in which the pifton works, as we have already obferved. So that by the fame pump, an equal quantity of water may be raifed in .(and con- fequently made to run from) a pipe of a foot diameter,. with the fame eafe as ima pipe of five or fix inches: or rather with more eafe, becaufe its velocity in a large pipe will be lefs than in a fmall one, and there* fore its fri&ion againft the- fides of the. pipe will be lefs alfo. And the force required to raife water depends not upon the length of the pipe, but upon tire perpendi¬ cular height to which it is raifed therein above the le- Plate vel of the fpring. So that the fame force which CCXLI, would raife water to the height AB in the upright 7* pipe Ai k.lmn 0 p q ¥>, will raife it to the fame height or level BIH in the oblique pipe AEFGH. For the preffure of the water at the end A of the latter is no more, than its preffure againft. the end A of the. former. The weight or preffure of water at the lower end : of the pipe, is always as the fine of the angle to which the pipe is elevated above the level parallel to the horizon. For although-the water in the upright pipe AB would require a force applied immediately to the lower end A equal to the weight of all the water in it, to fupport the water, and a little more to drive it up and out of the pipe ; yet, if that pipe be in¬ clined from its upright pofition to an angle of 80 de¬ grees (as in A 80), the force required to fuppert or to Sea. V. Hydraulic raife the fame cylinder of water will then be as much Engine?. Ids as the fine 80 A is leis than the radius AB ; or as v the fine of 80 degrees is lefs than' the fine of 90. And fo, decrealing as the fine of the angle of elevation lef- fens, until it arrives® at its level AC or place of reft, where the force* of the water is nothing at either end of the pipe. For although the aofbliite weight of the water is the fame inhll pofitipns, yet its preffure at the lower end decreafes as the fine of the angle of eleva¬ tion detreafes ; asi will appeaf plainly by a farther con- fideration of the figure. Let two pipes AB and AC, of equal lengths and bores, join each other at A ; and let the pipe AB be divided into 100 equal parts, as the fcale S is ; whofe length is equal to the length of the pipe.— Upon this length, as a radius, defciibe the quadrant BDC, and divide it into 90 equal parts or degrees. Let the pipe AC be elevated to to degrees upon the quadrant, and filled with water : then, part of the water that is in it will rife in the pipe AB; and if it be kept full of water, it will raife the water in the pipe AB from A to i; that is, to a level i 10 with the mouth of the pipe at 10 : and the upright line a 10, equal to A e, will be the fine of 10 degiees elevation ; which being meafuredjupon, the fcale S, will be about 17.4 of fuch parts as the pipe contains ioo„'in length : and therefore, the force or preffure of the water at A, in the pipe A 10, will be to the force or preflure at A an the pipe AB, as 17.3 to !ioo. Let the fame pipe be elevated to 20 degrees in the quadrant ; and if it be kept full of water, park of that water will run into the pipe AB, and rife therein to the height A i>. which ,is equal to the length_ of the up¬ right line b 20, or to the fine of 20 degrees elevation ; which, being meafured upon the fcale S, will be 34.2 HYDROSTATICS. 17 35 5* 70 87 104' 122 139 156 j74 191 208 225 242 259 276 292 Z°9 325 342 358 375 39l 407 423 438 454 469 485 500 D.3. S2 33 34 35 36 37 38 39 40 41 42 43 44' 45 46 47 48 49 5° 51 52 53 54 55 56 57 58 59 60 5'5 530 545 559 573 588 602 616 629 648 656 669 682 695 707 719 73i 743 755 766 777 788 799 809 819 829 839 84.8 857 865 875 883 891 899 906 913 920 927 934 940 945 95i 956 961 966 970 974 978 982 985 988 990 992 994 996 997 998 999 1000 of fuch parts as the pipe contains 100 in length. ®^cau^"e mayJ,e ufe to have the lengths of all And therefore, the prefTure of the water at A, in the .f Hf1fS r 3 ^ J3n* ro51 0 degrees to 90, we have , . „ .5. . . „ ... . mven the roreo-oino-raKip./hr>,,„n>T f t, * . ---- - ^ lu yu, we nave given the foregoing Fable, ftiowihg the length of the fine were raifed to the perpendicular fituatien AB, as 34*2 ofever>’ degree in fuch parts as the whole pipe (equal to ,QO> 3 to the radius of the quadrant) contains tooo. Then Elevate tire pipe to the pofition A 30 on the qua- y!16, int^gra^ or whole parts in length, drant, and if it be fupplied with water, the water But if you _ fuppofe the length of the pipe to be di- will rife from it, into the pipe AB, to the height A /, V‘df °n^ lnt0 ‘ ^ ^ ^ figure of each or to the fame level with the mouth of the pipe at 30. ffrr°r , mU • e cu.t fs,a decimal; and then The fine of this elevation, or of the angle of 30 de- th°f? W.hich r"ma,n at,the kh hand of this feparation grees, is r 30; which is juft equal to half the length of W1 rp,e ^ or ^ °^e Parts. the pipe, or to 50 of fuch parts of the feale as the , US>, 1 1 « radius of the quadrant (fuppofed to kngth of the pipe contains 100. Therefore, the pref- . e eclua 0 e ength of the pipe AC) be divided fure of the water at A, in a pipe elevated 30 degrees 10 ° I0P0 5^ua Pa^ts> aud the elevation be 45 de- above the horizontal level, will be equal to one half r 6 ^ Z t-r1 , vatl°n w‘d be equal to 707 of what it would, be if the fame pipe flood upright ° e e far 3 ' t^e radlus he divided only into • ■ .t--r. • _ a tj rr r & 100 equal parts, the fame fine will he nr,* 100 equal parts, the fame fine will be only 70.7 c.. 7PtV of thefe parts. For, as 1000-is to 707, fo is 100 to 70.7. As it is of great importance to all engine-makers. in the fituatiort AB And thus, by elevating the pipe to 40, 50,.60, 70,, and 8o" degrees on the quadrant, the fines of thefe elevations will be d 40, e 50, f 60, g.^o, and 80 ; which will be equal to the heights Am, An, Ao, . , . - . • -o— Ap, and Aq; and thefe heights meafured upon the ° n.°W, . at PuanUty and weight of water will be feale S will be 64.3, 76.6, 86.6. 94.0, and 98.5; co"tam.ed in an upright round pipe of a given diameter which exprefs the prefibres at A in all thefe eleva- ancir jC1ght 5 fo as> b>' k!.)OW’‘ug what weight is to be tions, confidering the preffure in the upright pipe AB ra'ie272.35 1484.40 1696.46 1908.52 2120.58 424r->5 Weight in troy ounces. 11.19 22.38 33-57 44.76 55-95 67.15 78.34 89-53 100.72 111.91 223.82 335-73 447.64 559-55 671.46 783-37 895.28 1007.19 1119.09 38->8 In avoir- dupoife ounces. 12.29 24.58 36.87 49.16 61.45 73-73 86.02 98.31 110.60 122.89 245.78 368.68 49,-57 614.46 737-35 860.24 983.14 106.03 1228.92 2457-84 Seft.V. HydroftatiC Tables. HYDRO- iSea.V. HYDROSTATI CS. HYDROSTATICAL TABLES. 2 Inches diameter. Solidity in cubic inches. Weight in troy ounces. 37-70 75.40 113.10 150.80 188.50 226.19 263.89 3OI-59 339-29 376.99 753-9* (130.97 1507.97 1884.96 2261.95 2638.94 3015-93 3392-92 3769.91 7539-*2 19.89 39-79 59.68 79.58 99-47 ”9-37 139.26 159.16 179.06 198.95 397-90 596.85 795.80 994-75 ii93-7o 1392.65 1591.60 1790.56 1989.51 3979-QO In avoir¬ dupois ounces. 2».8S 43-69 65.54 *7-39 109.24 131.08 152-93 174-78 196.63 218.47 436.95 665.42 873.90 1092.37 1310.85 1529.32 1747.80 1966.27 2184.75 4369-50 3 Inches diameter. Solidity in cubic inches. 84.8 169.6 254 5 239 3 424.1 508.9 533-7 698.6 763-4 848.2 1696.5 2244.7 3392.9 4241.1 5089.4 5937-6 6785.8 7634-1 8482.3 16964.6 Weight in troy ounces. 44-76 89-53 134.29 179.06 223.82 268.58 3I3-35 358.. 1 402.87 447.64 895.28 1342.92 1790.56 2238.19 2685.83 3*33-47 3581.11 4028.75 4476.39 8952.78 In avoir¬ dupois ounces. 49.16 98.31 *47-47 196.63 245.78 294.94 344.10 393-25 442.41 49*-57 9*3-*4 1474.70 1966.27 2457.84 2949.41 3440.98 3932.55 4424.12 49*5-68 983^36 23 HydrofU Tablet 24 Inches diameter. Solidity in cubic inches. 58.90 117.81 176.71 235.62 294.52 353-43 4*2-33 47 *-24 530.14 589.05 1178.10 1767.15 2356.20 2545.25 3534-29 4123.34 4712.39 5301.44 5890.49 11780.98 Weight in troy ounces. 3 *.08 62.17 93.26 124.34 *55-43 186.52 217.60 248.69 279-77 310.86 621.72 932.58 1243.44 *554-30 1865.16 2176.02 2797.74 3108.60 6217.20 In avoir¬ dupois ounces. 34? *4 6S.27 102.41 *36.55 170.68 204.82 238.96 273.09 307.23 34*-37 682.73 1024.10 *365-47 1706.83 2048.20 2389.57 273094 3072.30 2413.67 4827-34 3^ Inches diameter. Solidity in cubic inches. 115.4 230.9 346-4 461.8 577-3 692.7 808.2 923.6 1039.1 1154.5 2309.1 3463-6 4618.1 5772-7 6927.2 8081.7 9236.3 10390.8 IT 545.4 23090.7 Weight in troy ounces. 60.9 121.8 182.8 243-7 304.6 365.6 426.5 487.4 548.3 609.3 1218.6 1827.9 2437-* 3046.4 3655-7 4265.0 4874-3 5483.6 6092.0 *2185-7 In avoir¬ dupois ounces. 66.9 *33-8 200.7 267.6 334-5 401.4 468.4 535-3 602.2 669.1 *338.2 2007.2 2676.3 3345-4 4014.5 4683.6 535,2-6 6021.7 6690.8 ‘338*-5 HYDRO* 24 • llydroftf-tic HYDROSTATICS. II Y D R O S T A T I C A L TABLES. Sea. V. 4 Inches diameter. Solidity- in cubic inches. 150.8 3°i.6 452-4 <503.2 754.0 904.8 7 1055.6 8 | 1206.4 9 | 1557-2 to I 1508.0 20 j 3115.9 3° I 4523-9 40 , 6631.9 5° | 7539-8 60 | 9047.8 70 10555.8 80 ; 12063.7 90 13571-7 too 15079.7 200 30159.3 Weight in troy ounces. 79.6 159-2 238.7 3l8-3 397-9 477-5 557-1 636.6 716.2 795-8 1591.6 2387-4 3l83-2 3997.0 4774.8 5570-6 6266.4 7162.2 7958.0 15916.0 In avoir¬ dupois ounces. 87.4 174.8 262.2 349-6 436'9 524.3 611.7 699.1 786.5 873-9 1747.8 2621.7 3495-6 4369 5 5243-4 6117.3 6991.2 7865.1 8739.0 i7478-o 5 Inches diameter. 80 90 too 2CO Solidity in cubic inches. 235.6 471. 706.8 942.5 1178. I4I3-7 i649-3 1884.9 2120.' 2356. 4712.4 7068.6 9424 8 11780.0 14137.2 16493.4 18849.6 21 205.8 23562.O 47124-0 Weight in troy ounces. 124.3 248.7 373-o 497-4 621.7 In avoir¬ dupois ounces. 8704 1 9947-5 11191.0 12434.4 24868.8 j36-5 273.1 409.6 546.2 682.7 819.3 955.8 1092.4 x 228.9 2365-5 2730-9 4096.4 5461.9 6827.3 8192.6 9558-3 10923.7 12289.2 13654-7 2 7 309-3 44 Inches diameter. Solidity in cubic inches. 190.8 381.7 572.6 763-4 954 3 1145.1 1337-9 1526.8 1717.7 1908.5 3817.0 5725.6 7634-‘ 9542.6 11451.1 13359-6 15268.2 17176.7 19085.2 38170.J. Weight in troy ounces. ico.7 201.4 302.2 402.9 503.6 604.3 705.0 805.7 906.5 1007.2 2014.4 3021.6 4028.7 5035-9 6043.1 7050.3 8057.5 9064.7 10071.9 2Q143-8 In avoir¬ dupois ounces. 110.6 22 1.2 33'-8 442.4 453-0 663.6 774-2 884.8 995-4 ■i 106.0 2212.1 38.8.1 4424.1 5530.1 6636.2 7742.2 8848.2 9954-3 11060 3 22X20.6 54 Inches diameter. .30 40 50 60 1 70 8° 90 ioo ■ 200- Solidity in cubic inches. 285.1 570.2 855-3 1140.4 1425.5 1710.6 1995.7 2280.8 2565.9 2851.0 5702.0 8553-° 11404 o 142550 17x06.0 19957.0 22808.0 25659.0 Weight in troy ounces. 150.5 300.9 451-4 (xm.8 752-3 902.7 .053.2 1203.6 1354 1 1504.6 3009.1 4513-7 6018.2 7522.8 9027.4 10531.9 12036.5 1354l 29510.0 .15045.6 In avoir¬ dupois ounces. 164.3 328-3 492.8 657.1 8i> 3 985.6 1149.9 1314-2 '478.4 1642.7 3255.4 4928.1 6570.8 82.3.5 9856.2 X149S.9 l3‘4’ -6 x 4784.3 16426.9 >.o I-30091.2 i 32853, HYDR®* HYDROSTATICS. 25 HYDRO STATICAL TABLES. 6 Inches diameter. Solidity- in cubic inches. 339-3 678.6 1017.9 »3S7-2 1696.5 2035-7 2375-o 2714-3 3053-6 3392.9 6785.8 10178.8 13571-7 16964.6 20357.5 23750-5 27'43-4 30536.3 3392.92 67858.4 Weight in troy ounces. 179 358 537 7x6 895 1074 1253 >432 16 1790 358i 5371 7162 8952 >0743 12533 14324 16115 17905 358i In avoir¬ dupois ounces. 1966 393-3 589.9 786.5 983.1 XI79.8 >376.4 >573-0 1769.6 1966.3 3932-5 5898.8 7865.1 9831.4 11797.6 >3763-9 15730.2 17696.5 19662.7 39325-4 6y Inches diameter. 70 80 90 100 JOO Solidity in cubic inches. 398.2 797-4 1195.6 >593-8 >991.9 2390.1 2788.3 3186.5 3584-7 3982.9 7965.8 11948.8 >5931.7 199.4.6 23897.6 27880.5 31863.4 35846.3 39829.3 79658.6 Weight in troy ounces. 420.3 630.4 840.6 1050.8 1260.9 1471.1 1681.2 1891.3 2101.5 4202.9 6304.4 8405.9 10507.4 12608.9 147x0.4 16811.8 >8913-3 21014.8 42029.6 In avoir¬ dupois ounces. 230.7 461.4 692.1 922.8 1153.6 1384.3 1615.0 1845.7 2076.4 2307.1 4614.3 6921.4 1 9228.6 >'535-7 13842.9 16150.0 18457.2 20764.3 23071.5 46143-° Under the article SrEjM-Engine, the reader will find Hydraulic a particular account of that ufeful invention, with a £ngine» t corredt defcription and plate of it in its improved (late. ^ The multiplying machine, has no dependence on the Steam- aftion of the atmofphere ; but, by the weight of wa- engine, ter only, and without pump-work of any kind, raifes 37 water fufficient to ferve a gentleman's feat, with an overplus for fountains, fiih-ponds, &c. tcr by a AB are two copper pans or buckets of unequal multiplying weight and fize, fufpended to chains, which alternately wheel- wind off and on the multiplying-wheel YZ; whereof the wheel Y is fmaller in diameter, and Z larger, in fig $t proportion to the different lifts each is defigned to per¬ form. When the buckets are empty, they are flopped le¬ vel with the fpring at X, whence they are both filled with water in the fame time. The greater of the two, A, being the heavier when full, preponderates and defcends ten feet, perhaps from C to D ; and the leffer, B, depending on the fame axis, is thereby weighed up or railed from E to F, fuppofe 30 feet. Here, by particular little contrivances, opening the valves placed at bottom of each of thefe buckets, they both difcharge their water in the fame time, through apertures proportionable to their capacities; the fmall¬ er into the ciftern W, whence it is conveyed for fer- vice by the pipe T, and the larger at D, to run wafte by the drain below at H. The bucket B being emp¬ ty, is fo adjufted as then to overweigh; and defcending fteadily as it rofe betwixt the guiding rods VV, brings or weighs up A to its former level at X, where both being again replenilhed from the fpring, they thence proceed as before. And thus will they continue con- ftantly moving (merely by their circumftantial differ¬ ence of water-weight, and without any other affiftance than that of fometimes giving the iron-work a little oil) fo long as the materials ihall laft, or the fpring fupply water. The fteadinefs of the motion is in part regulated by a worm turning a jack-fly, and a little Ample wheel- work at LM; which communicating with the multi¬ plying wheel axle at M, is thereby moved forward or backward as the buckets either rife or defcend. But what principally keeps the whole movement fteady, is the equilibrium preferved in the whole operation by a certain weight of lead, at the end of a lever of fit length, and fixed on one of the fpindles of the wheel- work, the numbers whereof are fo calculated as, du¬ ring the whole performance up and down, to let it move no more than one-fourth of a circle, from G to K 5 by which contrivance, as more or lefs of the chains fufpending the buckets come to be wound off their refpeclive wheels Y and Z, this weight gradu¬ ally falls in as a counterbalance, and fo continues the motion equable and eafy in all its parts. The water wafted by this machine is not above the hundredth part of what a water-wheel will expend, to raife an equal quantity. But where a fall, propor¬ tionable to the intended rife of water, cannot be had, with a convenient fewer to carry off the wafte water over and above, this device cannot be well put in prac¬ tice. 3s Water may alfo be railed by means of a ftream AB The Per- turning a wheel CDE, according to the order of thelianwhee^ D let- Vol. IX. Part I. 26 HYDROS Hydraulic letters, with buckets a, a, a, a, 8cc huncr upon the , E:isrll1<;-ti | wheel by ftrong pins b, b, b b, tkc. fixed in the fide pjatt, of :he rim : bm the wheel mull be made as high as CCXLl the water is intended to be raifed above the level of fig-S. that part of the dream in which the wheel is placed. As the wheel turns, the buckets on the right hand go down into the water, and are thereby filled, and go up full on the ieft hand, until they come to the top at K, where they ftrike againft the end n of the fixed trough M, and are thereby overfet, and empty the water into the trough ; from which it may be conveyed in pipes to the place which it is defigned for : and as each bucket gets over the trough, it falls into a perpendi¬ cular pofition again, and goes dawn empty, until it comes to the water at A, where it is filled as before. On each bucket is a fpring r, which, going over the top or crown of the bar w, (fixed to the trough'M), raifes the bottom of the bucket above the level of its mouth, and fo caufes it to empty all its water intoNthe trough. Sometimes this wheel is made to raife water no higher than its axis ; and then, inftead1 of buckets hung upon it, its fpokes, C, d, e,f, g, h, are made of a bent form, and hollow within; thefe hollows opening into the holes C, D, E, F, in the outfide of ' the wheel, and alfo into thofe at O in the box N up¬ on the axis. So that as the holes CD, &c. dip into the water, it runs into them; and as the wheel turns, the water rifes in the hollow fpokes c d, &c. and runs out in a ftream P from the holes at O, and falls into the trough Q^from whence it is conveyed by pipes. And this is a very eafy way of raifing water, becaufe 39 the engine requires neither men nor horfes to turn it. Fire-en- Engines for extiriguifhing fire are either forcing or gi..es. lifting pumps; and being made to raife water with great velocity, their execution in great meafure de¬ pends upon the length of their levers, and the force Plate wherewith they are wrought. CCXLII. For example, AB is the common fquirting fire- 5* engine. D C is the frame of a lifting-pump, wrought by the levers E and F a&ing always together Du¬ ring the ftroke, the quantity of water raifed by the pif- ton N fpouts with force through the pipe G, made capable of any degree of elevation by means of the yielding leather-pipe H, or by a ball and focket, ca¬ pable of turning every way, fcrewed on the top of the pump. Between the ftrokes on this machine the fiream is difcontinued. The engine is fupplied by wa¬ ter poured in with buckets above ; the dirt and filth whereof are kept from choaking the pump work by help of the. (trainer IK. A confiderable improvement has fince been made to thefe machines, in order to keep them difcharging a continual ftream. In doing whereof it is not to be underftood that they really throw out more water than do the fquirting ones of the fame fize and dimenfions with themfelves ; but that the velocity of the water, and of courfe the friftion of all the parts, being lefs violent, the ftream is more even and manageable, and may be dire&ed hither or thither with greater eafe and certainty than if it came forth only by fits and ftarts: The machine, thus improved, is therefore ge¬ nerally better adapted to the purpofe intended than the former, efpecially in the beginning of thefe cala¬ mitous accidents. T A T I C S. Sea.V. The ftream is made continual from the fpring of air Hydraulic confined in a ftrong. metal vefiel CC, in the fire engine i Engine?. ^ AB, fixed between the two forcing-pumps D and E, p|~"tev wrought with a common double lever FG moving on CCLXII. the centre H. The piftonsin D and E both fuck and.fig. 6. force alternately, and are here reprefented in their dif¬ ferent adlions; as are alfo the refpe&ive valves at IK and LM. The water to fupply this engine, if there be no op¬ portunity of putting the end of a fucking-pipe, oc- cafionally to be fcrewed on, into a moat or canal, which would fpare much hurry and labour in cafe of fire, is alfo poured into, the vefiel AB ; and being (trained through the wire grate N, is, by the preffure of the atmofphere, raifed through the valves K and M into the barrels of D or E, when either of their forcers afcend; whence again it will be powerfully pufhed when they defcend into the air-veflel CC, through the valves I and L by turns: by the force whereof the. common air between the water and the top of the air- veflel O will from time to time be forcibly crowded into lefs room, and much comprefled; and the air being a body naturally endowed with a ftrong and lively fpring, and always endeavouring to dilate itfelf every way alike in fucha circumftance, bears ftrongly both againft the fides.of the veflel wherein ic is confi¬ ned, and the furface of the water thus injedfed; and fo makes a conftant regular ftream to rife through the metal pipe P into the leather one Q, fcrewed thereon ; which being flexible, may be led about into rooms and entries, as the cafe may require. Should the air contained in this veflel be comprefled into half the fpace it took up in its natural ftate, the fpring thereof will be much about doubled ; and as before it equalled and was able to fuftain the preffure of a fingle atmofphere, it having now a double force* by the power of that fpring alone will throw water into air, of the common degree of denfity, about thirty feet high. Andftiould this compreffure be ftill augmented, and the quantity of air which at firft fill¬ ed the whole veffel be reduced into one-third of that * fpace, its fpring will be then able to refift, and confe- quently to raife the weight of a treble atmofphere ; in which cafe, it will throw up a jet of water fixty feet high. And (hould fo much water again be forced in* to the veffel as to fill three parts of the capacity, it will be able to throw it up about ninety feet high: and wherever the fervice (hall require a ftill greater rife of water, more water muft be thruft into this vef¬ fel; and the air therein being thus driven by main force into a dill narrower compafs, at each cxplofion, the gradual reftitution thereof to its firft dimenfions is what regularly carries on the ftream between the ftrokes, and renders it continual during the operation of the machine. This experiment, in little, may be either made on the lifting or forcing pump, the nofels of which may be left large, on purpofe for the reception of the fmall pipe F, reaching nearly, to the valve at E, and occa- fionally to be fcrewed in. Between this pipe and the ' fides and top of the nofel H, a quantity of air will neceffarily be lodged, which, when the forcer adts, will be compreffed at every ftroke by the rife of the water; more whereof will be pufhed through E than can immediately get away, through the pipe F, which Sea. V. HYDROS Hydraulic is to be always lefs in diameter, than the opening of Engines. ^ valVe at E : the degree of which condenfation, and that of the reftitution to its natural ftate of den- fity, may be obferved through the glafs-machines, to 0 fatisfaftion. The {crew Archimedes’s screw is a fort of fpiral pump, and of Archi, receives its name from its inventor. It confifts of a long medess. cylinder AB with a hollow pipe CD round it; and is CCiXIlI place(l ’n an oblique pofition, with the lower end in the tg i. water, the other end being joined to the lower end of a the winch IK, fupported by the upright piece IR. When this fcrew is immerfed in the water, it imme¬ diately rifes in the pipe by the orifice C to a level with the furface of the water EF; and if the point in the fpi¬ ral, which in the beginning of the motion is coinci¬ dent with the furface of the water, happen not to be on the lower fide of the cylinder, the water, upon the motion of the fcrew, will move on in the fpiral till it come to the point on the other fide that is coincident with the water. When it arrives at that point, which we will fuppofe to be O, it cannot afterwards pofi'efs any other part of the fpiral than that on the lowed part of the cylinder: for it cannot move from O toward H or G, becaufe they are higher above the horizon; and as tin's will be conflantly the cafe after the water in the fpiral has attained the point O, it is plain it mud always be on the under fide of the cylinder. But becaufe the cylinder is in condant motion, every part of the fpiral fcrew, from O to D, will by de¬ grees fucceed to the under part of the cylinder. The water therefore mud fucceed to every part of it, from O to D, as it comes on the lower fide ; that is, it mud afcend on the lower part of the cylinder through all the length of the pipe, till it come to the orifice at D, where it mud run out, having nothing further to 41 fupport it. The ba- There is a Ample and eafy method of working two lance- pumps at once, by means of the balance AB, having pumps. a jarge ;ron ban at each end, and placed in equilibrium 3’ 4‘ on the two fpindles C, as reprefented in the 6th fi¬ gure. On the right and left are two boards I, nailed to two crofs pieces, fadened to the axis of the ma¬ chine. On tljefe boards the perfon who is to work the pump dands, and fupports himfelf by a crofs piece nailed to the two pods ED, fig. 5. At the didance of ten inches on each fide the axis are fadened the pidons MN. The man, by leaning alternately on his right and left foot, puts the balance in motion, by which the pumps OP are worked, and the water thrown into the pipe H, and carried to a height proportional to the diameter of the valves and the force of the balance. There mud be placed on each fide an iron fpring, as F and G, to return the balance, and prevent its ac- 42 quiring too great velocity.' The chain- The Chain-pump, A B, is ordinarily made from pump. twelve to twenty-four feet long ; and confids of two CCXIII collateral fquare barrels, and a chain of pidons of the % 4/ ' fame form, fixed at proper didances thereon. The chain is moved in thefe round a coarfe kind of wheel- work at either end of the machine, the teeth whereof are fo made as to receive one half of the fiat pidons, and let them fold in ; and they take hold of the links as they rife in one of the barrels, and return by the other. The machine is wrought either by the turning T A T I C S. 27 of one handle or two, according to the labour requi- Entertain- red, depending on the height to which the water is to be railed. A whole row of the pidons (which go * free of the fides of the barrel by perhaps a quarter of an inch) are always lifting when the purpp is at wmrk; yet do they, by the general pufh in the ordinary way of working, as it is pretty brifk, coshmonly bring up a full bore of water in the pump. This machine is fo contrived, that, by the continual folding in of the pidons, dones, dirt, and whatever happens to come in the way, may alfo be cleared ; and therefore it is generally made ufe of to drain ponds, to empty few- ers, and remove foul waters, in which no other pump could work. 4? The lad machine to be defcribed confids of five The hy. pieces of board, forming a fort of fcoop, as B. The!?raillic handle C is fufpended by a rope fadened to three poles, placed in a triangle, and tied together at A. CCXLIir, The working of this machine confids entirely infig-*' balancing the fcoop that contains the water, and di¬ recting it in fuch manner that the water may be thrown in any given direction. It is evident that the opera¬ tion of this machine is fo very eafy, that it may rather be confidered as an agreeable and falutary recreation than hard labour. With this machine a man of moderate drength, by two drokes in four feconds, can draw half a cubic foot of water, that is, more than four hundred cubic feet in an hour. This machine is frequently ufed by the Dutch in emptying the water from their dikes. Sect. VI. Entertaining Experiments. 44 1. Several amufing appearances may be-produced by difguiiing or diverfifying a fyphon. It may, for^"d *f' example, be difguifed in a cup, from which no liquor Tantalus’s will flow till the duid is railed therein to a certain cup, &c. height; but when the efflux is once begun, it will continue till the vefiel is emptied. Thus, fig. 11. is a Plate cup, in the centre whereof is fixed a glafs pipe A,CCXXXIX’ continued through the bottom at B, over which is put another glafs tube, made air-tight at top by means of the cork at C ; but left fo open at foot, by holes made at D, that the water may freely rife between the tubes as the cup is filled. Till the fluid in the cup fhall have gained the top of the inrnod pipe at A, no motion will appear. The air however from between the two pipes being in the mean time extruded, by the rife of the denfer fluid, and palling down the inner tube, will get away at bottom ; and the water, as foon as the top of the inclofed tube fhall be covered thereby, will very foon follow, and continue to rife in this machine, as in the fyphon, till the whole is i;un off. This is called by fome, a Tantalus's cup ; and, to humour the thought, a hollow figure is fometimes put over the inner tube, of fuch a length, that when the fluid is got nearly up to.the lips of the man, the fyphon may begin to a effect jet the fame metal. Let there be a cock at H, which mutt^ fau’ be made fo tight that ne air can pafs by it. .The pipe-1*’' lZ BE mull go very near the bottom of the veflel, but- no*. 30 HYDROS The n vel'ous vef- i fel, fig. i Entertain- not touch it. There muft be another pipe F, at whofe ingexpeti- ext;reniity G there is a very fmall hole: this pipe mult ment^ be ferewed into the former. '' v The veflel being thus difpofed, take a good fyringe; and placing the end of it in the hole at G, open the cock, and force the air into the veflel ; then turn the cock and take out the fyringe. Repeat this operation feveral times, till the air in the veffel be Itrongly con- denfed. Then fill the fyringe with water, and force it into the veflel, in the fame manner as you did the air ; and repeat this operation till you can force no more water into the vefi'el; then flint the cock. This veffel will be always ready to perform an extempore jet d’eau : for, on turning the cock, the fpring of the comprefled air will force out the water with great violence, and the jet will continue, though conilantly decreafing in force, till the water is all exhiufted, or the air with¬ in the vefi'el is come to the fame denfity with that o . without. 14. Let there be made a tin veflel, about fix inches * high, and three inches in diameter. The mouth of this veffel muft be only one quarter of an inch wide; and in its bottom make a great number of fmall holes about the fize of a common fewing needle. Plunge this veffel in water, with its mouth open ; and when it is full, cork it up and take it out of the water. So long as the veffel remains corked, no water what¬ ever will come out; but as foon as it is uncorked, the water will iffue out from the fmall holes at its bottom. You muft obferve, that if the holes at its bottom of the veffel be more than one fixth of an inch diame¬ ter, or if they be in too great number, the water will run out though the veffel be corked ; for then the pref- fure of the air againft the bottom of the veffel will not j8 be fufficient to confine the water. A glafs full An experiment fimilar to this is made with a glafs ''f filled with water, over which a piece of paper is placed. ^ The glafs is then inverted ; and the water, by the preffure of the air under it, will remain in the glafs. That the paper, though the feeming, is not'the real, fupport of the water, will appear from n° 25. 15. In this fountain, the air being compreffed by latlng foun- the concealed fall of water, makes a jet, which, after fame continuance, is confidered by the ignorant as a perpetual motion; becaufe they imagine that the fame water which fell from the jet arifes again. The boxes CE and DYX being clofe, we fee only the bafon ABW, with a hole at W, into which the water fpout- ing at B falls ; but that water does not come up again; for it runs down through the pipe WX into the box DYX, from whence it drives out the air through the afeending pipe YZ, into the cavity' of the box CE, where, preffmg upon the water that is in it, it forces it but through the fpouting pipe OB, as long as there is any water in CE ; fo that this whole play is only whilft the water contained in CE, having fpouted out, falls down through the pipe WX into the cavity DYX. The force of the jet is proportionable to the height of the pipe WX, or of the boxes CE and DY above one another : the height of the water, meafured from the bafon ABW to the furface of the water in the lower box DYX, is always equal to the height meafured from the top of the jet to the furface of the water in the middle cavity at CE. Now, fince the furface CE ts always falling, and the v/ater in DY always rifing, cf water inverted, and the w ter not fpiit, %• IS- 59 The c Plate CCXLV. fig- 4. T A T I C S. Sea.V!, the height of the jet muft continually decreafe, till it E^es-'auv. is fhorter by the height of the depth of the cavity CE, which is emptying, added to the depth of the cavity , - 1 DY, which is always filling ; and when the jet is fal¬ len fo low, it immediately ceafes. The air is repre- fented by the points in thi$ figure. To prepare this fountain for playing, which fhould be done unobferved, pour in water at W, till the cavity DXY is filled; then invert the fountain, and the water will run' from the cavity DXY into the cavity CE, which may be known to be full, when the water runs out at B held down. Set the fountain up again, and, in order to make it play, pour in about a pint of water into the bafon A BW; and as foon as it has filled the pipe WX, it will begin to play, and continue as long as there is any water in CE. You may then pour back the water left in the bafon ABW, into any veffel, and invert the fountain, which, being fet upright again, will be made to play, by putting back the water poured out into ABW ; and fo on as often as you pleafe. The fountain fig. 3. is of the fame kind; but ha¬ ving double the number of pipes and concealed cavi¬ ties, it plays as high again. In order to underftand its ftrudlure, fee fig. 7. The bafon is A, the four cavi¬ ties are B, C, D, and E, from which the water through the pipe f G fpouts up to double the height of the fountain, the air at E, which drives it, being doubly condenfed. The water going down the pipe 1 (r. gr. three feet long), condenfes the air that goes up into the cavity C through the pipe z, fo as to make it ftronger than the common air; then the water, which falling in the pipe 3 from C to D, is capable, by the height of its fall, of condenfing the air at E, fo as to make it ftronger, being pulhed at C by air already condenfed into lefs fpace, caufes the air at E to be condenfed twice as much ; that is, to be j- ftronger than commqn air ; and therefore it will make the wa¬ ter at G fpout out with twice the force, and rife twice as high as it would do if the fountain had been of the fame ftru&ure with the former. In playing this fountain turn it upfide down, and taking out the plugs g, h, fill the two cavities C and E, and having (hut the holes again, fet the fountain upright, and pour feme water into the bafon A, and the jet will play out at G; but the fountain will begin to play too foon, and there¬ fore the beft way is to have a cock in the pipe 3, which, being open, whilft the cavities C and E are filled, and fhut again before the fountain is fet up, will keep the water thrown into the bafon from going down the pipe 1, and that of the cavity C from going down the pipe 3, by which means the fountain will not play before its time, which will be as foon as the cock is opened. go 16. Procure a tin veffel ABC, five inches high andThemagl- fbur in diameter ; and let it be clofed at top. To the cal cafcade, bottom of this veffel let there Ke foldered the pipe DE, %• 5* of ten inches length, and half aa inch in diameter: this pipe muft be open at each end, and the upper end muft be above the water in the veffel. To the bottom alfo fix five or fix fmall tubes F, about one-eighth of an inch diameter. By thefe pipes the-Water contained in the veffel is to run flovvly out. Place this machine on a fort of tin bafon GH, in the middle of which is a hole of one quarter of an inch $ diameter. Sea. VI. HYDROS Entertain- diameter. To this tube DE, fix fome pieces that may mg expert- fUpp0rt the vefiV.l over the bafon ; and obferve that the end D, of the tube DE, rnuil be little more than one : quarter of an inch from the bafon. There muft be alfo another veffel placed under the bafon, to receive the water that runs from it. Now, the fmall pipes difcharging more water into the bafon than can run out at the hole in its centre, the water will rife in the bafon, above the lower end of the pipe DE, and prevent the air from getting into the veffel AB ; and confequently the water will ceafe to flow from the fmall pipes. But the water continuing to flow from the bafon, the air will have liberty again to enter the veffel AB, by the tube DE, and the water will again flow from the fmall pipes. Thus they will alternately flop and flow as long as any water remains in the veffel AB. As you will eafily know, by obferving the rife of the water, when the pipes will ceafe to flow, and by the fall of it, when they will begin to run again, you may fafely prediA the change ; or you may command them to run or flop, and they will feem to obey your gj orders. The illumi- 17. This fountain begins to play when certain can- nated foun- dies placed round it are lighted, and flops when thofe Plate candles are extinguifhed. It is conftrufted as follows. CCXLIII Provide two cylindrical veffels, AB and CD. Con¬ ig. p. nedt them by tubes open at both ends, as HE, FB, Sea fo that the air may defeend out of the higher into the lower veffel. To thefe tubes fix candlefticks H, See. and to the hollow cover CF, of the lower veffel, fit a fmall tube EF, furnifiied with a cock G, and reaching almoft to the bottom of the veffel. In G let there be an aperture with a ferew, whereby water may be poured into CD. Now, the candles at H, See. being lighted, the air in the contiguous pipes will be thereby rarified, and the jet from the fmall tube EF will begin to play : as the air becomes more ratified, the force of the jet will increafe, and it will continue to play till the water in the lower veffel is exhaufted. It is evident, that as the motion of the jet is caufed by the heat of the candles, if they be extinguiftied, tbe fountain mull prefently The folar fountain. Plate CCXLV.. %• 8. 18. This fountain is contrived to play by the fpring of the air, increafed by the heat of the fun, and ferves alfo for a dial at the fame time. GNS is a hollow globe of thin copper, eighteen inches in diameter, fup- ported by a fmall inverted bafon, refting on a frame ABC, v/ith four legs, between which there is a large bafon of iwo feet diameter- In the leg C there is a concealed pipe, proceeding from G, the bottom of.the infide of the globe, along HV, and joining an upright pipe « I, for making a jet at I. 1 he fhort pipe la, going to the bottom of the bafon, has a valve at a un¬ der the horizontal part HV, and another valve at V T A T I C S. y above it, and under the cock, Sc. At the north pole^ntertain- N, there is a ferew for opening a hole, through whichin!?eJ£Feri" the globe is fupplied with water. When the globe is ment^ f half filled, let the machine be fet in a garden, and as the fun heats the copper and ratifies the included air, the air will prefs upon the water, which, defeending through the pipe GCHV, will lift up the valve V, and ftiut the valve «, and the cock being 'open, fpout out at I, and continue to do fo for a long time if the fun fhines, and the adjutage be fmall. At night, as the air condenfes again by the cold, the outward air preffing into the adjutage I, will flrut the valve V, but by its preffure on the bafon D«H, puflr up the water which has been played in the day-time through the valve «, and the pipe wHG into the globe, fo as to fill it up again to the fame height which it had at firft, and the next fun-fliine will caufe the fountain to play again, &c. . The ufe of the cock is to keep the fountain from playing till you think proper : a fmall jet will play fix or eight hours. If the globe be fet to the latitude of the place, and redified before it be fixed, with the hour-lines or me¬ ridians drawn upon it, the hours marked, and the countries painted, as on the common globe, it will form a good dial: the fun then fliining upon the fame places in this globe as it does on the earth itfelf. This fountain was invented by Dr Defaguliers. 63 19. There is a pretty contrivance, by which the fpe-T!le ^7*. cific gravity of the body is fo altered, that it rifes anddraulic dl* finks in water at our pleafure. Let little images of men,Ver3' about an inch high, of coloured glafs, be befpoke at a glafs-houfe; and let them be made fo as to be hollow within, but fo as to have a fmall opening into this hol¬ low, either at the foie of the foot or dfewhere. Let them be fet afloat in a clear glafs phial of water, filled within about an inch of the mouth of the bottle ; then let the bottle have its mouth clofed with a bladder, clofely tied round its neck, fo as to let no air efcape one way or the other. The images' themfelves are nearly of the fame fpecific gravity with water, or ra¬ ther a little more light, and confequently float near the furface. Now when we prefs down the bladder, tied on at the top, into the mouth of the bottle, and thus prefs the air upon the furface of the water in the bottle; the water being preffed will force into the hollow of the image through the little opening: thus the air within the images will be prefled more clofely together, and being alfo more filled with water now than before, the images will become more heavy, and will confe¬ quently defeend to the bottom ; but, upon taking off the preffure from above, the air within them will again drive out the water, and they will rife to the fame heights as before. If the cavities in fome of the ima¬ ges be greater than thofe in others, they will rife and: fall differently, which makes the experiment more amufing, H Y D HYDROTHORAX, a colleftion of water in the breafi. See (the Index fubjoined to) Medicine. HYDRUNTUM, (anc. geog.), a noble and com¬ modious port of Calabria, from which there was a ftior- ter paffage to Apollonia (Pliny.) Famous for its an- H Y D tiquity, and for the fidelity and bravery of its inhabi¬ tants. Now Otranto, a city of Naples, at the entrance of the Gulf of Venice. E. Long. 190 15'. N. Lat. 40° i'd. HYEMANTES, (in the primitive church), offen¬ ders H Y G r 32 1 H Y G 'Hygeia derj who had been guilty of fuch enormities, that they il were not allowed to enter the porch of the churches w‘t^1 lhe other penitents, but were obliged to ftand u—-y—j without, expo fed to all the inclemency of the wea¬ ther. HYGE1A, in mythology. See Health. HYGIEINE, Tytuv”, formed of uyinr, “ found, healthy,” that branch of medicine which confiders health, and difcovers proper means and remedies, with their ufe, in the prefervation of that date. The obje&s of this branch of medicine are, the non¬ naturals. See Diet, Exercise, &c. Hygieine, more largely taken, is divided into three parts; prophyla&ice, which forefees and pre¬ vents difeafes; fynteritice, employed in preferving health ; and analeptice, whofe office is to cure difeafes, and reftore health. HYGINUS (Caiusjulius), a grammarian, the freed- man of Auguftus, and the friend of Ovid, was born in Spain, or, according to others, in Alexandria. He wrote many books which are mentioned by ancient authors ; all of which are loft, except fome fables, and a work entitled AJlronomicon Poeticon; and even thefe are come down to us very imperfect. The beft edition of thefe remains is that of Munker, publifhed with fome other pieces of antiquity in 2 vols 8vd, 1681, un¬ der the title of Mytbographi Latinu HYGROMETER, an inftrument for meafuring the degrees of drynefs or moifture of the atmofphere, in like manner as the barometer and thermometer mea- fure its different degrees of gravity or warmth. Though every fubltance which fwells in moift, and ffirinks in dry weather, is capable of becoming an hy¬ grometer ; yet this kind of inftrument is far from be¬ ing as yet arrived at fuch a degree of perfection as the barometers and thermometers. There are three gene¬ ral principles on which hygrometers have been con- ftruCfed. 1. The lengthening and fhortening of firings by drynefs and moiflure, or their twilling and untwiil- ing by the fame. 2. The fwelling and fhrinking of folid fubftances by moifture or drynefs ; and, 3. By the increafe or decreafe of the weight of particular bo¬ dies whofe nature is to abforb the humidity of the at¬ mofphere. 1. On the firfl of thefe principles Mr Smeaton hath conftrudted an hygrometer greatly fuperior to any that had appeared before ; and of which the following ac¬ count is given in the 6ad volume of the Philofophical Tranfa&ions. “ Having fome years ago attempted to make an ac¬ curate and fenfible hygrometer by means of a hempen cord of a confiderable length, I quickly found, that, though it was more than Efficiently fufceptible of eve¬ ry change in the humidity of the atmofphere, yet the cord was upon the whole in a continual ftate of length¬ ening. Though this change was the greateft at firft, yet it did not appear probable that any given time would bring it to a certainty ; and, furthermore, it feemed, that as the cord grew more determinate in mean length, the alteration by certain differences of moifture grew lefs. Now, as on confidering wood, catgut, paper, &c. there did not appear to be a like¬ lihood of finding any fubftance Efficiently fenfible of differences of moillure that would be unalterable under the fame degrees thereof; this led me to coniider of a Nf 161. conflru&ion which would readily admit of an adjuft- HygromeJ ment; fo that, though the cord whereby the inflrument ter- ? is aftuated may be variable in itfelf, both as to abfa-' 'r~^t ’ lute length, and difference of length under given de¬ grees of moifture, yet that, on Eppofition of a mate¬ rial departure from its original fcale, it might be re- dily reftored thereto ; and, in confequence, that any number of hygrometers fimilarly conftrufted, might, like thermometers, be capable of fpeaking the fame language. “ The two points of heat the more readily deter¬ minable in a thermometer, are the points of freezing and boiling water. In like manner, to conflruft hy^ grometers which fhall be capable of agreement, it is neceffary to ellablifh two different degrees of a moi¬ flure which fhall be as fixed in themfelves, and to which we can have recourfe as readily and as often as poffible. “ One point is given by making the fubftance per- fe&Iy wet, which feems Efficiently determinable; the other is that of perfect dry, which I do not apprehend to be attainable with the fame precifion. A readinefs to imbibe wet, fo that the fubftance may be foon and fully faturated, and alfo a facility of parting with its moiflure on being expofed to the fire to dry ; at the fame time, that neither immerfion, nor a moderate ex- pofition to the warmth of the fire, fhall injure its tex¬ ture ; are properties requifite to the firll mover of fuch an hygrometer, that in a manner exclude all fubftances that I am acquainted with, befides hempen and flaxen threads and cords, or Ebflances compounded of them. “ Upon thefe ideas, in the year 1758, I conftrufted two hygrometers as nearly alike as poffible, in order that I might have the means of examining their agree¬ ment or difagreement on fimilar or diffimilar treat¬ ment. The interval or fcale between dry and wet I divided into too equal parts, which I call the degrees of this hygrometer. The point of o denotes perfefl dry; and the numbers increafe with the degrees of moifture to 100, which denotes perfeft wet. “ On comparing them for fome time, when hung up together in a paffage or flaircafe, where they would be very little affe&ed by fire, and where they would be expofed to as free an air as poffible in the irifide of the houfe, I found that they were generally within one degree, and very rarely differed two degrees; but as thefe comparifons neceffarily took up fome time, and were frequently interrupted by long avocations from home, it was fome years before I could form a tolerable judgment of them. One thing I foon obferved, not altogether to my liking, which was, that the flaxen cords made ufe of feemed to make fo much refiftance to the entry of fmall degrees of moiflure (Ech as is commonly experienced within doors in the fituation above mentioned), that all the changes were comprifed within the firll 30® of the fcale; but yet, on expofing them to the warm fleam of a wafh-houfe, the index quickly mounted to 100. I was therefore defirous of impregnating the cords with fomething of a faline na¬ ture, which fhould difpofe them more forcibly to at- traft moifture; in order that the index might, with the ordinary changes of the moifture in the atmofphere, tra¬ vel over a greater part of the fcale of 100. How to do this in a regular and fixed quantity, was the fubjedt of many experiments, and feveral years interrupted inquiry. AtlaftItried the one hereafter deferibed, which feemed 1 to Plate CC2LIV, Plate rOXLV. , r~/./3s/A'A,:„ /!„r. H Y G [ 33 J H Y G iHygrome' to anfwef my intention in a great meafure ; and tho’ , , tei'‘ , upon the whole it does not appear probable that ever F" < r this inftrinnent will be made capable of fuch an accu¬ rate agreement as the mercurial thermometers are, yet if we can reduce all the difagteements of an hygrome¬ ter within part of the whole fcale, it will pro- bisbiy be'6f ufe in fome philofophical inquiries, in lieu of inftrumehts which have not yet been reduced to any common fcale at all. I Plates “ Fig. i. and 2. ABC is an orthographic delinea- ICGXLVI. tion of the whole inftrument feen in front in its true ®tXLVH'proportion. DE is that of the profile, or inttru- -xnentfeen edgewife. FG in both reprefents a flaxen 1 cord about 35 inches long, fcfpendedby a turning peg F, and attached to a loop of brafs-wire at A, which .goes down into the box cover H, and defends the in¬ dex, &c. from injury; and by a glafs expofes the fcale to view. “ Fig. 3. fhows the inftrument to a larger fcale, the ■upright part being Ihortened, and the box-cover re¬ moved; in which the fame letters reprefent the fame parts as in the preceding figures; Cl are two loops or long links of brafs-wire, which lay hold of the in¬ dex KL, moveable upon a fmall ftud or centre K. The cord FG is kept moderately drained by a weight •M of about half a pound avoirdupois.—It is obvious, that, as the cord lengthens and fhortens, the extreme end of the index rifes and falls, and fuccefiively paffes over N a the fcale difpofed in the arch of a circle, and containing too equal divifions. This fcale is attached to the brafs Aiding ruler QP, which moves upon the •direfting piece RR, fixed by ferews to the board, which makes the frame or bafe of the whole ; and the fcale and ruler NQP is retained in any place nearer to or further from the centre K, as may be required by the ferew S. “ Fig. 4. reprefents in profile the Aiding piece and ftud I (fig. 3.), which traverfes upon that part of the index next the centre K; and which can, by the two ferews of the ftud, be retained upon any part of the index that is made parallel ; and which is done for three or four inches from the centre, for that purpofe. The ftud is filed to the edges, like the fulcrum of a feale-beam ; one being formed on the under fide, the ■other on the upper, and as near as may be to one another. An hook formed at the lower end of the \vire-loops Cl, retains the index, by the lowermoft edge of the ftud ; while the weight M hangs by a fmall hook upon the upper edge : by thefe means the index is kept fteady, and the cords {trained by the weight, with very little friction or burthen upon the central ftud K. “ Fig. 5. is a parallelogram of plate-brafs, to keep out dull, which is attached to the upper edge of the box-cover H; and ferves to Amt the part of the box- cover neceAarily cut away, to give leave for the wire GI to traverfe with the Aiding ftud nearer to or fur¬ ther from the centre of the index K; and where, in fig. 5. a is an hole of about an inch diameter, for the wire GI to pafs through in the rifing and falling of the index freely without touching ; 6 is a Ait of a ItlTer fize, fufficient to pafs the wire, and admit the cover to come off without deranging the cord or index ; ce are two fmall ferews applied to two Aits, by which the plate Aides length wavs, in order to adapt the hole a Vol. IX. Part I. ' to the wire Cl, at aiiy place of the llud I upbh the Hygrome- index KL. ter- “ 1. In this conftru&ion, the index KL being 12 Y ^ inches long, 4 inches from the extreme end are filed fo narrow in the direction in which it is feen by the eye, that any part of thefe four inches lying Over the divi¬ fions of the fcale, becomes an index thereto. The fcale itfelf Aides four inches, fo as to be brought under any part of the Four inches of the index attenuated as above- mentioned. “ 2. The pofition of the direfting piece RR is fo determined as to be parallel to a right line drawn thro* o upon the fcale, and the centre K of the index; con- fequently, as the attenuated part of the index forms a part of a radius or right line from the fame centre, it follows, that whenever the index points to o upon the fcale, thbugh the fcale is moved nearer to or further from the centre of the index, yet it produces no change in the place to which the index points. “ 3. When the divided arch of the fcale is at 10 inches from the centre (that is, at its mean diflance); then the ■centre of the arch and the centre of the index are coincident. At other diftances, the extremes of which are eight or twelve inches, the centre of the divifions, and the centre of the index pointing thereto, not be¬ ing coincident, the index cannot move over the fpaces geometrically proportionable to one another in all fi- tuations of the fcale ; yet the whole fcale not exceed¬ ing 30° of a circle, it will be found on computation, that the error can never be fo great as ,4^ part of the fcale, or i° of the hygrometer; which in this inftru¬ ment being confidered as indivifible, the mechanical error will not be fenfible. “ The cord here made ufe of is fiax, and between and TVth of an inch in diameter; which can be readily afeertained by meafuring a number of turns made round a pencil or fmall ftick. It is a fort of cord ufed in London for making nets, and is of that par¬ ticular kind called by net-makersJlaxen three-threads laid. A competent quantity of this cord was boiled in one pound avoirdupois of water, in which was put two pennyweights troy of common fait; the whole was reduced by boiling to fix ounces avoirdupois, which was dofie in about half an hour. As this afeer- tains a given ftrength of the brine, on taking out the cord, it may be fuppofed that every fibre of the cord is equally impregnated with fait. The cord being dried, it will be proper to ftretch it; which may be done fo as to prevent it from untwifting, by tying three or four yards to two nails againft a wall, in an horizontal pofition, and hanging a weight of a pound or two to the middle, fo as to make it form an obtnfe angle; This done fora week or more in a room, will lay the fibres of the cord clofe together, and prevent its ftretching fo faft after being applied to the in¬ ftrument as it would otherwife be apt to do. , “ The hygrometer is to be adjufted in the following manner. The box-cover being taken off to prevent its being fpoiled by the fire, and choofing a day natu¬ rally dry, fet the inftrument nearly upright, about a yard from a moderate fire ; fo that the cord may be¬ come dry, and the inftrument warm, but not fo near as would fpoil the fineft linen by too much heat, and yet fully evaporate the moifture; there let the inftru¬ ment flay till the index is got as low as it will go; E now Hygromc- H Y G [ 34 ] H Y G now and then ftroaking the cord betwixt the thumb and finger downwards, in order to lay the fibres there¬ of clofe together ; and thereby caufing it to lengthen as much as poffible. When the index is thus become llationary, which will generally happen in about an hour, more or lefs as the air is naturally more or kfs dry, by means of the peg at top raife or deprefs the index, till it lies over the point o. This done, remove the inftrument from the fire ; and having ready fome warm water in a tea cup, take a middling camel’s hair pencil, and, dipping it in the water, gently anoint the cord till it will drink up no more, and till the index becomes ftationary and water will have no more effe& upon it, which will alfo generally happen in about an hour. If in this ftate the index lies over the degree marked too, all is right : if not, flack the fcrew S, and Aide the fcale nearer to or further from the centre, till the point 100 comes under the ii}dex, and then the inftrument is adjufted for ufe : but if the compafs of the Aide is not fufficient to effeft this, as may proba¬ bly happen on the firft adjuftment, flack the proper fcrews, and move the Aiding ftud I nearer to or fur¬ ther from the centre of the index, according as the angle formed by the index between the two points of dry or wet happens to be too fmall or too large for the fcale.” On this principle, a fimple hygrometer has been made by Mr Coventry of Southwark, London. It is not upon the moft accurate conftru&ion, yet will aft very fenfibly in the common changes of the air. Fig. 6. reprefents the hygrometer as applied to a wall or board. A is a firing of whip-cord, catgut, &c. of any length at pleafure : it is fufpended on a bracket B, and kept extended by a weight at the bottom C. DD is a flip of wood, which with the bracket is fixed perpendicu¬ larly to a wall or fide of a room. It has a ftraight line E drawn down in the middle of the board, fer- ving to point out the divifions upon the edges of the two thin circular cards F and G. At the centre of the bottom of each of thefe cards is glued a piece of cork, through which the firing A is drawn: Thefe cork-pieces ferve to preferve the horizontal pofition of the cards. The upper card F is divided into 10 equal parts or divifions, and the under card G into 100 equal parts; the firing A being meafured into to equal paHs, from the point of fufpenfion H to the furface of tniTlow’er card I. The card F is hung at the firft part from H, and the card G at the roth part from the fame point : confequently, from the twilling and untwifting of the firing A by the different changes of the air, the lower card G, from the mechanical prin¬ ciples of motion, will defcribe 10 revolutions for one of the upper card F ; or, when the lower card G has made one revolution, the upper card F will have de- fcribed but the 10th part, or one of its divifions. From whence it appears, that by the afliftance of the upper card F, an index is thereby obtained of the num¬ ber of revolutions the lower card G performs, which are reckoned by the line E on the flip of wood. Example. It muft firll be obferved what divifion of the card F the line E is againft, fuppofe 3 and alfo what divifion of the lower card G is cut by the fame line, fuppofe xo : it then appears, that the ftate of the hygrometer is thus, 3 degrees and 1 o hundredths of another. If the.whole 10 divifions of the card F have paffed the line E, the lower card G will Hygrome- have revolved 1 o times, or x o hundred parts, equal to te^ 1000 ; the accuracy to which the principle of this' v fimple contrivance anfwers. Before ufe, the hygromo- ter ftiould be adjufted ; to do which, the cards F and G are firft fet to the line E at the o of each, or com¬ mencement of the graduations: whatever direftion the cards afterwards take, it muft evidently be from the change to greater moifture or drynefs in the air; and they'will accordingly point it out. On this principle, but with a degree of ingenuity and pains perhaps never before employed, an hygro¬ meter has been conftrufted by M. de Sauffure, pro- feffor of philofophy at Geneva. In. his Effais fur PHygrometrie, in 410, 1783, is an important detail on the fubjeft of hygrometry ; from which the following defcription of his hygrometer is taken. The au¬ thor found by repeated experiments, that the differ¬ ence between the greateft extenfion and contraftion of improperly prepared, and that has a weight of about three grains fufpended to it, is nearly ^ of its whole length; that is, 31, or lines in a foot. This circum- ftance fuggefted the idea of a new hygrometer : And, in order to render thofe fmall variations perceptible and ufeful, the following apparatus was conftrufted. Fig. 7. is a reprefentation of the whole inftrument, with the hair and other appendages complete. The lower extremity of the hair a b is held by the chaps of the fcrew pincers b. Thefe pincers are reprefented afide at B : by a fcrew at its end, it fattens into the nut ©f the bottom plate C. This nut of the plate turns independently of the piece that fupports it, and ferves to raife or deprefs the pincers B at pleafure. The upper extremity a of the hair is held by the under chaps of the double pincers a, reprefented afide at A. Thefe pincers fatten the hair below, and above fattens a very fine narrow flip of filver, carefully an¬ nealed, which rolls round the arbor or cylinder d, a fe- parate figure of which is ftown at DF. This arbor, wbich carries the needle or index ee, or E in the fepa- rate figure, is cut in the fliape of a fcrew; and the in¬ tervals of the threads of this fcrew have their bafes flat, and are cut fquarely fo as to receive the flip of filver that is fattened to the pincers a, and joined in this manner with the hair. M. Sauffure obferves, that hair alone fixed immediately to the arbor would not do; for it curled upon it, and acquired a ftiffnefs that the counter- poife w-as not able to furmount. The arbor was cut in a fcrew form, in order that the flip of filver in wind¬ ing upon it (hould not increafe the diameter of the. arbor, and never take a fituation too oblique and vari¬ able. The flip is fixed to the arbor by a fmall pin F.. The other extremity of the arbor D is (haped like a pulley, flat at the bottom fo as to receive a fine fupple filken firing, to wrhich is fufpended the counterpoife, g in the large figure, and G in the fide one. This counterpoife is applied to diftend the hair; and afts in a contrary direftion to that of the hair, and the move- able pincers to vvhich the hair is fixed. If then the hair Ihould be loaded with the weight of four grains, the counterpoife muft w'eigh four grains more than the pincers. The arbor at one end paffes through the cen¬ tre of the dial, and turns therein, in a very fine hole,, on a pivot made very cylindrical and well poliftied : at the other end is alfo a fimilar pivot, wdiich turns in an. hole. H Y G [ 35 ] H Y G Kygrome hole made in the end of the arm h of the cock h i, ter. H I. This cock is fixed behind the dial by means of v the fcrew I. The dial leek, divided into 360 degrees, isfupport- ed by two arms 11; thefe are foldered to two tubes, which inclofe the cylindrical columns mm mm. The fetting fcrews n n move upon thefe tubes, and ferve thereby to fix the dial and arbor to any height requi¬ red. The two columns which fupport the dial are firmly faftened to the cafe of the hygrometer, which reft, upon the four fcrews 0000; by the afiiftance of thefe fcrews, the inftrument is adjufted, and placed in a vertical fituation. The fquare column p p, which refts upon the bafe of the hygrometer, carries a box q, to which is fixed a x kind of port-crayon r, the aperture of which is equal to the diameter of the counterpoife g. When the hy¬ grometer is to be moved from one place to another ; to prevent a derangement of the inftrument from the ofcillations of the counterpoife, the box q, and the port-crayon r, muft be raifed up fo as the counterpoife may fall into and be fixed in it, by tightening the fcrew s and the box and counterpoife together by the fcrew t. When the hygrometer is intended for ufe, the counterpoife muft be difengaged by lowering the box, as may be conceived from the figure. Laftly, at the top of the inftrument is a curved piece of metal x,y, z, which is faftened to the three columns juft defcribed, and keeps them together. It has a fquare hole at y, which ferves to hang up the hygro¬ meter by when required. The variations of which this hygrometer is capable, are (all things befides equal) as much greater as the arbor round which the flip of filver winds is than a fmaller diameter, and as the inftrument is capable of receiving a longer hair. M. Sauflure has had hygro¬ meters made with hairs 14 inches long, but he finds one foot fufficient. The arbor is three-fourths of a line in diameter at the bafe between the threads of the fcrew or the part on which the flip winds. The variations, when a hair properly prepared is applied to it, are more than an entire circumference, the index defcribing about 400 degrees in moving from extreme drynefs to extreme humidity. M. Sauffure mentions an inconvenience attending this hygrometer, •viz. its not returning to the fame point when moved from one place to another; becaufe the weight of three grains that keeps the filver flip extended, cannot play fo ex¬ actly as to aft always with the fame precifion againft the arbor round which it winds. But this weight cannot be fenfibly increafed without ftill greater inconvenien¬ ces : he therefore obferves, that this hygrometer is well calculated for a fixed fituation in an obfervatory, and forvarioushygrometrical experiments; fince, inftead of the hair, there may be fubftituted any other fub- ftance of which a trial may' be wanted ; and it may be kept extended by a counterpoife more or lefs heavy as they may require : but the inftrument will not ad¬ mit of being moved, nor ferve even for experiments which may fubjeft it to agitation. Portable To obviate the objeftion above mentioned, M. Sauf- tiygrome- fure has contrived another apparatus more portable jfauflu ^ anc* conven*ent> and which, if not fo extenfive in its va- ^ ure' nations, is in faft very firm, and not in the leaft liable to be deranged by carriage and agitation. Fig. 8. is a reprefen tat ion of this hygrometer, which he calls the Hygromc- portable hygrometer, in diftinftion from the preceding, ( ttr~ which he calls the great hygrometer or the hygrometer "v with the arbor. The material part of this inftrument is its index alee; an horizontal view of which, and the arm that carries it, is feen in the feparate figure GBDEF. This index carries in its centre D a thin tube hollow throughout, and projefts out on each fide of the needle. The axis which paffes through it, and round which the index turns, is made thin in the middle of its length and thick at the ends; fo that the cylindrical tube which it pafles through touches it only at two points, and afts upon it only at its extre¬ mities. The part de DE of the index ferves to point out and mark on the dial the degrees of moifture and diy- nefs ; the oppofite part db DB ferves to fix both the hair and counterpoife. This part, which terminates in a portion of a circle, and is about a line in thicknefs, is cut on its edge in a double vertical groove, which makes this part fimilar to the fegment of a pulley with a double neck. Thefe two grooves, which are portions of a circle of two lines radius, and have the fame centre with that of the index d, ferve in one of them to contain the hair, and in the other the filk, to the end of which the counterpoife is fufpended. The fame index carries vertically above and below its centre two fmall fcrew-pincers, fituated oppofite to the two grooves:, that above at a, oppofite to the hindmoft groove, ferves to fix the filk to which the counterpoife is fufpended ; and that below at b, oppofite to the hithermoft groove, ferves to hold one of the ends of the hair. Each of thefe grooves has its partitions cut, as feen in the feftion B, and its bottom made flat, in order that the hair and filk may have the greateft: freedom pofiible. The axis of the needle DD goes thro’ the arm gf GF, and it is fixed to this arm by the tightening fcrew /F. All the parts of the index ftiould be in perfeft equilibrium about its centre; fo that when it is on its pivot without the counterpoife, it will reft: indifferently in any pofition it may be placed in. It muft be underftood, that when the hair is fixed by one of its extremities in the pincers e, and by the other end on the pincers y at top of the inftrument, it paffes in one of the necks of the double pulley b, whilft the counterpoife to which the filk is fixed in a paffes in the other neck of the fame pulley: the coun¬ terpoife ferves to keep the hair extended, and afts al¬ ways in the fame direftion and with the fame force, whatever the fituation of the index may be. When therefore the drynefs contrafts the hair, it overpowers the gravity of the epunterpoife, and the index defeends: when, on the contrary, the humidity relaxes the hair, / it gives way to the counterpoife, and the index afcencE.*■ The counterpoife fhould weigh but three grains; f& that the index ftiould be made very light and very eafy in its motion, in order that the leaft pofiible force may move it and bring it back again to its point when drawn afide. The dial heh is a circular arch, the centre of which is the fame wdth that of the index. This arch is di¬ vided into degrees of the fame circle, or into the hun¬ dredths of the interval which is found between the li¬ mits of extreme drynefs and extreme humidity. The interior edge of the' dial carries at the diftance h i a E 2 kind H T G r Hyprome kind of proje&ing bridle or ftay it, made of brafs wire, ^ curved to the arch, and fixed in the points/j. This ^ ' _¥ bridle retains and guards the index, at the fame time leaving it to play with the requifite freedom; The ferew pincers in which is faltened the upper extre¬ mity of the hair, is carried by a moveable arm, which afeends and defeends at pleafure the length of the frame K&. This frame is cylindrical every where elfe, ex¬ cept its being here flattened at the hinder part to about half its thicknefs, in order that the piece with the ferew which carries the arm fhould not project out underneath, and that the arm may not turn. The arm may be Hopped at any defired height' by means of the palling ferew .v. But as it is of ufe fometimes to be able to give the inflrument a very fmalk and ac¬ curate motion, fo as to bring the index exactly to the part that may be wanted, the Hide piece /, which car¬ ries the pincers y, to which the hair is fixed, is to be moved by:the adjufting ferew in. At the bafe of the inftrument is a great lever nopqj which ferves to fix the index and its counterpoife when the hygrometer is to be moved. The lever turns an axis n, terminated by a ferew which goes into the frame; in tightening this ferew, the lever is fixed in the defired pefition. When the motion of the index is to be Hopped, the intended pofition is given to this lever, as reprefented in the dotted lines of the figure. The long neck p of the lever lays hold of the double pulley b of the index, and the Ihort neefe o of the coun¬ terpoife:.the tightening ferew q faHens the two necks at once. In confining the index, it muH be fo placed, that the hair be very flack; fo that, if whilfi it is moved the hair fhould get dry, it may have room to contrail itfelf. Afterwards, when the inflrument is placed for ufe, the firfl thing to be dene is to relax the ferew n, and turn back the double lever with great care, taking equal caution at'the fame time not to flrain the hair. It is better to apply one hand to the index near its centre, whilfl the other hand is difenga- ging the pulley -and the counterpoife from the lever that holds them Heady. The hook r ferves to fufpend a thermometer upon ; it fliould be a mercurial one, with a very fmall naked bulb or ball, foas to fhow in the mofl fenfible manner the changes of the air: it fhould be mounted in metal, and guarded in fuch a manner as not to vibrate fo as to break the hair. Laflly, a notch is made under the top of the frame s, to mark the point of fufpenfion, about which the inflrument is in equilibrium, and keeps a vertical fituation. All the inftrument fliould be made of braft : though the axis of the index and its tube work more pleafantly together if made of bell metal. The extent of this hygrometer’s variations is not more than the fourth or fifth part of the hygrometer ■with the arbor. It may be augmented by making the fegment of the pulley to which the hair is fixed of a frnaller diameter ; but then the hair, in moving about it, would fret and contraft a ftiffntfs, which would caufe it to adhere to the bottom of the neck. M. Sauflure is of opinion, that the radius of this pulley Ihould not lie lefs than two lines, at leaft that there fliould be adapted a plate of frlver or fome other contrivance; but then the hygrometer would be too difficult to con- ftruft, and it would require too much attention and care on the part of thole who ufe it; his objeft was, S6 ] H Y G to make an inftrument generally ufeful, and eafy Hj and convenient in its ufe. The hygrometer with the arbor may be ufed for obfervations which require an extreme fenfibility. The variations of this iaftrument may be augment¬ ed by making it higher, becaufe in that cafe longer hairs might be adapted : but it would be then lefs portable. Befidcs, if the hair is too long when obfervations are made in the open air, the wind has too great an effect; upon it, and thus communicates to the index in¬ convenient vibrations. It ist. not proper therefore to make it more than a foot'in height.* When it is of this dimenfion, an hair properly prepared can be ap¬ plied to it, and its variations from extreme drynefs to- extreme humidity are 80 or even ipo degrees; which . on a circle of 3 inches radius forms an extent fufficient for obfervatrons of this kind. M. Sauflure has even made fmaller inftruments that may be carried conve¬ niently in the pocket, and to make experiments with under fmall receivers: they were hut feven inches high*, by two inches of breadth; which,motwithftanding their ^ variations, were very fenfible. Thus much for the conftru&ion of the various parts of the inftrumenti.. The limits of this work will not: admit of our inferting the whole of M. Sauflure’s fub- - fequent account of the preparation of the hair, the manner of determining the limits of extreme humidity and of *extreme drynefs, the pyrometrical variations of the hair, and the graduation of the hygrometer. The following abftraft muft therefore fuffice. In the: preparation of the hair, it was found ne- cefi'ary to free: it* of a certain' unftuofity it always . has in its natural Hate, which in a great meafure de¬ prives it of its hygrometrical fenfibility Anumber - of hairs are boiled in a lye. of vegetable.alkali; and ■ among thefe are to be- chofen for ufe fuch as are - moft tranfparent, bright, and foft: particular pre¬ cautions are neceffary for preventing the ftraining of >: the hair, which renders it unfit for the intended ptir- pofe. The two fixed points of the hygrometer are the ex-: tremes both of moifture and drynefs. The former is > obtained by expofing the inftrument to air completely faturated with water; and this is effe&ed by placing it in a glafs receiver Handing in water, the fides of which are kept continually moiltened. The point on • the dial, at which the hand after a certain interval re¬ mains ftationary, is marked 100. The point of ex¬ treme drynefs, not abfolute drynefs, for that does not exift, but the greateft degree of it that can be obtain¬ ed, is produced by introducing repeatedly into the fame receiver containing the inftrument, and ftanding now upon quickfilver, certain quantities of deliquefeent al¬ kaline falts, which abforb the moifture of the air. - The higheft point to which the hand can be brought by this operation, not only when it will rife no higher, but when it becomes retrograde from the dilatation occafioned by heat, is called o ; and the arch between thefe two points isdivrded into 100 equal parts, being degrees of the hygrometer. The arch pp, upon which: the fcale is marked in the inftrument (reprefented in fig. 2.) being part of a circle of three inches diameter; hence every degree meafures about of a line. In the ftationary hygrometer, fig. r. the fcale upon the complete circular dial is fo much larger, that every degree H Y G l 37 3 H Y G Mfimme. degree raeafures about five lines : but this M. Sauflure fe,j confiders as far from being a perfection, that it is ra- BT '' ther an inconvenience ; fince the inftrument becomes thereby fo very fufceptible of the leafl impreffion, that there is even no approaching it without a fenfible variation. The thermometer, adapted as before men¬ tioned, fervee to correCt the changes of tempera¬ ture : towards the extreme drynefs, i° of the thermo¬ meter produces on the hair an effeCt of 4 deg. of the hygrometer ; but towards the extreme of moifture, the fame difference of temperature caufes an effedt no lefs than 30 on the hygrometer. He conftru&ed two tables, chat'gave the intermediate hygrometrical varia¬ tions for fingle degrees of the thermometer at different parts of the fcale. The whole range of the atmofpherical variations takes in about 75? of this fcale; a drynefs of more than 250 being always the effeft of art The fenfibi- Iky of this inftrument is fo very great, that being ex- pofed to the dew, he mentions that it varies above 40° in about 20 minutes of time. Being removed from a very moift into a very dry air, it varied in-one inftance no lefs than 350 in three minutes. He fays that its variations were always found uniform in diffe¬ rent inftruments fufpended in different parts of the fame atmofphere. This hygrometer is confldered by the author as'pofTeffed of all the properties requifite in fuch an inftrument. Th’efe are, 1. That the degrees in the fcale be fufhciently large, and to point out even the leaft variation in the drynefs or moifture of the at- xnofphere. 2. That it be quick in its indications. 3. That it be at all times confiftent with itfelf; w«. that in the fame iUte of the hair it always points to the fame degree. 4- That feveral of them agree with one another. 5, That it be affefted only by the aque¬ ous vapours. 6 That its variations be ever propor¬ tionate to the changes in the air. Not many of thefe hygrometers have yet been made in London. A confiderable degree of trouble and becaufe whatever alte- chufe to be at the trouble of cpnftrufting a hygrome- ration may take place by this expofure, the paper al¬ ter on the principles of Mr Smeaton or De Luc, this ready weighed muft have undergone the fame ; being will probably be found the moft eafy and accurate, confequently in the fame ftate, they muft be cut ta Fig. 1 1. reprefents an hygrometer of this kind. A is the fame weight. a fmall glafs cup containing a fmall quantity of oil of For eafier weighing the paper, take a piece of round vitriol, B an index counteipoifing it, and C the fcale; tin or brafs the fize of a crown-piece, through the where it is plain, that as the oil of vitriol attrafts the centre of which drill a hole, and alfo three others round moifture of the air, the fcale will defeend, which will it at equal diftances : then cut about one hundred raife the index, and vlceverfa. This liquid is exceed- papers; and after putting them under the tin 01 brafs, ingly fenfible of the ineveafe or decreafe of moifture, drive through each hole a ftrong pin into a board, in A Angle grain, after its full increafe, has varied its order to round them to the fhape of the plate: the equilibrium fo fenfibly, that the tongue of a balance, papers muft be then feparated and expofed to the air only an inch and a half long, has deferibed an arch a few hours with that already weighed, and fo manv one third of an inch in compafs (which arch would of them taken as are equal to the weight already fpe- have been almoft three inches if the tongue had been cified. This done, threadle them together through one foot), even with fo fmall a quantity of liquor; con- thofe holes made by the pins, putting between everv fequently, if more liquor, expanded under a large fur- paper on each thread a fmall bead, in order to prevent face, were ufed, a pair of feales might afford as nice the papers from touching each other, and alfo that an hygrometer as any kind yet invented—A great in. the air may be more readily admitted. The top of convenience, however, is, that as the air muft have the hygrometer is cohered with a card cut to the fame full accefs to the liquid, it is impoffible to keep out fize ; and which, by reafon of its ftiffnefs, fupports all the dull, which, by continually adding its weight, the papers, and keeps them in proper lhape. Before muft render the hygrometer falfe ; add to this, that the papers are threaded, the beads, filk, card, and a even oil of vitriol itfelf is by time deftroyed, and thin piece of brafs about the fize of a fixpence, which changes its nature, if a fmall quantity of it is conti- muft be placed at the bottom, and through which the nually expofed to the air. centre ftring paffes, muft be weighed with the greateft The beft hygrometer upon this principle, and for exadlnefs, in order to bring them to a certain weight, afeertaining the quantity as well as the degree of fuppofe 50 grains; now the paper in its dried date, moifture in the variation of the hygrometer, is of the being of equal weight, they will weigh together 100 contrivance of Mr Coventry, Southwark, London, grains, confequently what they weigh more at any The account he has favoured us with is as follsws. time is moifture. “ Take two fheets of fine tiffue paper, fuch as is ufed by To obviate the trouble and difficulty of trying ex- hatters ; dry them carefully at about two feet diftance periments with weights and feales, Mr Coventry con- from a tolerably good fire, till after repeatedly weigh- trived a machine or fcale by which to determine at ing them in a good pair of feales no moifture remains, one view the humidity or drynefs of the atmofphere. When the Iheets are in this perfeftly dry ftate, reduce This, with its cafe, is reprefented by fig. 12. The them to exadtly 50 grains; the hygrometer is then fit front and back of the cafe are glafs; the fides fine £qi ufe. The Iheets muft be kept free from dull, and gauze, which excludes the dull and admits the air • the; H Y G [ 4« ] H Y M Hygrome- tlie cafe Is about 10 Inches high, 8 Inches broad, and , tgr‘ 4 inches deep. A, a brafs bracket in front, behind v ' which, at about 34-inches diftance, is another ; thefe fupport the axis of the index E, alfo of the beam D, and another which fupports the ftem B, to which .the ivory fcale of divilions C is fixed. G, a brafs fcale fufpended in the ufual manner to the end of a beam D, and weighing exaftly 100 grains. This fcale is an exaft counterpoife to the papers / and the different apparatus. The particular manner of fufpenfion in this balance is, from the conftrufiion, as follows: The axis of the beam^, which is made of brafs, inftead of hanging on .pivots as in common fcales, turns with two. fteel edges k k, fixed in the extremities of the brafs axis : thefe edges are fhaped like the edge of a knife, and aft on two fteel concave edges U, in order to ren¬ der the friftion as fmall as poflible. D is a fine fcale beam fixed at right angles with the axis ^ E, the fteel index fixed to the under fide of the fame axis. E, a brafs Aiding weight : h is the axis that holds the ftem B to which the fcale of divifionsC is fixed. AA, the brafs brackets which fupport the whole by four ferews, two of which are feen at i i, that ferevv the Brackets to the top of the cafe. The axis of the fcale of divifions is hung on pivots, one of which is Teen at m, that, ftiould the cafe not Hand level, the ftem B may always be in a perpendicular fituation. The hygrometer, before ufe, (hould be adjufted as Tollows: To the end of the beam where the hygro¬ meter is fufpended, hang a weight of 100 grains, which is equal to the weight of the fcale; then move the Aiding weight F up or down the index E, till one grain will caufe the index to traverfe neither more nor lefs than the whole fcale of divifions; then add half a grain to the fcale, in order to bring the index to o; and the inftrument, after taking off the 100 grain weight and hanging on the papers, is fit for ufe; then put grain weights in the fcale till the index is brought within compafs of the fcale of divifions. Example : H is 3 grains on the brafs fcale, and the index points .at 10; confequently there is 3 grains and 10 hun¬ dredths of a grain of moifture in the papers. If four grain-weights are kept, was. 1, 2, 4, and 5, they will make any number from 1 to 9, which are as many as will be wanted. Sometimes the index will continue traverfing within the fcale of divifions for many days ■without (hifeing the weights; but if otherwife, they jnuft be changed as occafion may require. “ One great advantage of this hygrometer above all -others that have attrafted my notice is (fays Mr Co¬ ventry), that it a&s from a ccxX.zm datum, namely, the Bry-extreme; from which all the variations towards moift are calculated with ceitainty: and if conftrufled with that precifion reprefented by the drawing, it will afford pleafure to the curious in obferving the almoft perpetual alteration of the atmofphere, even in the tnoft fettled weather. In winter it will be conftantly traverfing from about eight in the morning till four or five in the afternoon, towards dry j and in fummer, from about four in the morning till fix or feven in the evening, when the weather is hot and gloomy, the hygrometer difeovers a very great change towards moifture ; and when clear and frofty, that it contains a much greater quantity of moifture than is generally imagined.” ibit HYGROSCOPE. The fame with Hygrome¬ ter. HYLA (anc. geog.), a river of Myfia Minor, fa¬ mous for Hylas the favourite boy of Hercules, who was carried down the ftream and drowned. It is faid to run by Prufa; whence it feems to be the fame with the Rhyndacus, which runs north-weft into the Pro¬ pontis. HYLAS, in fabulous hiftory, fon of Theodamus, was raviftied by the nymphs of a fountain as he was taking out fome water for Hercules, by whom he was i beloved. HYLOZOISTS, formed of matter, life, the name of a feft of atheifts among the ancient Greek philofophers, who held matter to be animated ; main¬ taining that matter had fome natural perception, with- out animal fenfation, or refleftion in itfelf confidered ; i but that this imperfedt life occafioned that organiza- : tion whence fenfation and refleftion afterwards arofe. Of thefe, fome held only one life, which they called a plastic nature, prefiding regularly and invariably over J the whole corporeal univerle, which they reprefented as a kind of large plant or vegetables thefe were called the cofmoplaftic and ftoical atheifts, becaufe the Stoics held fuch a nature, though many of them fuppofed it i to be the inftrument of the Deity. Others thought that every particle of matter was endued with life, and \ made the mundane fyttem to depend upon a certain mixture of chance and plaftic or orderly nature united together. Thefe were called the Stratonici, from Strato Lampfacenus, adifciple of Theophraftus, called alfo Phyficus, (Cicero, De Nat. Deor. lib. i. cap. 13.) who was firft a celebrated Peripatetic, and afterwards formed this new fyftem of atheifm for himfelf. Befides thefe two forms of atheifm, fome of the ancient philo¬ fophers were Hylopathians, or Anaximandrians, de¬ riving all things from dead and ftupid matter, in the way of qualities and forjns, generable and corruptible ; and others again adopted the atomical or Democri- tical fyftem, who aferibe the produ£tion of the univerfe to atoms and figures. See on this fubjeft Cudavorth’s Jntelk dual Syjlem, book i. chap. 3. HYMEN, or Hvmena;us, a fabulous divinity, the fon of Bacchus and Venus Uraaia, was fuppofed by the ancients to prefide over marriages; and ac¬ cordingly was invoked in epithalamiums, and other matrimonial ceremonies, under the formula, Hymen, or Hymeneee! The poets generally crown this deity with a chap¬ let of rofes ; and reprefent him, as it were, diffolved and enervated with pleafures ; dreffed in a yellow robe, and ftioes of the fame colour; with a torch in his hand.—Catullus, in one of his epigrams, addreffes hina thus : J Cinge tempora fortius, Suelveokntis amaraci. It was for this reafon, that the new-married couple bore garlands of flowers on the wedding-day: which cuftom alfo obtained among the Hebrews, and even among Chriftians, during the iirft: ages of the church, as ap¬ pears from Tertullian, De corona militari, where he fays, Coronant £5* nuptse fponfos.—S. Chryfoftom hkewife mentions thefe crowns of flowers ; and to this day the Greeks call marriage in refpeft of this crown or garland. z Hymek, Hygrometer H Y M [ 41 1 H Y M Hyrorn- Hymen, ’TjUuv, in anatomy, A thin Membrane or fldn, % fometimes circular, of different breadths, more or lefs fmooth, and fometimes femilunar, formed by the union of the internal membrane of the great canal with that on the infide of the alae, refembling a piece of fine parchment. This membrane is fuppofed to be ftretch- ed in the neck of the womb of virgins, below the nymphae, leaving in fonie fubje&s a very fmall opening, in others a larger, and in all rendering the external ori¬ fice narrower than the reft of the cavity, and to be broke when they are deflowered; an effufion of blood following the breach. This membranous circle may likewife fuffer fome diforder by too great a flux of the menfes, by impru¬ dence, levity, and Other particular accidents. The hymen is generally looked upon as the teft of vir¬ ginity ; and when broke, or withdrawn, fhows that the perfon is not in a ftate of innocence. This notion is very ancient. Among the Hebrews, it was the cuftom for the parents to fave the blood fhed on this occafion as a token of the virginity of their daughter, and to fend the (beets next day to the hufband’s relations. And the like is faid to be ftill pra&ifed in Portugal, ■and fome other countries. And yet authors are not agreed as to the exiftence of fuch a membrane. Nothing, Dr Drake obferves, has employed the curiofity of anatomifts, in diflefling the organs of generation in women, more than this part: they have differed not only as to its figure, fub- ftance, place, and perforation, but even its reality ; fome pofitively affirming, and others flatly denying it. De Graaf himfelf, the moft accurate inquirer into the ftru£ture of thefe organs, confeffes he always fought it in vain, though in the moft unfufpe&ed fubjecls and ages : all he could find was, a different degree of ftrait- nefsor widenefs, and different corrugations, which were greater or lefs according to the refpe£tive ages; the aperture being ftill the lefs, and the rugofities the greater, as the fubjedl was younger and more un¬ touched. Dt Drake, on the other hand, declares, that in all the fubjefts he had opportunity to examine, he does not re¬ member to have miffed the hymen fo much as once, where he had reafon to depend on finding it. The faireft view he ever had of it was in a maid who died at thirty years of age; in this he found it a membrane of fome ftrength, furnifhed with flefliy fibres, in figure round, and perforated in the middle with a fmall hole; capable of admitting the end of a woman's little finger, and ficuated a little above the orifice of the urinary paf- fage, at the entrance of the vagina of the womb. In infants,itis a finethin membrane, not very confpi- cuous, becaufe of the natural ftraitnefs of the paffage it- felf, which does not admit of any great expanfion in fo little room ; which might lead De Graaf into a notion of its being no more than a corrugation. This membrane, like moft others, does probably grow more diftind, as well as firm, by age. That it not only exifts, but is fometimes very ftrong and im¬ pervious, may be colle&ed from the hiftory of a cafe reported by Mi Cowper. In a married woman, twenty years of age, whofe hymen was found altogether imper¬ vious, fo as to detain the menfes, and to be driven out by the prefiure thereof beyond the labia of the puden¬ dum, not unlike a prolaptus of the uterus; on divi- Vol. IX. Part. I. ding it, at leaft a gallon of grumous blood came forth. Hymense* It feems the hufband, being denied a paffage that way, „ H had found another through the meatus urinarius; which , yrnn' . was found very open, and its fides extruded like the anus of a cock. Upon a rupture of the hymen, after the confumma- tion of marriage, and efpecially delivery, its parts, fhrinking up, are fuppofed to form thofe little flefhy knots, called carvucvlje myrtiformes. HYMENALA, the bastard locust tree : A genus of the monogynia order, belonging to the decan- dria clafs of plants; and in the natural method ranking under the 33d order, Lomentace*. The calyx is quin- quepartite ; there are five petals, nearly equal; the ftyle is intorted ; the legumen full of meally pulp. There is but one fpecies, the courbaril, which is a large tree, growing naturally in the Spanifh Weft Indies. The trunk is covered with a light afh-coloured bark, is often more than 60 feet high and three in diameter. The branches are furnifhed with dark green leaves, which (land by pairs on one common footftalk, diver¬ ging from their bafe in manner of a pair of fhears when opened. The flowers come out in loofe fpikes at the ends of the branches, and are yellow, ftriped with purple. Each confifts of five petals, placed in a double calyx, the outer leaf of which is divided into five parts, and the inner one is cut into five teeth at its brim. In the centre are ten declining ftamina, longer than the petals, furrounding an oblong ger- men, which becomes a thick, flefliy, brown pod, four or five inches long and one broad, with a future on both edges, and includes three or four purplifh feeds, fomewbat of the fhape of Windfor beans, but fmaller. The feeds are covered with a light brown fugary fub- ftance, which the Indians ferape off and eat with great avidity, and which is very pleafant and agreeable.— At the principal roots under ground, is found collec¬ ted in large lumps a yellow ilh-red transparent gum, which diffolved in rectified fpirit of wine affords a moft excellent varnifh, and is the gum anime of the (hops. HYMENiEAL, fomething belonging to marriage; fo called from Hymen. . HYMENOPTERA (derived from membrane, and vripov living), in the Linnaean fyftem of natural hiftory, is an order of infedls, having four membrana¬ ceous wings, and the tails of the females are furnifhed with flings, w'hich in fome are ufed for inftilling poi- fon, and in others for merely piercing the bark and leaves of trees, and the bodies of other animals, in which they depofit their eggs. HYMETTUS (anc. geog.), a mountain of At¬ tica near Athens, famous for its marble quarries, and for its excellent honey. Hymettius the epithet. Pliny fays that the orator Craffus w’as the firft who had marble columns from this place, t; HYMN, a fong or ode in honour of God ; or a poem, proper to be fung, compofed in honour of fome deity.—The word is Greek, hymn, formed of the verb celelro, “ I celebrate.”—Ifio- dore, on this word, remarks, that hymn is proper¬ ly a fong of joy, full of the praifes of God : by which, according to him, it is diftinguifhed from threna, which is a mourning fong, full of lamenta¬ tion. St Hilary, bifltop of Poictiers, is faid to have been F the HYO [42 7 HYP Hyobanche the firft that compofed hymns to be fung In churches, II and was followed by St Ambrofe. Moft: of thofe roideiJ" t^ie Ronian Breviary were compofed by Pruden- u. y—tius. They have been tranflated Into French verfe by Meflieurs de Port Royal.—In the Greek Liturgy there are four kinds of hymns ; but the word Is not taken in the fenfe of a pralfe offered In verfe, but fimply of a laud or praife. The angelic hymn, or Gloria in exceljis, makes the firft kind; the trifagion the fecond ; the Cherubic hymn, the third ; and the hymn of victory and triumph called the laft. The hymns or odes of the ancients generally con¬ fided of three forts of ftanzas ; one of which, called Jlrophe, was fung by the band as they walked from eaft to weft ; another, called anti/lrophe, was performed as they returned from weft to eaft ; the third part, or epoch, was fung before the altar. The Jewifti hymns were accompanied with trumpets, drums, and cymbals, to afiift the voices of the Levites and people. HYGBANCHE, in botany: A genus of the angio- fpermia order, belongingtothedidynamiaclafs of plants. The calyx is heptaphyllous; the corolla ringent, with no under lip. The capfule bilocular, and polyfpermous. HYOIDES, in anatomy, a bone placed at the root of the tongue. See Anatomy, n° 28. HYOSCYAMUS, henbane : A genus of the monogynia order, belonging to the pentandria clafs of plants ; and in the natural method ranking under the 28th order, Lurida. The corolla is funnel-lhaped and obtufe ; the ftamina inclining to one fide ; the capfule covered and bilocular. There are feveral fpecies, one of which, ■w'z. the niger, or common henbane, is a na¬ tive of Britain. It grows on road-fides, and among rubbifh. It is a biennial plant, with long flefhy roots which ftrike deep into the ground, fending out feve¬ ral large foft leaves, deeply llalhed on their edges; the following fpring the ftalks come up, which are about two feet high, garnifhed with flowers Handing on one fide in a double row, fitting clofe to the ftalks alter¬ nately. They are of a dark purplifti colour, with a black bottom; and are fucceeded by roundilh cap- fules which open with a lid at the top, and have two cells filled with fmall irregular feeds.—The feeds, leaves, and roots of this plant, as well as of all other fpecies of this genus, are poifonous: and many well attefted inftances of their bad effefts are recorded; madnefs, convulfions, and death, being the common confequence. In a fmaller dofe, they occafion giddi- nefs and ftupor. It is faid that the leaves fcattered a- bout a houfe will drive away mice.-^-The juice of the plant evaporated to an extraft is prefcribed in fome cafes as a narcotic; in which refpett undoubtedly it may be a powerful medicine if properly managed. The dofe is from half a fcruple to half a dram. The roots are ufed for anodyne necklaces.—Goats are not fond of the plant; horfes, cows, ftieep, and fwine, refufe it. HYOSERIS, in botany ; A genus of the polyga- mia sequalis order, belonging to the fyngenefia clafs of plants ; and in the natural method ranking under the 49th order, Compoftta. The receptacle is naked, the calyx nearly equal; the pappus hairy, or fcarce perceptible. •HYQ’THYRQIDES, in anatomy, one of the mufcles belonging to the os hyoides. See Anatomy, Hypallagi Table of the Mufcles. 11 . \ HYPALLAGE, among grammarians, a fpecies , H!pafia~ of hyperbaton, confifting in a mutual permutation of ' - one cafe for another. Thus Virgil fays, Dare claflibus aujlros, for dare clajfes aujlris; and again, Necdum illis labra admovi, for necdum ilia labris admovi. HYPANTE, or Hyperpante, a name given by the Greeks to the feaft of the prefentation of Jefus in the temple.—This word, which fignifies lowly or humble meeting, was given to this feaft from the meet¬ ing of old Simeon and Anna the prophetefs in the temple when Jefus was brought thither. HYPATIA, a learned and beautiful lady of anti¬ quity, the daughter of Theon a celebrated philofopher and mathematician, and prefident of the famous Alex¬ andrian fchool, was born at Alexandria about the end of the fourth century. Her father, encouraged by her ex¬ traordinary genius, had her not only educated in all the ordinary qualifications of her fex, but inftrufted in the moft abftrufe fciences. She made fuch great progrefs in philofophy, geometry, aftronomy, and the mathema¬ tics, that fire paffed for the moft learned perfon of her time. At length fire was thought worthy to fucceed her father in that diftinguifhed and important employment, the government of the fchool of Alexandria ; and to teach out of that chair where Ammonius, Hierocles, and many other great men, had taught before ; and this at a time too when men of great learning abounded both at Alexandria and in many other parts of the Roman empire. Her fame was fo extenfive, and her worth fo univerfally acknowledged, that we cannot wonder if fhe had a crowded auditory. “ She ex¬ plained to her hearers (fays Socrates) the feveral fciences that go under the general name of philofophy; for which reafon there was a confluence to her, from all parts, of thofe who made philofophy their delight and ftudy.” One cannot reprefent to himfelf without pleafure, the flower of all the youth of Europe, Afia, and Africa, fitting at the feet of a very beautiful lady (for fuch we are affured Hypatia was), all greedily (wallowing inftrudlion from her mouth, and many of them, doubtlefa, love from her eyes; though we are not fure that fire ever liftened to any felicitations., fince Suidas, who talks of her marriage with Ifiodorus, yet relates at the fame time that fhe died a maid. Her fcholars were as eminent as they were nume¬ rous ; one of whom was the celebrated Synefius, who, was afterwards biftrop of Ptolemais. This ancient Chriftian Platonift every where bears the ftrongeft, as well as the moft grateful, teftimony of the virtue of his iutorefs ; and never mentions her without the moft profound refpeft, and fometimes in terms of affe&ion coming little fhort of adoration. But it was not Sy¬ nefius only, and the difciples of the Alexandrian fchool, who admired Hypatia for her virtue and learning; never was woman more careffed by the public, and yet never woman had a more unfpotted charafter. She was held as an oracle for her wifdom, which made her confulted by the magiftrates in all important cafes; and this frequently drew her among the greateft con,- courfe of men, without the leaft cenfure of her manners. In a word, when Nicephorus intended to pafs the higheft compliment on the princefs Eudocia, he 4 thought HYP [ 43 1 HYP thought he could not do it better than by calling her || another Hypatia. Hyper- While Hypatia thus reigned the brighteft orna* , t>aton- ment of Alexandria, Oreftes was governor of the ^ v ' fame place for the emperor Theodofius, and Cyril was bifhop or patriarch. Oreftes having had a liberal edu¬ cation, could not but admire Hypatia ; and as a wife governor frequently confulted her. This, together with an averfion which Cyril had againft Oreftes, proved fatal to the lady. About $oo monks affem- bling, attacked the governor one day, and would have killed him, had he not been refcued by the townfmen; end the refpeft which Oreftes had for Hypatia cau¬ sing her to be traduced among the Chriftian multitude, they dragged her from her chair, tore her to pieces, and burned her limbs. Cyril is not clear from a fuf- picion of fomenting this tragedy. Cave indeed en¬ deavours to remove the imputation of fuch an horrid a&ion from the patriarch ; and lays it upon the Alex¬ andrian mob in general, whom he calls kvijfimum ho- tninum genus, “ a very trifling inconftant people.” But though Cyril fhould be allowed neither to have been the perpetrator, nor even the contriver of it, yet it is much to be fufpefted that he did not difcoun- tenance it in the manner he ought to have done : which fufpicion muft needs be greatly confirmed by reflefting, that he was fo far from blaming the out¬ rage committed by the monks upon Oreftes, that he afterwards received the dead body of Ammonius, one of the moft forward in that outrage, who had grie- voufly wounded the governor, and who was juftly pu- nilhed with death. Upon this riotous ruffian Cyril made a panegyric in the church where he was laid, in which he extolled his courage and conftancy, as one that had contended for the truth ; and changing his name to ’Thaumaftus, or the “Admirable,” or¬ dered him to be confidered as a martyr. “ However, (continues Socrates), the wifeft part of Chriftians did not approve the zeal which Cyril (howed on this man’s behalf, being convinced that Ammonius had juftly fuffered for his defperate attempt.” HYPECOUM, wild cumin : A genus of the di- gynia order, belonging to the tetrandria clafs of plants; and in the natural method ranking under the 24th or¬ der, Corydales. The calyx is diphyllous; the petals four; the exterior two larger and trifid; the fruit a pod. There are four fpecies, all of them low herbace¬ ous plants with yellow flowers. The juice of thefe plants is of a yellow colour, refembling that of celan¬ dine, and is affirmed by fome eminent phyficians to be as narcotic as opium. From the neftarium of the bloflom the bees colleft great quantities of honey. All the fpecies are eafily propagated by feeds. HYPER, a Greek prepofition frequently ufed in compofition, where it denotes excels; its literal fignifi- cation being above, or beyond. HYPERBATON, in grammar, a figurative con- ftru&ion inverting the natural and proper order of words and fentences. The feveral fpecies of the hy¬ perbaton are, the anaftrophe, the hyfteron-proteron, the hypallage, fynchyfis, tmefis, parenthefis, and the hyperbaton ftriAly fo called. See Anastrophe, &c. Hyperbaton, ftri&ly fo called, is a long retention of the verb which completes the fentence, as in the fol- Hyperbolx, lowing example from Virgil: Hyperbole. Interea Reges : ingenii mole Latinus Quadrijugo vehitur curru, cui tempora circum Aurati bis fex radii fulgentia cingunt, Solis avifpecimen : bigis it Turnus in albis, Bina manu lato crifpans haftilia ferro : Bine Pater JEneas, Romance Jlirpis origo, Sidereo Jlagrans clypeo et celejlibus armis ; Etjuxta Afcanius, magnee fpes altera Rometi Procedunt cajlris. HYPERBOLA, a curve formed by cutting a cone in a direction parallel to its axis. See Conic- Sedions. HYPERBOLE, in rhetoric, a figure, whereby the truth and reality of things are exceffively either enlar¬ ged or diminiftred. See Oratory, n° 58. An objeft uncommon with refpeft to fize, Elements ep very great of its kind or very little, ftrikes us with Criticifm- furprife ; and this emotion forces upon the mind a mo¬ mentary convidtion that the objeft is greater or lefs than it is in reality: the fame effedl, precifely, attends figurative grandeur or littlenefs; and hence the hy¬ perbole, which exprefles this momentary convidion. A writer, taking advantage of this natural delufion, enriches his defeription greatly by the hyperbole : and the reader, even in his cooleft moments, relifhes this figure, being fenfible that it is the operation of nature upon a warm fancy. It capnot have efcaped obfervation that a writer is generally more fuccefsful in magnifying by a hyper¬ bole than in diminiihing. The reafon is, that a mi¬ nute objeft contrads the mind, and fetters its powers of imagination ; but that the mind, dilated and in¬ flamed with a grand objed, moulds objeds for its gra¬ tification with great facility. Longinus, with refped to a diniiniftiing hyperbole, cites the following ludi¬ crous thought from a comic poet: “ He was owner of a bit of ground not larger than a Lacedemonian letter.” But, for the reafon now given, the hyperbole has by far the greater force in magnifying objeds; of which take the following examples: For all the land which thou feeft, to thee will I give it, and to thy feed for ever. And I will make thy feed as the duft of the earth : fo that if a man can number the duft of the earth, then {hall thy feed alfo be numbered. Gen. xiii, 15. j6. Ilia vel intadae fegetis per fumma volaret Gramina: nec teneras curfu laefifiet ariftas. JEneid. vii. 808. —— Atque imo barathri ter gurgite vaftos Sorbet in abruptum fludus, rurfufque fub auras Erigit alternos, et fidera verberat unda. JEneid. iii. 42X. — Horrificis juxta tonat iEtna ruinis, Interdumque atram prorumpit ad sethera nubem, Turbine fumantem piceo et candente favilla : Attollitque globos flammarum, et fidera lambit. JEneid. iii. 571. Speaking of Polyphemus, Ipfe arduus, altaque pulfat Sidera. JEneid. iii. 619. F 2 —When ri y p Hyperbole.1 — —When he fpeaks, V-—v~—-J >phe air, a charter’d libertine, is ftill. Henry V. aB I. Jc. I. Now fhield with fhield, with helmet helmet clos’d, To armour armour, laute to lance oppos’d. Holt again ft hoft with lhadowy fquadrons drew, The founding darts in iron tempells flew. Vigors and vanquilh’d join'promifcuous cries. And flrrilling fliouts and dying groans arife ; With dreaming blood the flipp’ry fields are dy’d, And flaughter’d heroes fwell the dreadful tide. Iliad iv. 508. Quintilian is fenfible that this figure is natural: * For (fays he), not contented with truth, we natu¬ rally incline to augment or diminifh beyond it; and for that reafon the hyperbole is familiar even among the vulgar and illiterate and he adds, very juftly, “ That the hyperbole is then proper, when the objeft of itfelf exceeds the common meafure.” From thefe premifes, one would not expeft the following infe¬ rence, the only reafon he can find for juftifying this figure of fpeech, “ Conceditur enim amplius dicere, quia did quantum eft, non poteft : meliufque ultra quam citra flat oratio.” (We are indulged to fay more than enough, becaufe we cannot fay enough j and it is better to be above than under.) In the name of wonder, why this flight and childifli reafoning, when immediately before he had obferved, that the hyperbole is founded on human nature ? We could not refift this perfonal flroke of criticifm ; intended not againft our author, for no human creature is exempt from error; but againft the blind veneration that is paid to the ancient claffic writers, without diftinguilh- ing their blemifhes from their beauties. Having examined the nature of this figure, and the principle on which it is ere&ed ; let us proceed to the rules by which it ought1 to be governed. And, in the firft place, it is a capital fault to introduce an hy¬ perbole in the defcription of an ordinary objeft or event; for in fuch a cafe, k is altogether unnatural,, being deftitute of furprife, its only foundation. Take the following inftance, wdiere the fubjetf is extremely familiar, viz. fwimming to gain the fhore after a (hip- wreck. I faw him beat the furges under him. And ride upon their backs: he trod the water p Whofe enmity he flung afide, and breafted The furge moft fwoln that met him : his bold head ’Bove the contentious waves he kept, and oar’d Himfelf with his good arms, in lufty ftrokes To Jhore, that o’er his wave-born bafis bow’d, As Hooping to relieve him. Tempejl, aSi z. Jc. 1. In the next place, it may be gathered from what is faid, that an hyperbole can never fuit the tone of any difpiriting paffion : forrow in particular will never prompt fuch a figure, and for that reafon the follow¬ ing hyperboles muft be condemned as unnatural: K. Richi Aumerle, thou weep’ft, my tender¬ hearted coufin ! We’ll make foul weather with defpifed tears; Gur fighs, and they, (hall lodge the fummer-corn. And make a dearth in this revolving land. Richard II. aft fc. 6, HYP Draw them to Tyber’s bank, and weep your tears Hype Into the channel, till the lowed dream Do kifs the moft exalted (hores of all. Julius Cafar, aft i.Jc. 1. Thirdly, A writer, if he wi(h to fucceed, ought al¬ ways to have the reader in his eye : he ought, in par¬ ticular, never to venture a bold thought or exprefiion, till the reader be warmed and prepared. For this rea¬ fon, an hyperbole in the beginning of a work can ne¬ ver be in its place. Example : Jam pauca aratro jugera regise Moles relinquent. Horat. Carm. lib. 2. ode 15. In the fourth place, The niceft point of all, is to afcertain the natural limits of an hyperbole, beyond which being overftraiaed, it has a bad effe&. Longi¬ nus (chap, iii.), with great propriety of thought, ea¬ ters a caveat againft an hyperbole of this kind : he compares it to a bow-ftring, which relaxes by over- ftraining, and produceth an effedt dire&ly oppofite to what is intended. To afcertain any precife boundary, would be difficult, if not impracticable. We (hall therefore only give a fpecimen of what may be rec¬ koned overftrained hyperboles. No fault is more common among writers of inferior rank ; and inftan- ces are, found even among thofe of the fined tafte j witnefs the following hyperbole, too bold even for an Hotfpur. Hotfpur talking of Mortimer : In fingle oppofition hand to hand. He did confound the bed part of an hour In changing hardiment with great Glendower. Three times they breath’d, and three times did they drink. Upon agreement, of fwift Severn’s flood ; Who then affrighted with their bloody looks, Ran fearfully among the trembling reeds, And hid his crifp’d head in the hollow bank, Blood-ftained with thefe -valiant combatants. Firjl Part Henry IV. aft l.Jc.Cc. Speaking of Henry V. England ne’er had a King until his time; Virtue he had, deferring to command: His brandifh’d fword did blind men with its beamss His arms fpread wider than a dragon’s wings: His fparkling eyes, replete with awful fire, More dazzled, and drove back his enemies. Than mid-day fun fierce bent againft their faces* What (hould I fay ? his deeds exceed all fpeech : He never lifted up his hand, but conquer’d. Firjl Part Henry VI. aft l. Jc. t, Laftly, An hyperbole, after it is introduced with all advantages, ought to be comprehended within the fevveft words poffible : as it cannot be relilhed but in the hurry and fwelling of the mind, aleifurely view dif- folves the charm, and difcovers the defcription to be extravagant at lead, and perhaps alfo ridiculous. This fault is palpable in a fonnet which paffeth for one of the moft complete in the French language: Phillis, in- a long and florid defcription, is made as far to out» (hine the fun as he outfhines the ftars: Le filence regnoit fur la terre et fur 1’onde, L’air devenoit ferain et 1’Olimp vermeil, 4 Es [ 44 ] Hyperbo- HYP L 45 ] HYP Et Pamourex Zephir affranchi du fomei!, Reflufcitoit les fleurs d’une hakine feconde. L’Aurora deployoit Por de fa trefle blonde, Eet femoit de rubis le cbemin du foleil; Enfin ce Dieu venoit au plus grand apparell Qu’il foil jamais venu pour eclairer le monde : Quand la jeune Philis au vifage riant, Sortant de fon palais plusdair que Porient, Fit voir une lumiere et plus vive et plus belle. Sacre Flambeau du jour, n’en foiea point jaloux, Vous parutes alors auffi peu devant elk, Que les feux de la nuit avoient fait devant vous. MaUevtUe. There is in Chaucer a thought expreffed in a Tingle line, which fets a young beauty in a more advanta¬ geous light than the whole of this much laboured poem : Up rofe the fun, and up rofe Emelie. HYPERBOREAN, in the ancient geography. The ancients denominated thofe people and places Hy¬ perborean which were to the northward of the Scy¬ thians. They had but very little acquaintance with thefe Hyperborean regions; and all they tell us of them is very precarious, much of it falfe. Diodorus Siculus fays, the Hyperboreans were thus called by reafon they dwelt beyond the wind Boreas; fig- nifying “ above, or beyond,” and Boreas, the “ north wind.” This etymology is very natural and plaufible ; notwithftanding all that Rudbeck has faid againft it, who would have the word to be Gothic, and to fignify nobility. Herodotus doubts whether or no there were any fuch nations as the Hyper¬ borean. Strabo, who profefTes that he believes there are, does not take hyperborean to fignify beyond Boreas or the north, as Herodotus underflood it: the prepo- fition w’T'p, in this cafe, he fuppofes only to help to form a fuperlative; fo that hyperborean, on his prin¬ ciple, means no more than moji northern : by which it appears the ancients fcarce knew themfelves what the name meant.—Moll of our modern geographers, as Hoffman, Cellarius, &c. have placed the Hyperboreans in the northern parts of the European continent, among the Siberians and Samoieds: according to them, the Hyperboreans of the ancients were thofe in general who lived fartheft to'the north. The Hyperboreans of our days are thofe Ruffians who inhabit between the Volga and the White fea. According to Cluvier, the name Celtes was fynonymous with that of Hy¬ perboreans. HYPERCATALECTIC, in the Greek and La¬ tin poetry, is applied to a verfe that has one or two fyllables too much, or beyond the regular and. juft meafure ; as, Mufa for ores funt Minerva : Alfo, Mufe forores Palladis lugent. HYPERCRITIC, an over-rigid cenfor or critic: sne who will let nothing pafs, but animadverts fe- verely on the flighteft fault. See Criticism. The word is compounded of /'‘per, “ over, above, be¬ yond and xpihx©-, of judex, of judico, Hyperdulia H YPERDU LIA, in the Romifh theology, is the worfhip rendered to the holy virgin. The word is J Greek, virtpUteix, compofed of above, and nvorjhip, fervicc. The worfhip offered to faints is call¬ ed dulia ; and that to the mother of God, hyperdulia, as being fupeiior to the former. HYPERIA (anc. geog.) the feat of the Phasa- cians near the Cyclops, (Homer): fome commentators take it to be Camarina in Sicily ; but, according to others, isfuppofed to be an adjoining ifland, which they take to be Melita, lying in fight of Sicily. And this feems to be confirmed by Apollonius Rhodius. Whence the Phaeacians afterwards removed to Corcyra, called Scheria, Phaacia, and Maoris; having been expelled by the Phoenicians, who fettled in Melita for com¬ merce, and for commodious harbours, before the war of Troy. (Diodorus Siculus.) HYPERICUM, St John’s wort : A genus of the polyandria order, belonging to the poiyadelphia clafs of plants ; and in the natural method ranking under the 20th order, Rotacea. The calyx is quinquepartite ; the petals five; the filaments many, and coalited at the bafe into five pencils ; the feed-veffel is a pencil. Species. Of this genus there are 29 fpecies, moft of them hardy deciduous fhrubs, and under-fhrubby plants, adorned with oblong and oval Ample foliage, and pentapetalous yellow flowers in clufters. The moft remarkable are, 1. The hircinum, or (linking St John’s-wort. This rifes three or four feet high, with feveral fhrubby two-edged flalks from the root, branch¬ ing by pairs oppofite at every joint; oblong, oval,. clofe-fitting oppofite leaves; and at the ends of all the young fhouts, clufters of yellow flowers. Of this there are three varieties; one with ftrong ftalks, fix or eight feet high, broad leaves, and large flowers ; the other with ftrong ftalks, broad leaves, and without any difagreeable odour; the third hath variegated leaves. All thefe varieties are fhiubby ; and flower in June aad July in fuch numerous clufters, that the fhrubs appear covered with them; and pro¬ duce abundance of feed in autumn. 2. The canarien- fu hath fhrubby ftalks, dividing and branching fix or feven feet high ; oblong, clofe-fitting leaves by pairs ; and, at the ends of the branches, clufters of yellow flowers appearing in June and July. 5. The afcyron, or dwarf American St John’s-wort, hath fpreading roots, fending up numerous, {lender, fquare ftalks, a foot long ; oval, fpear-fhaped, clofe-fitting, fmooth leaves by pairs oppoftte ; and, at the end of the ftalks, large yellow flowers. 4. The androfamum, commonly called tutfan, or park-leaves, hath an upright under- fhrubby ftalk, two feet high, branching by pairs op¬ pofite ; and at the ends of the ftalks, clufters of fmall yellow flowers appearing in July and Auguft, and fucceeded by roundifh berry-like black capfules. This grows naturally in many parts of Britain. 5. The balearicum, or wart-leaved St John’s-wort, is a native of Majorca ; and hath a fhrubby ftalk, branching two feet high, with reddifh fcarified branches, .fmall oval leaves warted underneath, and large yellow flowers appearing great part of the year. 6. The moncgynum, , or one-ftyled China hypericum, hath a fhrubby purplifh, ftalk, about two feet high; oblong, fmooth, ftiff, clofe- ■ fitting. HYP [ 46 1 HYP Hypericum fitting leaves, of a {hining green above, and white gated with fpots of white, and is a very fatal kind in Hypnuwpa II . underneath ; clufters of fmall yellow flowers, with co- its poifon ; its bite always bringing on a fleep which II < tns0t' l°ured cups, and only one ftyle, flowering the greateft ends in death. Hypoch*^!* ^.,r—^ I part nf the year. HYPNUM, FEATHER-MOSS, in botany: A gpnno 1 _ ■ — Culture. The four firft fpecies are hardy, and will of the natural order of mufci, belonging to the crypto- *i grow in any foil or fituation ; the three lafl muft be gamia clafs of plants. The anther* is operculated, or potted, in order to have fhelter in the green-houfe in covered with a lid ; the calyptra fmooth; the filament winter. The two firft fpccies propagate very faft by lateral, and rifing oat of a perichaetium, or tuft of leaf- fuckers, which are every year fent up plentifully from lets different from the other leaves of the plant. There the root; and in autumn or fpring may be readily flip- are 46 fpecies, all of them natives of Great Britain ; ped off from the old plants with roots to each, or the none of them, however, have any remarkable proper- whole plant may be taken up and divided into as many ty, except the proliferum and parietinum. The firft parts as there are fuckers and flips with roots, planting is of a very Angular ftrufture, one (hoot growing out the ftrongeft where they are to remain, and the weakeft from the centre of another ; the veil is yellow and in nurfery-rows, where they are to remain a year in Alining; the lid with a kind of long bill; the leaves order to acquire ftrength. They may alfo be propa- not ihining; fometimes of a yellowifh, and fometimes gated by feeds fown in autumn, in a bed of common earth, in drills an inch deep. The other two hardy forts are alfo propagated by flipping the roots in au¬ tumn, or early in the fpring ; and may likewife be raifed in great plenty from feeds. The three other fpecies are propagated by layers and cuttings, planted in pots, and plunged in a hot bed. of a deep green. This mofs covers the furface of the earth in the thickeft (hades, through which the fun never ftiines, and where no other plant can grow. The fecond hath (hoots nearly flat and winged, undivided for a confiderable length, and the leaves Ihining ; but the old (hoots do not branch into new ones as in the preceding fpecies. It grows in woods and (hady places; Properties. The tutfan hath long held a place in and, as well as the former, is ufed for filling up the jhe medicinal catalogues ; but its ufes are very much chinks in wooden houfes. undetermined. The leaves given in fubftance are faid HYPO, a Greek particle, retained in the compofi- to deftroy worms. By diftillation they yield an effen- tion of divers words borrowed from that language ; fi¬ lial oil. The flowers tinge fpirits and oils of a fine terally denoting under, beneath.—In which fenfe it purple colour. Cows, goats, and (heep, eat the plant; horfes and fwine refufe it. The dried plant boiled in water with alum, dyes yarn of a yellow colour; and the Swedes give a fine purple tinge to their fpirits with the flowers. HYPE RIDES, an orator of Greece, was the dif- ciple of Plato and Ifocrates, and governed the Republic of Athens. He defended with great zeal and courage the liberties of Greece ; but was put to death by Anti¬ pater’s order, 322 B. C. He compofed many orations, of which only one now remains. He was one of the ten celebrated Greek orators. HYPERMNESTRA, in fabulous hiftory, one of and the 50 daughters of Danaus king of Argos. She purgation, alone refufed to obey the cruel order Danaus had given to all his daughters, to murder their hufbands the firft night of their marriage ; and therefore faved the fife of Lynceus, after (he had made him promife not to violate her virginity. Danaus, enraged at her difobe- dience, confined her cloftly in prifon, whence Lynceus delivered her fome time after. (lands oppofed to urtp fupra, “ above.” HYPOBOLE, or subjection,(from vwo, and/5«xM», / cajl), in rhetoric, a figure; fo called, when feveral things are mentioned, that feem to make for the con¬ trary fide, and each of them refuted in order. This figure, when complete, confifts of three parts ; a propo- fition, an enumeration of particulars with their anfwer, and a conclufion. Thus Cicero, upon his return from banifhment, vindicates his conduit in withdrawing fo quietly, and not oppofing the faition that ejeited him. See Oratory, n® 81. HYPOCATHARSIS (compounded of under, medicine, a too faint or feeble HYPOCAUSTUM, among the Greeks and Ro¬ mans, a fubterraneous place, where was a furnace to heat the baths. The word is Greek, formed of the prepofition va-o under; and the verb **<«, to burn.—- Another fort of hypocauftum was a kind of kiln to heat their winter parlours. The remains of a Roman hypocauftum, or fweating room, were difcovered un- HYPERSARCOS1S, in medicine and furgery, der ground at Lincoln in 1739. We have an account an excefs of fle(h, or rather a flefhy excrefcence, fuch as thofe generally rifing upon the lips of wounds, &c. HYPHEN, an accent or chara&er in grammar, implying that two words are to be joined, or con- neiled into one compound word, and marked thus -; as pre-ejlablijhed, five-leaved, &c. Hyphens alfo ferve to conneft the fyllables of fuch words as are divided by the end of the line. HYPNOTIC, in the materia medica, fuch medi¬ cines as any way produce fleep, whether called nar¬ cotics, hypnotics, opiates, or fioporifics. HYi NO 1ICUS serpens, the Sleep-finake, \m.oo- logy, the name of an Eaft-Indian fpecies of ferpent, called by the Ceylonefe nintipolong, a word importing ri»e fame fenfe. It is of a deep blackifh brown, varie- of thefe remains in the Philofophical Tranfadlipns, n° 461. $ 29.—Among the moderns, the hypocauftum is that place where the fire is kept which warms a (love or hot-houfe. HYPOCHiERIS, hawk’s-eye, in botany : A ge¬ nus of the polygamia jequalis order, belonging to the fyngenefia clafs of plants; and in the natural method ranking under the 49th order, Compofita. The recep¬ tacle is paleaceous; the calyx a little imbricated ; the pappus glumy. There are four fpecies; none of which have any remarkable property, except the maculata, or fpotted kawk’s-eye. It is a native of Britain, and grows on high grounds. The leaves are oblong, egg- (haped, and toothed ; the Item almoft naked, generally with a Angle branch ; the bloffoms yellow, opening at fix HYP [ 47 1 HYP 'Hypochon- fix in the morning, and clofing at four in the after- l; noon. The leaves are boiled and eaten like cabbage. I Hypofce- Horfes are fond of this plant when green, but not when inium. dry. Cows, goats, and fwine eat it j Iheep are not fond HYPOCHONDRIA, in anatomy, a fpace on each fide the epigaftric region, or upper part of the abdo¬ men. See Anatomy, n° 88. HYPOCHONDRIAC passion, a difeafe in men, fimilar to the hylleric affe&ion in women. See (the /nJex fubjoined to) Medicine. HYPOCISTIS, in the materia medica, an infpif- fated juice obtained from the feffile afarum, much re- fembling the true Egyptian acacia. They gather the fruit while unripe, and exprefs the juice, which they revaporate over a very gentle fire, to the confiftence of an extraft, and then form into cakes, and ex- pofe them to the fun to dry. It is an aftringent of confiderable power; is good againft diarrhoeas and haemorrhages of all kinds ; and may be ufed in redellent gargarifms in the manner of the true aca¬ cia ; but it is very rarely met with genuine in our fhops, the German acacia being ufually fold under its name. HYPOCRISY, u^oxpio-K, in ethics, denotes difiimu- lation with regard to the moral or religious charader. In qther words, it fignifies one who feigns to be what he is not; and is generally applied to thofe who affume the appearances of virtue or religion, without having any thing in reality of either. HYPOGiEUM, ucroj-tfov, formed of under, and yaia earth, in the ancient architedure, is a name com¬ mon to all the parts of a building that are under ground; as the cellar, butteries, and the like places. The term hypogaum was ufed by the Greeks and Ro¬ mans for fubterraneous tombs in which they buried their dead. Hypoceum, Tjto&iov, In aftrology, is a name given to the celeftial houfes which are below the horizon: «nd efpecially the mum cceli, or bottom of heaven. HYPOGASTRIC, an appellation given to the in¬ ternal branch of the iliac artery. HYPOGASTRIUM, in anatomy, the middle part of the lower region of the belly. See Anatomy, n° 88. HYPOGLOSSI, externi, or majores,inanatomy, the ninth pair of nerves, called alfo linguales iff gufiato- rii. See Anatomy, p. 760. col. 1. HYPOGLOTTIS, orHypocLossis, (compofed of vcro under, and y^urlx tongue), in anatomy, is a name given to two glands of the tongue. There are four large glands of the tongue ; two of them called hypo- glottides, fituated under it, near the venae ranulares; one on each fide of the tongue. They ferve to filtrate a kind of ferous matter of the nature of faliva, which they difcharge into the mouth by little duds near the gums. Hypoglottis, or JfypogloJ/ls, in medicine, denotes an inflammation or ulceration under the tongue •, called alfo ranula.. HYPOPYON, in medicine, acolledion of purulent matter under the corner of the eye. HYPOSCENIUM, in antiquity, a partition under the pulpit or logeum of the Greek theatre, appointed for the mufic. HYPOSTASIS, a Greek term, literally fignifying Hypoftaf* fuljlancc, or fubjijlence ; ufed in theology for perfon.— Hypothec^ The word is Greek, vTorao-ic; compounded of " “ under and do, exiflo; “ I ftand, I exill q. d. fuhJiJlentia. Thus we hold, that there is but one nature or efience in God, but three hypojlafes or perfon s. The term hypojlajis is of a very ancient {landing in the church. St Cyril repeats it feveral times, as alfo the phrafe union according to hypqfla/is.. The firft time it occurs is in a letter from that father to Neftorius, where he ufes it inftead of rpoauvoy, the word we com.- monly render perfon, which did not feem expreflive enough. “ The philofophers (fays St Cyril) have allowed three hypojlafes : They have extended the Dir vinity to three hypojlafes: They have even fometimes ufed the word trinity: And nothing was wanting but to have admitted the confubftantiality of the three hy¬ pojlafes, to (how the unity of the divine nature, exclur live of all triplicity in reipedl of diftindlion of nature, and not to hold it neceflary to conceive any refpe&ive inferiority of bypqjlafes ” This term cccafioned great diffentions in the ancient church; firft a mong the Greeks, and afterwards alfo among the Latins. In the council of Nice, hypojlqfit was defined to denote the fame with ejfence or fubjlance; fo that it was herefy to fay that Jefus Chrift was of a different hypojlafis from the Father ; but cuftom altered its meaning. In the neceffity they were under of ex? prelling themfelv.es llrongly againft the Sabellians, the Greeks made choice of the word hypojlajis, and the Latins of/er/ofltfy which change proved the occafion of endlefs difagreement. The phrafe vrorarm, ufed by the Greeks, fcandalized the Latins, whofe ufual way of rendering vxos-a it was hypothecate or mortgaged by the proprietor; i. ) tl0t c ls, but the Romans, looking on fuch advertifements as in¬ jurious to the debtor, forbad the ufe of them. The Roman lawyers diilinguilhed four kinds of hy- pothecas: the conventional, which was with the will and confent of both parties $ the legal, which was ap¬ pointed by law, and for that reafon called tacit; the praetor’s pledge, when by the flight or non-appearing of the debtor, the creditor was put in pofleffion of his effefls; and the judiciary, when the creditor was put in pofleffion by virtue of a fentence of the court. The conventional hypotheca is fubdivided into gene¬ ral and fpecial. The hypotheca is general, when all the debtor’s effefls, both prefent and future, are en¬ gaged to the creditor. It is fpecial, when limited to one or more particular things. For the tacit hypotheca, the civilians reckon no lefs than twenty-fix different fpecies thereof. HYPOTHENUSE, in geometry, the longeft: fide of a right-angled triangle, or that which fubtends the ’right angle. HYPOTHESIS, (formed of ^ (l under,” and S-sorhe{5*;f fe&ions in the primary particles of matter they pleafe ; Hyff°Pus-j juft what figures, what magnitudes, what motions, and * y - what fituations, they find for their purpofe. They alfo feign certain unfeen, unknown fluids, and endue them with the moft arbitrary properties; give them a fubtllty which enables them to pervade the pores of all bodies, and make them agitated with the moft un¬ accountable motions. But is not this to fet afide the real conftitution of things, and to fubftitute dreams in their place ? Truth is fcarce attainable even by the fureft. obfervationsand will fanciful conjeftures ever come at it ? They who found their fpeculations on hy¬ pothefes, even though they argue from them regularly, according to the ftrifteft laws of mechanics, may be faid to compofe an elegant and artful fable; but it is ftill only a fable. Hypothesis is more particularly applied in aftro- nomy to the feveral fyftems of the heavens; or the different ways in which different aftronomers have fup¬ pofed the heavenly bodies to be ranged, moved, &c. The principal hypotbefes are the Ptolemaic, Coper- nican, and Tychonic. The Copernican is now become fo current, and is fo well warranted by obfervation, that the retainers thereto hold it injurious to call it an hypothejis. See Astronomy. HYPOTIPOSTS. See Oratory, n°9i. HYPOXIS, in botany: A genus of the monogynia order, belonging to the hexandria clafs of plants; and in the natural method ranking under the 10th order, Cvronaria. The corolla is divided into fix parts, and perfifting, fuperior; the capfule narrowing at the bafe; the calyx a bivalved glume. HYPSISTARII, (formed from u'f-'vor “higheft),a feft of heretics in the fourth century; thus called from the profefiion they made of worfliipping the moft high God. The do&rine of the Hypfiftarians was an affemblage of Paganifm, Judaifm, and Chriftianity. They ado¬ red the moft high God with the Chriftians; but they alfo revered fire and lamps with the heathens ; and ob- ferved the fabbath, and the diftinftion of clean and un¬ clean things with the Jews. The Hypfiftarii bore a near refemblancc to the Eu- cbites, or Maffah’ans. HYROANIA (anc. geog.), a country of the far¬ ther Afia, lying to the fouth-eaft of the Mai* Hyr- canum ox Cafpium; with Media on the weft, Parthia on the fouth, and Margrana on the weft. Famous for its tygers (Virgil) ; for its vines, figs, and olives, (Strabo). Hyrcavia (anc. geog.) ; a town of Lydia, in the campus Hyrcanus, near Thyatira; fo called from colonifts brought from Hyrcania, a'country lying to the fouth of the Cafpian fea. The people called Hyr- cani Macedones, becaufe a mixed people (Pliny).—An¬ other Hyrcanja, the metropolis of the country called Hyrcania. Thought to be the Tape of Strabo, the Syrinx of Polybius, the Zeudracarta of Arrian, and the Afaac of Ifidorns Characenus.— A third, a ftrong place of Judea, built by Hyrcanus. HYSSOP. See Hyssopus. Hedge-Hr’tsor. See GratiolA. HYSSOPUS, hyssop : A genus of the gymno- fpermia order, belonging to the didynamia clafs of plants. There arc three fpecies; but only one of them, viz. H Y S L 49 ] H Y S Hyfteric viz. the offitinalit, or common hyflbp, is cultivated for H . ufe. This hath under-fhrubby, low, bu/hy ftalks, ‘ ^ ^rnc' , growing a foot and an half high ; fmall, fpear-fhaped, clofe-fitting, oppolite leaves, with feveral fmaller ones rifing from the fame joint; and all the ftalks and branches terminated by ere£t whorled fpikes of flowers, • of different colours in the varieties. They are very hardy plants; and may be propagated either by flips or cuttings, or by feeds. The leaves have an aromatic fmell, and a warm pungent tafte. Befides the general virtues of aromatics, they are particularly recommended in humoural afthmas, coughs, and other diforders of the breaft and lungs ; and are faid notably to promote ex¬ pectoration. Hyffop was generally made ufe of in puriflcations amongft the Jews by way of a fprinkler. Sometimes they added a little wool to it of a fcarlet colour; for example they dipped a bunch of hyffop, fome branch¬ es of cedar and red wool, in water mingled with the blood of a bird, in the purification of lepers. Hyffop, it is probable, grew to a confiderable height in Judaea, fmce the gofpel informs us that the foldiers filled a fponge v^ith vinegar, put it upon a reed (or long Item) of hyffop, and prefented it to our Saviour upon the crofs. HYSTE R.1C affection, or Papon, (formed of vcf/x* “ womb”) ; a difeafe in women, called alfofuffbeation of the 'womb, and vulgarly Jits of the mother. It is a fpafmodico-convulfive affeCtion of the nervous fyftem, proceeding from the womb ; for the fymptoms and cure of which, fee Midicine HYSTEROM proteron, in grammar and rhe¬ toric, a fpecies of the hyperbaton, wherein the proper order of conftruCtion is fo inverted, that the part of any ientence which Ihould naturally come firft is placed laft : as in this of Terence, Vaht et mint, for vivit et •oalet; and in the following of Virgil, Moriamur, & in media arma ruamus, for In media arma ruamus, & moriemur. flate HYSTRIX, in zoology, a genus of quadrupeds belonging to the order of glires, the characters of which are thefe : They have two f re-teeth, obliquely divided both in the upper and under jaw, befides eight grinders ; and the body is covered with quills or prickles. There are four fpecies, vi%. 1. The crijlata, or crefted porcupine, has four toes on the fore feet, five toes on the hind-feet, a crefled head, a fhort tail, and the upper lip is divided like that of a hare. The length of the body is about two feet, and the height about two feet and an half. The porcupine is covered with prickles, fome of them nine or ten inches long, and about -Jth of an inch thick. Like the hedge-hog, he rolls himftlf up in a globular form, in which pofition he is proof againft the attacks of the moft rapacious animals. The prickles are ex¬ ceedingly fliarp, and each of them has five large black and as many white rings, which fucceed one another alternately from the root to the point. Thefe quills the animal can ertCfc or let down at pleafure; when ir¬ ritated,. be beats the ground with his hind-feet, ereCts his quills, (bakes his tail, and makes a confiderable rattling noife with his quills.—Moft authors have af- ferted that the porcupine, when irritated, darts his quills to a confiderable diftance againft the enemy, and that he will kill very large animals by this means. But Voi. IX. Part I. M. Buffon and fome other late naturalifts affure u», that Hyftrtt- the animal poffeffes no fuch power. M. Buffon fre- » " ' quently irritated the porcupine, but never faw any thing like this darting of his quills. He fays indeed, that when the creature was much agitated with paf- fion, fome of the quills which adhered but (lightly to the (kin would fall off, particularly from the tail; and this circumftance, he imagines, has given rife to the miftake. The porcupine, though originally a native of Africa and the Indies, can live and multiply in the more temperate climates of Spain and Italy PHny, and every other natural hiftorian fince the days of A* riftotle, tells us, that the porcupine, like the bear, con¬ ceals itfelf during the winter, and that it brings forth its young tu 80 days. But thefe circumftances re¬ main to this day uncertain. It is remarkable, that although this animal be very common in Italy, no perfon has ever given us a tolerable hiftory of it. We only know in general, that the porcupine, in a dome- (tic (late, is not a fierce or ill-natured animal; that with his foreteeth, which are ftrong and (harp, he can cut through a ftrong board ; that he ea.ts bread, fruits, roots, &c.; that he does confiderable damage when he gets into a garden ; that he grows fat, like moft ani¬ mals, about the end of fummer ; and that his flelh is not bad food. 2. The prebenjilis, or Brajilian porcupine, has four toes cm\h« fore feet, five on the hind-feet, and a long tail. It is confiderably lefs than the former fpecies; being only 17 inches long from the point of the muzzle to the origin of the tail, which is nine inches long; the legs and feet are covered with long brownifl* hair; the reft of the body is covered with quills inter- fperfed with long hairs; the quills are about five inches long, and about -j^th of an inch in diameter. He feeds upon birds and fmall animals. He deeps in the day like the hedge-hog, and fearches for his food in the night. He climbs trees, and fupports himCelf by twill¬ ing his tail round the branches. He is generally found in the high grounds of America from Brafi! to Loui- fiana, and the fouthern parts of Canada. His fldh is efteemed very good eating. A variety of this fpecies is the Hoitzlacnoizin, or Mexican poreupiiK, fie Coendou de Buffon). It is of a duiky colour, with very long briftles intermixed with the down : the fpines three inches long, (lender, and varied with white and yellow; fcarcely apparent ex¬ cept on the tail, which is, according to Hernandez, thicker and (horter than that of the preceding fpecies. He adds, that the tail from the middle to the end is free from fpines ; and that it grows to the bulk of a middle-fized dog. M. de Buffon fays, its length is 16 or 17 inches from the nofe to the tail; the tail 9 French meafure, but taken from a mutilated Ikin. It inhabits the mountains of Mexico, where it lives on the fummer fruits, and may be eafily made tame. The Indians pulverife the quills, and fay they are very ef¬ ficacious in gravelly cafes ; and applied whole to the forehead, will relieve the molt violent headach. They adhere till filled with blood, and then drop off. 3. The dorfata, or Canada porcupine (I’Urfon de Buffon), has four toes on the fore-feet, five on the hind-feet; and has quills only on the back, which are Ihort, and almoft hid among the long hair. He is about two feet long. This fpecies inhabits North G America H Y S [ 50 Hjfltrix. America as high as Hudfon’s Bay; and makes its neft under the roots of great trees. It will alfo climb among the boughs, which the Indians cut down when one is in them, and kill the animal by ftrikingit over the nofe. They are very plentiful near Hudfon’s Bay; and many of the trading Indians depend on them for food, efteeming them both wholefome and pleafant. Thefe animals feed on wild fruits and bark of trees, efpecially juniper : eat fnow in winter, and drink wa¬ ter in fummer ; but avoid going into it. When they cannot avoid their purfuer, they will fidle towards him, in order to touch him with the quills, which feem but | H Y S weak weapons of offence; for on ftroaking the hair, Hyfttl they will come out of the fkin, flicking to the hand. l— The Indians flick them in their nofes and ears, to make | holes for the placing their ear-rings and other finery : | they alfo trim the edges of their deer-flcin habits with fringes made of the quills, or cover with them their 1 bark boxes. 4. The macroura, has five toes both on the hind and forefeet; his tail is very long, and the prickles are 1 elevated. He inhabits the ifles of the Indian Archi¬ pelago, and lives in the forefls. I. Ior t, the ninth letter and third vowel of the al- > phabet, is pronounced by throwing the breath fuddenly againfl the palate, as it comes out of the la¬ rynx, with a fmall hollowing of the tongue, and nearly the fame opening of the lips and talk as in pronoun¬ cing ^ or r. Its found varies: in fome' words it is long as high, .mind, &c. ; in others fhort, as bid, bid, fin, &c.; in others, again, it is pronounced like y, as in collier, onion. See.; and in a few, it founds like ee, as in machine, maga%ine. Sec. No Englifh word ends in i, e being either added to it, 01 elfe the i turned intoy. But befides the vowel, there is the jod confonant ; which, becaufe of its different pronunciation, has like- wife a different form, thus J, j. In Englifh, it has the foft found of g; nor is ufed, but when^foftis required before vowels, where g is ufually hard : thus we fay, jack, jet, join, See. inflead of gack, get, gain, 4cc. which would be contrary to the genius of the Englifh language. I, ufed as a numeral, fignifies one, and ftands for fo many unites as it is repeated times : thus I, one ; II, two; III, three, &c. ; and when put before a higher numeral, it fubcra&s ilfelf, as IV, four; IX, nine, &c. But when fet after it, fo many are added to the higher numeral as there are I’s added: thus VI is 5+1. or fix * V1I» 5+2> or leven » VIlI> 5+3, ■or eight. The ancient Romans likewife ufed 13 for 500, CIO for 1000, 133 for 5000, CCI33 for 10,000,. 1333 for 50,000, and CCCI333 for 100,000. Farther than this, as Pliny obferves, they did not go in their notation ; but, when neceffary, repeated the lafl number, as CCCI333, CCCI333, for 200,000; CCCI333, CCCI333, CCCI333, for 300,000 ; and fo on. The ancients fometimes changed i into u ; as decu- mus for decimus ; maxumus for maximus, &c. According to Plato, the vowel i is proper to exprefs delicate, but humble things, as in this verfe in Virgil which abounds in i’s, and is generally admired : Jccipiunt inimicum imbrem, rimifque fatifeunt. I, ufed as an abbreviature, is often fubflituted for the whole word Jesus, of which it is the firtt letter. JABBOK, a brook on the other file of the Jordan, the fpring whereof is in the mountains of Gilead. It falls into Jordan pretty near the fea of Tiberias, to the fouth of this fea. Near this brook the patriarch Ja¬ cob wreftled with the angel (Gen. xxxii. 22). The Jabbok feparated the land of the Ammonites from the Gaulanitis, and the territories of Og king of Bafhan. Jabesh, or Jabesh-gilead, was the name of a city, in the half tribe of Manaffeh, beyond Jordan. The feripture calls it generally Jabefh-Gilead, becaufe it lay in Gilead, at the foot of the mountains which go by this name. Eufebius places it fix miles from Pella, towards Gerafa; and confequently it mull be eaflward of the fea of Tiberias. JABIRU. See Mycteria. JABLONSKI (Daniel Errteft), a learned Polifh Proteftant divine, born at Damztck in 1660. He be¬ came fucceffively minifter of Magdeburg, Eiffa, Ko- ningiherg, and Berlin ; and was at length ecclefiaftical counfellor, and prefident of the academy of fciences at the latter. He took great pains to effefl an union between the Lutherans and Calvinifts ; and wrote fome works which are in good efteem, particularly Medita¬ tions on the origin of the Scriptures, &c. He died in 1741. Jablonski (Theodore), counfellor of the court of Pruflia, and fecretary of the royal academy of fciences at Berlin, was alfo a man of diftinguifhed merit. He loved the fciences, and did them honour, without that ambition which is generally feen in men of learn ing: it was owing to this modefty that the greateft. part of his works were publiihed without his name. He publifhed, in 1711, a French and German Dic¬ tionary ; a Courfe of Morality, in 1713 ; a Diction¬ ary of Arts and Sciences, in 1721 ; and tranflated Tacitus de moribus Germanorum into High Dutch, in 1724. JABNE. J A C >bne JABNE ( anc. geog.), a town of Paleltine, near It if J°PPa • called yamnia or yamnial, by the Greeks and •' . Romans. In Joflina xv. it feems to be called yabrieel; but in 2 Chron. xxvi. yabne. It was taken from the Phihilines by Uzziah, who demolifhed its fortifications. Its port, called yamnitarum partus., lay between Joppa and Azotus. JACAMAR, in ornithology. See Alcedo. JACCA, an ancient town of Spain, in the king¬ dom of Arragon, with a bifhop’s fee, and a fort ; feated on a river of the fame name, among the moun¬ tains of Jacca, which are part of the Pyrenees. W. Long, o. 19. N. Lat. 44. 22. JACK, in mechanics, a well-known inftrument of common ufe for railing great weights of any kind. The common kitchen-jack is a compound engine, where the weight is the power applied to overcome the fri&ion of the parts and the weight with which the fpit is charged ; and a fteady arid uniform motion is obtained by means of the fly. Jack, in the fea-language, a fort of flag or colours, difplayed from a malt eredted on the outer end of a Ihip’s bowfprit. In the Britifh navy the jack is no¬ thing more than a fmall union flag, compofed of the interfedtion of the red and white crofles ; but in mer- chant-lhips this union is bordered with a red field. See the article Union. Jack is ufed alfo for a horfe or wooden frame to faw timber upon ; for an inftrument to pull off a pair of boots ; for a great leathern pitcher to carry drink in ; for a fmall bowl that ferves as a mark at the exer- cife of bowling ; and for a young pike. yACK-Flag, in a Ihip, that hoifted up at the fprit- fail top-maft head. yACK-Daiv, the Englilh name of a fpecies of cor- vus. See Corvus. This bird is very mifchievous to the farmer and gardener; and is of fuch a thievilh difpofition, that he will carry away much more than he can make ufe of. There is a method of deftroying them by a kind of fprings much ufed in England ; and is fo ufeful, that it ought to be made univerfal.—A ftake of about five feet long is to be driven firmly into the ground, and made fo fail that it cannot move, and fo lharp in the point that the bird cannot fettle upon it. Within a foot of the top there muft be a hole bored through it, of three quarters of an inch diameter; through this hole is to be put a ftick of about eight inches long ; then a horfe-hair fpringe or noofe is to be made fail to a thin hazel-wand, and this brought up to the place where the ihort ftick is placed, and carried with it through the hole, the remainder being left open un¬ der that ftick. The other end of the hazel rod is to be put through a hole in the ftake near the ground, and faftened there. The ilake is to be planted among the jack daw’s food, and he will naturally be led to fettle on it; but finding the point too iharp, he will defcend to the little crofs ftick. This will fink with his weight, and the fpringe will receive his leg, and hold him fail. JACKALL, in zoology. See Canis. JACKSON (Thomas), an eminent Engliih divine, was born at Witton in the biihopric of Durham in I579» a g°od family. He commenced doctor of J A C divinity at Oxford in 1622 ; and at laft was made Jac°l» ? chaplain in ordinary, prebendary of Winchefter, and H . dean of Peterborough. He was a very great fcholar ; Jaco 1 e*,l and died in 1640. His performance upon the Creed is a learned and valuable piece ; which, with his other works, was publiihtd in 1673. JACOB, the fon of Ifaac and Rebekah, was born in the year of the world 2168, before Jefus Chrift 1836. The hiftory of this patriarch is given at large in the book of Genefis. He died in Egypt in the 147th year of his age. Jofeph dire&ed that the body Ihould be embalmed, after the manner of the Egyp¬ tians ; and there was a general mourning for him throughout Egypt for feventy days. After this, Jo¬ feph and his brethren, accompanied with the principal men of Egypt, carried him, with the king of Egypt’* permifiion, to the burying-place of his fathers near Hebron, where his wife Leah had been interred. When they were come into the land of Canaan, they mourned for him again for feven days; upon which occafion the place where' they ftaid was called Abel- mifraim, or the mourning of the Egyptians. Jacob (Ben Hajim), a rabbi famous for the col- It&ion of the Maforah in 1525; together with the text of the bible, the Chaldaic paraphrafe, and Rabbi¬ nical commentaries. Jacob (Ben Naphthali), a famous rabbi of the 5th century : he was one of the principal mafforets, and bred at the fchool of Tiberias in Paleftine with Ben Afer, another principal mafforet. The invention of points in Hebrew to ferve for vowels, and of accents to facilitate the reading of that language, are a- fcribed to thefe two rabbis; and faid to be done in an affembly of the Jews held at Tiberias, A. D. 476. Jacob (Giles), an eminent law-writer, born at Romfey in the county of Southampton, in 1686. He was bred under a confiderable attorney ; and is prin¬ cipally known for his Law Di&ionary in one vol. folio, which has been often printed ; a new and im¬ proved edition having been lately given by counfellors Ruffhead and Morgan. Mr Jacob alfo wrote two dramatic pieces ; and a Poetical Regifter, containing the lives and characters of Engliih dramatic poets. The time of his death is not known. JACOBiEUS (Oliger), a celebrated profeffor of phyfic and philofophy at Copenhagen, was born in 1651 at Arhufen in the peninfula of Jutland, where his father was biihop. Chriitian V. intrufted him with the management of his grand cabinet of curio- fities; and Frederic IV. in 1698, made him coun- fellor of his court of juilice. He wrote many medical works, and fame excellent poems. JACOBINE monks, the fame with Dominicans. JACOBITES, a term of reproach beftowed on the perfons who, vindicating the doftrines of paflive obe¬ dience and non-reiiftance with refpeil to the arbitrary proceedings of princes, difavow the revolution in 1688, and affert the fuppofed rights and adhere to the in- terells of the late abdicated King James and his fa- mfly. Jacobites, in church hiftory, a fe6l of Chriftiana in Syria and Mefopotamia ; fo called, either from Ja¬ cob a Syrian who lived in the reign of the emperor G 2 Mauritius, i 51 i J A D [ 52 3 JAG Jacobui Mauritius, or from one Jacob a monk who flourilhed They are joined together by flioals or funk rocks; .are JafLeer.thc year 55°- . crooked or bent like half a bow; and are dangerous * The Jacobites are of two fefts, fome following the for Ihips in the night-time, becaufe there feems to be rites of the Latin church, and others continuing fe- a paffage between them, to which while the pilots are parated from the church of Rome. There is alfo a payingattention,theynegle&twofmallfunkrockswhich divifion among the latter, who have two rival patri- lie almoft in the middle of the entrance in deep water, archs. As to their belief, they hold but one nature JAFNAPATAN, a fea port town, feated at the in Jefus Chrift ; with refpeft to purgatory and prayers north-eaft end of the ifland of Ceylon in the Eaft In¬ fer the dead, they are of the fame opinion with the dies. The Dutch took it from the Portuguefe in Greeks and other eaftern Chri.tians: they confecrate >658, and have continued in the pofTtffion of it fince unleavened bread at the eucharift, and are againft that time. They export from thence great quantities confeflion, believing that it is not of divine inftitu- of tobacco, and fome elephants, which are accounted tion. the moft docile of any in the whole world. E. Long. JACOBUS, a gold coin, worth 25 (hillings; fo 80. 25. N. Lat. 9. 30. called from King James I. of England, in whofe reign JAGENDORF, a town and caftle of Silefia, ca- it was ftruck. See Coin. pital of a province of the fame name, feated on the ri- We ufually diftinguifh two kinds of Jacobus, the old ver Oppa. E. Long. 17. 47. N. Lat. 50.4. and the new; the former valued at 25 (hillings, weigh- JAGGE RM AUT, a black pyramidal (lone wor- ing fix pennvweight ten grains; the latter, called alfo (hipped by the Gentoos, who pretend that it fell from Carolus, valued at 23 (hillings, in weight five penny- heaven or was miraculoufly prefented on the place weight twenty grains. where their temple (lands. There are many other JACQUINIA, in botany : A genus cf the mono idols of this figure in India; which, however, are all gynia order, belonging to the hexandria clafs of but accounted copies from the Jaggernaut. According plants; and in the natural method ranking with thofe to the bell information Mr Grofe could obtain, this of which the order is doubriul. The corolla is de- (lone is meant to reprefent the power prefiding over cemfid; the (lamina inferted into the receptacle ; the univerfal generation, which they attribute to the ge- feerry monofpermous. neral heat and influence of the fun adling in fubordina- JACULATOR, or shooting-fish. See Ch-e- tion to it. Domeltic idols of the form of the Jag- todon. gernaut. and dillinguilhed by the fame name, are made JADDESSES is the name of an inferior order of by the Gentoos. Thefe are niched up in a kind of priefts in Ceylon, who have the care of the chapels ap- triumphal car, decorated with gilding and tinfel; propriated to the genii, who form a third order of which for fome days they keep in the bed apartment gods among tbefe idolaters. Thefe priefts are applied in their houfe. During this time their devotion con- to by the people in a time of difeafe or calamity, who fills in exhibiting the moft obfeene pollutes, and aft- offer a cock on their behalf to appeafe the anger of the ing all manner of lafeivioufnefs, in fight as it were of daemons. *dol, and as the mod acceptable mode of worlhip TADE-stone, Laims K£-?HwviCV&, or Jafpachates, to that deity it reprefents ; after which they carry it a genus of filiceous earths. It gives fire with (leel, and in its gilded car in proceffion to the Ganges, and is femitranfparent like flint. It does not harden in the throw in all together as an acknowledgment to that fire, but melts in the focus of a burning glafs into a river of its congenial fertilization with that of the fun. tranfparent green glafs with fome bubbles. A kind Formerly this machine was decorated with jewels and brought from the river of the Amazons in America, other expenfive ornaments; but the Indians are now and called circoncifton Jione, melts more eafily in the become lefj extravagant, as they found that the Moors focus into a brown opaque glafs, far lefs hard than the and Chriftians, watching the places where they threw ft one itfelf. The jade-ftone is unftuous to the touch; in their idols, dived for them for the fake of the jewels whence Mr Kirwan feems to fufpeft, that it contains with which they were adorned. a portion of argillaceous earth, or rather magnefia. Our author conjeftures, that this pyramidal form of The fpecific gravity is from 2.970 to 3.389; the tex- the Gentoo idol was originally taken from that of ture granular, with a greafy look, but exceedingly flame, which always inclines to point upwards. From hard, being fuperior in this refpeft even to quartz it- this Indian deity he fuppofes the (hape of the Paphiaa felf. It is infufible in the fire, nor can it be diffolved Venus to have been derived, for which Tacitus could in acids without a particular management ; though not account. This image had nothing of the human M. Sauffure feems to have extrafted iron from it. form in it, but rofe orbicularly from a broad bafis, and Sometimes it is met with of a whitifh milky colour in the nature of a race goal tapering to a narrow con¬ front China; but moftly of a deep or pale green from vex a-top ; which is exaftly the figure of the idol in America. The common lapis nephriticus is of a grey, India, confecrated to fuch an office as that heathen yellowiffi, or olive colour. It has its name from a fup- deity was fuppofed to prefide over, and to which, on pofition of its being capable of giving eafe in nephritic the borders of the Ganges efpeciallys the Gentoo vir- pains, by being applied externally to the loins. It gins are brought to undergo a kind of fuperficial de- may be diftinguiftied from all other (tones by its hard- floration before they are prefented to their huibands. nefs, femipellucidity, and fpecific gravity. (Richard), an ingenious poet, was vicar of JAFFA, the modern name of the city of Joppa in Snitterfield in Wamickfture, and reftor of Kimcote in jU(]ea_ Leicefterihire. He was the intimate friend and corre- JAFFATEEN islands, the name of four ifiands fpondent of Mr Shenftone, contemporary with him at in the Red Sea, vifited by Mr Bruce in his late travels. Oxford, and, it is believed, his fchoolfellow ; was of U- 5 niverfity JAG [ 53 ] J A L Jaj#. niverfityCollege} took the degree of M. A. July9.1739; 1 was author rf feveral poems in the 4th and 5th volumes of Dodfley’s Poems; publifhed a fermon, in 1755, on the Caufes of Impenitence confidered, preached May 4. 1755, at Harbury in Warwickfliire, where he was vi¬ car, on occafion of a converfation faid to have pafled between one of the inhabitants and an apparition in the church yard there; wrote “ Edge-hill,” a poem, for which he obtained a large fubfcription in 1767; and was alfo author of “ Labour and Genius,”, 1 768, 410 ; of “ The Blackbirds,” a beautiful elegy in the Adventurer ; and of many other ingenious performan¬ ces. He died May 28. 1781. St Jago, a large river of South America, which rifcs in the audience of Quito and Peru. It is navigable; and falls into the South Sea, after having watered a fer¬ tile country abounding in cottOn-trees, and inhabited by wild Americans. St Jago, the largeft, moft populous and fertile of the Cape Verd iflands, on the coall of Africa, and the refidence of the Portuguefe viceroy. It lies about 13 miles eaftward from the ifland of Mayo, and a- bounds with high barren mountains; but the air, in the rainy feafon, is very unwholefome to llrangers. Its produce is fugar, cotton, wine, and feme excellent fruits. The animals are black cattle, horfes, affes, deer, goats, hogs, civet-cats, and fome very pretty green monkeys with black faces. St Jagg, a handfome and confiderable town of South America, the capital of Chili, with a good harbour, a bifliop’s fee, and a royal audience. It is feated in a large and beautiful plain, abounding with all the ne- ceffaries of life, at the foot of the Cordilleras, on the ri¬ ver Mapocho, which runs acrofs it from eaft to weft. Here are feveral canals and a dyke, by means of which they water the gardens and cool the ftreets.—It is very much fubjeft to earthquakes. W. Long. 69. 35. S. Lat. 33. 40. St Jago de Cula, a town in North America, fitu- ated on the fouthern coaft of the ifland of Cuba, in the bottom of a bay, with a good harbour, and on a river of the fame name. W. Long. 76. 44. N. Lat. 20. o Jago de los Cavalier os, a town of America, and one of the principal of the ifland of Hifpaniola. It is feated on the river Yague, in a fertile foil, but bad air. W. Long. 70. 5. N. Lat. 19. 40. St Jago del Entero, a town of South America,, one of the moft confiderable of Tucuman, and the ufual refidence of the inquifitor of the province. It is feated on a large river, in a flat country, where there is game, tygers, guanacos, commonly called camel- Jheep, &c. Jago de la Vega, otherwife called Spanljh town, is the capital of the ifland of Jamaica, in the Weft In¬ dies 5 and Hands in 180 it north latitude, and 76° 45' weft longitude. It is about a mile in length, and little more than a quarter of a mile in breadth ; and contains between 500 and 6qo houfes, with about 4000 inhabi¬ tants of all colours and denominations. This town is fituated in a delightful plain, on the banks of the Rio Cobre, 13 miles from Kingfton, and 10 from Port Royal. It is the refidence of the commander in chief: and here the fupreme court of judicature is held, four times in the year, viz. on the laft Tuefdays of February, May, Auguft, and November, and fits three weeks.— St Jago de la Vega is the county-town of Middlefex, and belongs to the parifh of St Catharine ; in which u parifh there are 11 fugar-plantations, 108 pens, and other fettlements, and about 10,000 flaves. JAGUAR, or Jaquar, a name given to the Brafi- lian once, a fpecies of Feus. See Felis, fpec. vi. JAGUEER, in Eaft India affairs, any penfion from the Grand Mogul, or king of Delhi; generally fuch as are afiigned for military (ervices. JAGUEERDAR, the holder or poffeffor of a ja- gueer. It comes from three Perfian words, Ja ” a place ;” gueriftun “ to take and da/hlun “ to hold qtiaft “ a place holder or penfioner.” In the times of the Mo^ul empire, all the great officers of the court, called omrahs. were allowed jagueers, either in lands of which they colle&ed the revenues, or affignments upon the revenues for fpecified fums, payable by the lord lieu¬ tenant of a province : which fums were for their main¬ tenance, and the fupport of fuch troops as they were neceffitated to bring into the field when demanded by the emperor, as the condition of their jagueers, which were always revokable at pleafure. JAIL-fever, a very dangerous diftemper of the contagious kind, arifing from the putrefeent difpofi- tion of the blood and juices. See (the Index fubjoined to) Medicine. JALAP, in botany and the materia medica, the root of a fpecies of convolvulus or bind-weed. See Convolvulus. This root is brought to us in thin tranfverfe flices from Xalapa, a province of New Spain. Such pieces fhould be chofen as are moft compaA, hard, weighty, dark-coloured, and abound moll with black circular ftrise. Slices of bryony root are faid to be fometimes mixed with thofe of jalap : thefe may be eafily diftin- guilhed by their whiter colour and left compaft tex¬ ture. This root has no fmell, and very little talte upon the tongue ; but when fwallowed, it affedls the throat with a fenfe of heat, and occafions a plentiful difeharge of faliva. Jalap in fubftance, taken in a dofe of about half a dram (left or more, according to the circum- ftances of the patient) in plethoric, or cold phlegmatic- habits, proves an effediual, and in general a fafe purga¬ tive, performing its office mildly, feldom occaiioning naufea or gripes, which too frequently accompany the other flrong cathartics. In hypochondriacal diforde,rs, and hot bilious temperaments, it gripes violently if the jalap be good ; but rarely takes due. effedl as a purge. An extrad made by water purges almoft univerfally, but weakly ; and at the fame time has a confiderable ef- fed by urine. The root remaining after this procefa- giipes violently. The pure refin, prepared by fpirit of wine, occafions moft violent gripings, and other diltref— fing fymptoms, but fcarce proves at all cathartic: tri¬ turated with fugar. or with almonds into the form of an emulfion. or diffolved in fpirit, and mixed with fy- rups, it purges plentifully in a fmall dofe, without oc- cafioning much diforder : the part of the jalap remain¬ ing after the reparation of the refin. yields to water an extrad, which has no effed as a cathartic, but operates powerfully by urine. Its officinal preparations are an extrad made with water and fpirit, a Ample tindure,, and a compound powder.—Frederick Hoffman parti- calarly JAM [ J4 1 JAM Jaiemus cularly cautions againft giving this medicine to chil¬ li dren ; and allures us, that it will dellroy appetite, wea- Jamaica. ken tjje body, and perhaps occafion even death. In ^ this point, this celebrated praftitioner was probably de¬ ceived : children, whole veffels are lax, and the food foft and lubricating, bear thefe kinds of medicines, as Geoffrey obferves, better than adults ; and accordingly inoculators make much ufe of the tindture mixed with Ample fyrup. The compound powder is employed in dropfy, as a hydragogue purge ; and where ftimulus is not contraindicated, jalap is confidered asafafe cathartic. JALEMUS, in antiquity, a kind of mournful fong, ufed upon occafion of death, or any other af¬ fecting accident. Hence the Greek proverbs had their original, oixgoTtpoft or j. e. more fad or colder than a jaiemus, “( r»f icc/uMf lylgarrioc, worthy to be ranked among jalemufes. JAMADAR: An officer of horfe or foot, in Hin- dollan. Alfo the head or fuperintendant of the Peons in the Sewaury, or train of any great man. JAMAICA, an ifland of the Weft Indies, the largeft of the Antilles, lying between i f and 190 N. Lat. and between 76° and 790 W. Long. > in length near 170 miles, and about 60 in breadth. It approaches in its figure to an oval. The windward paffage right before it hath the ifland of Cuba on the weft, and Hifpaniola on the eaft, and is about 20 leagues in breadth. This ifland was difeovered by admiral Chriftopher Columbus in his fecond voyage, who landed upon it May 5. 1494 ; and was fo much charmed with it, as al¬ ways to prefer it to the reft of the iflands: in confe- quence of which, his fon chofe it for his dukedom. It was fettled by Juan d’ Efquivel A. I). 1509, who built the town, which, from the place of his birth, he called Seville, and 11 leagues farther to the eaft flood Me- lilla. Orifton was on the fouth fide of the ifland, feated on what is now called Blue Fields River. All thefe are gone to decay ; but St Jago, now Spanilh Town, is ftill the capital. The Spaniards held this country 160 years, and in their time the principal commodity was cacao; they had an immesfe flock of horfes, afles, and mules, and prodigious quantities of cattle. The Englifh landed here under Penn and Venables, May 11. 1654, and quickly reduced the ifland. Cacao was alfo their principal commodity till the old trees decay¬ ed, and the new ones did not thrive ; and then the planters from Barbadoes introduced fugar-canes, which hath been the great ftaple ever fince. The profpeA of this ifland from the fea, by reafon of its conftant verdure, and many fair and fafe bays, is wonderfully pleafant. The coaft, and for fome miles within, the land is low ; but removing farther, it rifes and becomes hilly. The whole ifle is divided by a ridge of mountains running eaft and weft, fome rifing to a great height: and thefe are compofed of rock, and a very hard clay ; through which, however, the rains that fall inceffantly upon them have worn long and deep cavities, which they call gullies. Thefe moun¬ tains, however, are far from being unpleafant, as they are crowned even to their fummits by a variety of fine trees. There are alfo about a hundred rivers that iffue from them on both fides; and, though none of them are navigable for any thing but canoes, are both plea- fing and profitable in many other refpe&s, The cli¬ mate, like that of all countries between the tropics, is very warm towards the fea, and in marfhy places un¬ healthy ; but in more elevated fituations, cooler; and, where people live temperately, to the full as wholefome as in any part of the Weft Indies. The rains fall hea¬ vy for about a fortnight in the months of May and O&ober; and, as they are thecaufe of fertility, are ftyled feafons. Thunder is pretty frequent, and fometimes (howers of hail: but ice or fnow, except on the tops of the mountains, are never feen ; but on them, and at no very great height, the air is exceedingly cold. The moft eaftern parts of this ridge are famous un¬ der the name of the Blue Mountains. This great chain of rugged rocks defends the fouth fide of the ifland from thofe boifterous north-weft winds, which might be fatal to their produce. Their ftreams, though fmall, fupply the inhabitants with good water, which is a great blelfing, as their wells are generally brackifti. The Spaniards were perfuaded that thefe hills abounded with metals: but we do not find that they wrought any mines ; or if they did, it was only copper, of which they faid the bells in the church of St Jago were made. They have feveral hot fprings, which have done great cures. The climate was certainly more temperate be¬ fore the great earthquake ; and the ifland was fuppofed to be out of the reach of hurricanes, which fince then it hath feverely felt. The heat, however, is very much tempered by land and fea breezes ; and it is afierted, that the hotteft time of the day is about eight in the morning. In the night, the wind blows from the land on all fides, fo that no (hips can then enter their ports. In an ifland fo large as this, which contains above five millions of acres, it may be very reafonably con¬ ceived that there are great variety of foils. Some of thefe are deep, black, and rich, and mixed with a kind of potter’s earth; others (hallow and fandy; and fome of a middle nature. There are many favannahs, or wide plains, without ftones, in which the native Indians had luxuriant crops of maize, which the Spaniards turned into meadows, and kept in them prodigious herds of cattle. Some of thefe favannahs are to be met with even amongft the mountains. All thefe different foils may be juftly pronounced fertile, as they would cer¬ tainly be found, if tolerably cultivated, and applied to proper purpofes. A fufficient proof of this will arife from a very curfory review of the natural and artificial produce of this fpacious country. It abounds in maize, pulfe, vegetables of all kinds, meadows of fine grafs, a variety of beautiful flowers, and as great a variety of oranges, lemons, citrons, and other rich fruits. Ufeful animals there are of all forts, horfes, affes, mules, black cattle of a large fize, and flieep, the flefh of which is well tailed, though their wool is hairy and bad. Here are alfo goats and hogs in great plenty ; fea and river fifli; wild, tame, and water-fowl. Amongft other commodities of great value, they have the fugar-cane, cacao, indigo, pimento, cotton, ginger, and coffee; trees for timber and other ufes, fuch as mahogany, manchineel, white wood, which no worm will touch, cedar, olives, and many more. Befides thefe, they have fuftick, red wood, and various other materials for dyeing. To thefe we may add a multi¬ tude of valuable drugs, fuch as guaiacum, china, farfa- parilla, caffia, tamarinds, vanellas, and the prickle-pear jam [55 or opuntia, which produces the cochineal 5 with no in- J confickrable number of odoriferous gums. Near the cdafl they have falt-ponds, with which they fupply their own confumption, and might make any quantity they pleafed. As this ifland abounds with rich commodities, it is happy likewife in having a number of tine and fafe ports. Point Morant, the eaftern extremity of the ifland, hath a fair and commodious bay. Faffing on to the fouth, there is Port Royal : on a neck.of land which forms one fide of it, there flood once the faireft town in the ifland ; and the harbour is as fine a one as can be withed, capable of holding a thoufand large veflels, and ftill the ftation of our fquadron. Old Harbour is alfo a convenient port, fo is Maccary Bay ; and there are at lead twelve mo.re between this and the weftern extremity, which is point Negrillo, where our ihips of war lie when there is a war with Spain. On the north fide there is Grange Bay, Cold Harbour, Rio Novo, Montego Bay, Port Antonio, one of the fineft in the ifland, and feveral others. The north- 1 JAM The honourable the council confifts of a prefident Jamaica, and 10 members; with a clerk, at L.270, chaplain L. 100, ulher of the black rod and meflenger L. 250. The honourable the afiembly confifts of 43 members, one of whom is chofen fpeaker. To this affembly be; long a clerk, with L. 1000 falary ; a chaplain, L. 150 ; meflenger, L. 700 ; deputy, L. 140 ; and printer, L. 200. The number of members returned by each parifh and county are, for Middlefex 17, viz. St Catharine 3, St Dorothy 2, St John 2, St Thomas in the Vale 2, Cla¬ rendon 2, Vere 2, St Mary 2, St Ann 2 : For Surry 16, viz. Kingfton 3, Port Royal 3, St Andrew 2, St David 2, St Thomas in the Eaft 2, Portland 2, St George 2 : For Cornwall IQ, viz. St Elizabeth 2, Weftmoreland 2, Hanover 2, St James 2, Trelaw- ney 2. The high court of chancery confifts of the chancel¬ lor (governor for the time being), 25 mafters in ordi¬ nary, and 20 mafters extraordinary; a regifter, and clerk of the patents ; ferjeant at arms, and mace-bear- weft winds, which fometimes blow furioufly on this er. The court of vice admiralty has a foie judge, judg( coaft, render the country on that fide lefs fit for canes, but pimento thrives wonderfully ; and certainly many other ftaples might be raifed in fmall plantations, which are frequent in Barbadoes, and might be very advan¬ tageous here in many refpeCts. The town of Port Royal flood on a point of land running far out into the fea, narrow, fandy, and inca- furrogate, and commiflary, King’s advocate, principal regifter, marlhal, and a deputy-marlhal. The court of ordinary, confifts of the ordinary (governor for the time being), and a clerk. The fupreme court of judicature, has a chief juftice, L. 120, and 16 affiftant judges; at¬ torney-general, L. 400 ; clerk of the courts, L. 100; clerk of the crown, E. 350; folicitor for the crown ; pable of producing anything. Yet the excellence of 33 commiffioners for taking affidavits; a provoft-mar- the port, the convenience of having Ihips of feven hun¬ dred tons coming clofe up to their wharfs, and other advantages, gradually attrafted inhabitants in fuch a manner, that though many of their habitations were built on piles, there were near two thoufand houfes in the town in its moft flourilhing ftate, and which let at high rents. The earthquake by which it was over- thrown happened on the 7th of June >692, and num¬ bers of people periftied in it. This earthquake was dial-general, and eight deputies; J 8 barrifters, befides the attorney-general and advocate-general; and upward of 120 praftifing attornies at law. The commerce of Jamaica is very confiderable, not only with all parts of Great Britain and Ireland, but with Africa, North and South America, the Weft In« dia iflands, and the Spanifti main. The fliips annually employed are upwards of 500 fail. The following account of the exports of this ifland" followed by an epidemic difeafe, of which upwards of in 1770, as given by Abbe Raynal, but which in feve- three thoufand died : yet the place was rebuilt; but the ral particulars appears to be under rated, will contri- greateft part was reduced to allies by a fire that hap- bute more than all that hath been faid, to fliow the pened on the 9th of January 1703, and then the. inha- importance of Jamaica. They conlifted in 2249 bales bitants removed moftly to Kingfton. It was, however, of cotton, which at 10 pounds per bale, the price in rebuilt for the third time; and was raifing towards its the ifland, amountsto 22,490!. ; 1873 hundredweight former grandeur, when it was overwhelmed by the fea, of coffee, at three pounds five ftiillings per hundred, Auguft 28. 1722. There is, notwithftanding, a fmall 6088 I ; 2753 bags of ginger, at two pounds five town there at this day. Hurricanes fince that time have often happened,andoccafionedterrible devaftations. The ifland is divided into three counties, Middlefex, Surry, and Cornwall; containing zoparifhes, over each of which prefides a magiftrate ftyled a cu/los; but thefe parilhes in point of fize are a kind of hundreds. The fhilhngs per bag, 6194I. ; 2211 hides, at feven Ihil- lings per hide, 773 1. ; 16,475 puncheons of rum, at 10I. per puncheon, 164,7501.' Mahogany, 15,282 pieces and 8500 feet, 50,000 L Gf pimento, 2,089,734 pounds weight, 52,243 1. Sugar, 57,675 hoglheadsr- 6425 tierces, 52 barrels, at feventeen pounds ten Ihil- whole contain 36 towns and villages, 18 churches and lings per hoglhead; twelve pounds per tierce, and four chapels, and about 23,000 white inhabitants. pounds per barrel; amounting in the whole to The adminiftratiou of public affairs is by a gover- 1,086,620 1. Sarfaparilla, 305 bags, at ten pounds nor and council of royal.appointment, and the repre- per bag, 22501. Exports to Gfeat Britain andlre- fentatives of the people in the lower houfe of affembly. land, 1,391,210!. To North • America, 146,324!. They meet at Spanilh Town, and things are conduced To the other iflands, 595 1. Total of the exports, with great order and dignity. The lieutenant-gover- 1,538,730!. nor and commander in chief has L. 5000 currency, or The following is a general view of the property and' L. 35571 : 8 : 6^, Sterl. befides which, he has a houfe in chief produce of the whole ifland in 1786, as prefixed. Spanilh-town, a pen or a farm adjoining, and a polink or by Mr Beckford to his deferintive account of Ja- mountain for provifions ; a fecretary, an under-fecreta- matca f ry, and a. domeftic chaplain. Counties. f JntroiJ P 2^* Jamaica lanbic Counties. Sugar Eftates. Middlefex Surry - Cornwall Total A M Other Settle Ptents, 917 540 56f 2018 iProdace, Slaves. Hhds. of j Sugar. 87100 ( 31500 75600 | 34900 90000 39000 255700 105400 [ 56 J JAM It fhould be here obferved, that where two hogs- Jamaica Cattle. heads of fugar are made, there is at lealt one puncheon . . of rum ; but the proportion has been of late years■* , —— more confiderable: the quantity of the latter will 75000 therefore be 52,700 puacheona. 80000 69500 22450a A comparative view between the years 1768 and 1786. Middlefex jj Surry in in 1768 1786 1768 1786 Sugar Eltates; 239 Sugar Hhds. j 24050 Negroes Cattle 66744 323 31500 87100 146 15010 39542 Cornwall in 1768 1786 350}) 266 34900 J: 29100 388 39000 75600 jj 60614 93000 59510 75000 21465 80000 ji 54775 69500 From the above fcheme it appears, how confider- able has been the increafe of fugar-eftates, and confe- quently of produce of negroes and cattle m eighteen years: and in the fame portion of time (it is faid), if proper encouragement were given, they might be augmented in a threefold proportion. The common valuation of an eftate in Jamaica as follows : Cane land (the canes upon it valued Sterling feparately) at - - ^ 22 per acre. Total in 1768 1786 651 68160 1061 105400 166900 255700 88800 135750 224500 Amount of Increale. 41a 3724a 88750 1 ratoons and young plants 15 4 14 57 Plants Cane land, i: Failure land Wood land Provifions Negroes Mules Steei s Breeding cattle, &c. Works, water, carts, &c. - - from 7 to 10,000 If a planter would wiih to leafe his eilate for a num¬ ber of years, his income would be large if he could get only led. fterling a day for his negroes (the lofs made good), without requiring any thing for his land or works. ditto. ditto. ditto. ditto. ditto. ditto. ditto. ditto. ditto. JAMBI, or Jambis, a fea-port town and fmall kingdom of Afia, on the eaftern coaft of the iiland of Sumatra. It is a trading place. The Dutch have a fort here; and export pepper from thence, with the beft fort of canes. E. Long. 103. 55. S. Lat. o. 30. JAMBIA Vicus. See Yambo. IAMBIC, in ancient poetry, a fort of verfe, fo called from its cor.fifting either wholly, or in great part, of iambus’s. See Iambus. Ruddiman makes two kinds of iambic, viz. dimeter and trimeter ; the former containing four feet, and the latter fix. And as to the variety of their feet, they N° 162. con fill wholly of iambus’s, as in the two following vor- fes of Horace : 1234 5 6 Dim. Inar\fit a\Jluo\fius\ Trim. Suis\ iff i\pfa Ro\ma vi\ribus\ruit. Or, a dadtylus, fpondeus, anapeltus, and fometimes tribrachys, obtain in the odd places; and the tri- brachys alfo in the even places, excepting the laft. Examples of all which may be feen in Horace ; as. Dimeter. 1.2 3.4 5 6 Canieli\a tra\£lavit\dapes\ Vide\re prope\rantes domum\ Trimeter. Quo qub\fcek\Jli rui\tis\aut\cur dex\teris. Prius\que ca\lumin\ferius\mari. Jlliti\bus at\que cant\bus hoini\cid' He\£lofvm-. Pavidum\que lepo\r' aut ad\venam laqueo\gruem. JAMBLICUS, the name of two celebrated Plato* nie philofophers, one of whom was of Colchis, and the other of Apamea in Syria. The firft., whom Julian equals to Plato, was the difciple ol Anatolius and Porphyry, and died under the reign of the emperor Conftantine.—The fecond alfo enjoyed great reputa¬ tion. Julian wrote feveral letters to him, and it is faid he was poifoned under the reign of Valens. It is not known to which of the two we ought to attribute the works we have in Greek under the name of Jam- blicus, viz. 1. The hiftory of the life of Pythagoras, and the feft of the Pythagoreans. 2. An exhortation to the (ludy of philofophy. 3. A piece againft Por¬ phyry’s letter on the myfteries of the Egyptians. JAMBOLIFERA, in botany: A genus of the monogynia order, belonging to the o&andria cl afs of plants ; and in the natural method ranking with thofe of which the order is doubtful. The calyx is quadri- dented ; the corolla tetrapetalous, and funnel-lhaped ; the filaments a little plane ; the ftigma fimple. IAMBUS, JAM t J7 . 3 JAM lamkis IAMBUS, in the Gteek and Latin profody, a James, poetical foot, confifting of a fliort fyllable followed by a long One ; as in 9fw s-t.ya, £)ci, meas. Syllaba longa Irevi fuljeHa vacatur iambus, as Horace exprefles it; who alfo calls the iambus a fwift, rapid foot, pcs citus. The word, according to feme, took its rife from iambus, the fon of Pan and Echo, who invented this foot; or, perhaps, who only ufed {harp-biting expref- •fions to Ceres, when afllifted for the death of Profer- ’pine. Others rather derive it from the Greek ve- netmm “ poifon or from malcdico “ I rail, or revile becaufe the verfes compofcd of iambus’s •were at firft only ufed in fatire. JAMES (St.) called the Greater, the fon of Zebe- idee, and the brother of John the evangelift, was born at Bcthfaida, in Galilee. He was called to be an apoftle, together with St John, as they were mending their nets with their father Zebedee, who was a filher- man ; when Chrift gave them the name of Boanerges^ or Sons of Thunder. They then followed Chrift, were witneffes with St Peter of the transfiguration on mount Tabor, and accompanied our Lord in the garden of ‘‘olives. It is believed that St James firft preached the •gofpel to the difperfed Jews ; and afterwards returned \o Judea, where he preached at Jerufalerr, when the Jews raifed up Herod Agrippa againft him, who put him to a cruel death about the year 44. Thus St James was the firft of the apoftles who fuffered martyr¬ dom. St Clement of Alexandria relates, that his ac- 'cufcr was fo ftruck with his conftancy, that he became converted and fuffered with him. There is a magni¬ ficent church at Jerufalem which bears the name of St James, and belongs to the Armenians. The Spa¬ niards pretend, that they had St James for their a- ’pofile, and boaft of pofleffing his body ; but Baronius, •in his Annals, refutes their pretenfions. James (St.), called the Lefs, an apoflle, the brother of Jude, and the fon of Cleophas and Mary the fifter of the mother of our Lord, is called in Scripture the JuJl, and the brother of Jefus, who appeared to him in particular after his refurre&ion. He was the firft hifhop of Jerufalem, when Ananias II. high prieft of the Jews, caufed him to be condemned, and delivered him into the hands of the people and the Pharifees, who threw him down from the fteps of the temple, ■when a fuller dafhed out his brains with a club, about the year 6a. His life was fo holy, that jofephus con- fiders the ruin of -Jerufalem as a punifhment infli&ed on that city for his death. He was the author of the epiftle which bears his name. St James of the Sword, (San Jago del EfpadaJ, a military order in Spain, inftituted in i 170, under the reign of Ferdinand II. king of Leon and Gallicia. Its end was to put a ftop to the incurfions of the Moors; three knights obliging themfelves by a vow to fecure the roads. An union was propofed and agreed to in n 70 between thefe and the canons of St Eloy ; and the order was confirmed by the pope in 1175. The higheft. dignity in that order is that of grand mafter, ■which lias been united to the crown of Spain. The knights are obliged to make proof of their defeent from families that have been noble for four generations on both fides; they mull alfo make it appear, that their Vox,. IX. Part I. faid anceftors have neither been Jews, Saracens, nor heretics ; nor even to have been called in queftion by the inquifition. The novices are obliged to ferve fix months in the galleys, and to live a month in amonaftery. Here¬ tofore they were truly religious, and took a Vow of celi¬ bacy ; but Alexander HI. gave them a permiffion to marry. They now make no vows but of poverty, obe¬ dience, and conjugal fidelity ; to which, fince the year 1652, they have added that of defending the immacu¬ late conception of the holy Virgin. Their habit is a white cloak, with a red crofs on the breaft. This is efteemed the moft confiderable of all the military or¬ ders in Spain : the king carefully preferves the office of grand mafter in his own family, on account of the rich revenues and offices, whereof it gives him the dif pofal. The number of knights is much greater now* than formerly, all the grandees choofing rather to be received into this than into the order of the golden fleece ; inafmuch as this puts them in a fair way of at¬ taining to commands, and gives them many confider¬ able privileges in all the provinces of Spain, but efpe- cially in Catalonia. James, the name of feveral kings of Scotland and of Great Britain. See {Hijlaries of) Scotland and Britain. James I. king of Scotland in 1425, the firft of the houfe of Stuart, .was not only the moil learned king, •but the moft learned man of the age in which he flourilhed. This ingenipns and amiable prince fell in¬ to the hands of the enemies? of his country in his ten¬ der youth, when he was flying from the fnares of his unnatural ambitious uncle, who governed his domi¬ nions, and was fufpefted of defigns againft Iris life. Having fecretly embarked fijr France, the fhip was ta¬ ken by an Engliih privateer off Flamborough-head; and the prince and his attendants (among whom was the earl of Orkney) were confined in a neighbouring caftle until they were fent to London. See (Hijlory of) Scotland. The king of England knew the value of the prize he had obtained, and kept it with the moft anxious care. The prince was conduced to the Tower of London immediately after he was foized, April 12. A. D. 1405, in the 13th year of his age ; and there kept a clofe prifoner till June 10. A. D. 1407, when he was removed to the caftle of Nottingham, from whence he was brought back to the Tower, March 1. A. D. 1414, and there confined till Auguft 3. in the fame year, when he was conveyed to the caftle of Windfor, where he was detained till the fummer of A. D. 1417; when Henry V. for political reafons, carried him with him into France in his fecond expe¬ dition. In all thefe fortrelfes, his confinement, from his own account of it, was fo fevere and ftridl, that he was not fo much as permitted to take the air. In this melancholy fituation, fo unfuitable to his age and rank, books were his chief companions, and ftudy his greateft pleafure. He rofe early in the morning, im¬ mediately applied to reading, to divert him from pain¬ ful refleftions on his misfortunes, and continued his ftudies, with little interruption, till late at night. James being naturally fenfible, ingenious, and fond of knowledge, and having received a good education in his early youth, under the direction of Walter Ward- law bifhop of St Andrew’s, by this clofe application to ftudy, became an univerfal fcholar, an excellent H poet. J A M C 58 ] JAM James, poet, and exquilite mufician. That he wrote as well life. In the monuments of his genius, he hath been James4 as read much, we have his own tellimony, and that of almoft equally unfortunate. No veftiges are now r all our hiftorians who lived near his time. Bowma- ker, the continuator of Fordun, who was his con- maining of his Mil in architecture, gardening, and painting ; though we are affured by one who was well temporary, and perfonally acquainted with him, acquainted with him, that he excelled in all thefe arts fpends ten chapters in his praifes, and in lamenta¬ tions on his death ; and, amongft other things, fays, Many of the productions of his pen have alfo perilh-li,>’ l6‘ , ed ; for he tells us himfelf that he wrote much f ; and ^King's * that his knowledge of the fcriptures, of law, and we know of only three of his poems that are now ex- Quc philofophy, was incredible. HeCtor Boyfe tells , us, that Henry IV. and V. furnithed their royal pri- foner with the beft teachers in all the arts and fcien- ces; and that, by their afliftance, he made great pro¬ ficiency in every part of learning and the line arts; that he became a perfeCt mafter in grammar, rhetoric, poetry, mufic, and all the fecrets of natural philofo¬ phy, and was inferior to none in divinity and law. He ©bferves further, that the poems he compofed in his aative tongue were fo beautiful, that you might eafily perceive he was born a poet ; but that his Latin poems were not fo faultlefs ; for though they abounded in the moft fublime fentiments, their langrfege was not fo pure, owing to the rudenefs of the times in which he lived. This prince’s fie ill in mufic was remarkable. ■Walter Bower abbot of Inch-colm, who was intimate¬ ly acquainted with that prince, affures us, that he ex¬ celled all mankind in that art both vocal and inftru- mental; and that he played on eight different tant, viz. Chrift’s Kirk on the Green—Peebles at the Cant0 1 Play—and the King’s Quair, which was lately difco* ftaiK r3* vered by Mr Warton, and hath been publifhed by ano¬ ther gentleman J. But flender as thefe remains are, 1See PeeL they afford fufficient evidence, that the genius of th\scaj~ema,% royal poet was not inferior to that of any of his con- temporaries; and that it was equally fitted for the and War-1 gayeft or the graveft ftrains. ton’s James II. king of Scotland, 1457, fucceeded biSp0^vol,| father, being then not feven years of age ; and was^ killed at the fiege of Roxburgh in 1460, aged 29. James III. king of Scotland, fucceeded his father, in 1460, in the 7th year of his age. The moll ftriking feature in the character of this prince, unjuftly repre- fented as tyrannical by feveral hiftorians, was his fond- nefs for the fine arts, and for thofe who excelled in them, on whom he beftowed more of his company, confidence, and favour, than became a king in his circumftances. This excited in his fierce and haugh- ftruments (which he names), and efpecially on the ty nobles diflike and contempt of their fovereign, and harp, with fuch exquifite fkill, that he feemed to be * Seethren. infpired *. King James was not only an excellent Hi. performer, but alfo a capital compofer, both of facred 9.48. and fecular mufic; and his fame on that account was extenfive, and of long duration. Above a century af¬ ter his death, he was celebrated in Italy as the inven¬ tor of a new and pleafing kind of melody, which had been admired and imitated in that country. This appears from the following teftimony of Aleffandro Tafibni, a w'riter who was well informed, and of un¬ doubted credit. “ We may reckon among us mo¬ derns, James king of Scotland, who not only compo¬ fed many facred pieces of vocal mufic, but alfo of him- indignation againft the objefts of his favour^; which produced the moft; pernicious confequences, and ended in a rebellion that proved fatal to James, who was flain in 1488, aged 36. James IV. king of Scotland, fucceeded his father in 1488. He was a pious and valiant prince ; fub- dued his rebellious fubjefts ; and afterwards, taking part with Louis XII. againft Henry VIII. of Eng¬ land, he was flain in the battle of Flouden-Field in 1513, aged 41.—This king is acknowledged to have had great accomplilhments both of mind and body. His Latin epiftles are claffical, compared with the bar¬ barous ftyle of the foreign princes with whom he cor- felf invented a new kind of mufic, plaintive and melan- refponded. Like his father, he had a tafte for the fine choly, different from all other ; in which he hath been arts, particularly that of fculpture. The attention 'mitated by Carlo Gefualdo prince of Venofa, who, in he paid to the civilization of his people, and his diltri- our age, hath improved mufic with new and admi table inventions. ”f As the prince of Venofa imitated bution of juftice, merit the higheft praife. After all,. the virtues of James appear to have been more fliining ^TaJJ^Pen- king James, the other muficians of Italy imitated the than folid ; and his charadler was that of a fine gentle- "Hb. 10.Sir ’ John Haw- kin’s, vo). 4. P.5,6. J Id. vol. 3. jp. a 13. .prince of Venofa. “ The moft noble Carlo Gefual¬ do, the prince of muficians of our age, introduced fuch a ftyle of modulation, that other muficians yielded the preference to him ; and all fingers and players on _ u ftringed inftruments, laying afide that of others, every fome, vigorous, and active, where embraced his J. All the lovers, therefore, of not appear, that either he, Italian or of Scotch mufic, are much indebted to the admirable genius of king James I. who, in the gloom -and folitude of a prifon, invented a new kind of mufic, plaintive indeed, and.fuited to his fituation, but at the fame time fo fweet and fopthing, that it hath given pleafure to millions in every fucceeding age. As James I. of Scotland was one of the moft ac- complilhed princes that ever filled a throne, he was alfo one of the moft unfortunate. After fpending al- moft 20 years in captivity, and encountering many difficulties on his return into his native kingdom, he man and a brave knight, rather than a wife or a great monarch. At the time of his death, he was only in his forty-firft year. Like all the princes of his family (to his great grandfon James VI-) his perfon was hand- From their coins it does • any of his predeceflbrs of the Stuart race, wore their beards, as did all hi». fuccefibrs, to the reign of Charles II. James V. king of Scotland, in 1513, was bnt 18 months old when his father loft his life. When of age, he affifted Francis I. king of France againft the em¬ peror Charles le Quint; for which fervice Francis gave him his eldeft daughter in marriage, in 1535, This princefs died in two years ; and James married Mary of Lorraine, daughter of Claud duke of Guife, and wi¬ dow of Louis d’Orleans, by whom he had only one child, the unfortunate Mary queen of Scots, born on- was murdered by barbarous affaffins in the prime of ly eight days before his death, which happened De 3. cembev JAM [ 59 ] JAM James, eember 13. 1542, in the 35th year of his age. This 1 was the firft prince of his family who died a natural death, fince its elevation to the throne. He died, m however, of a broken heart, occafioned by differences with his barons. He was formed by nature to be the ornament of a throne and a blefling to his people ; but his excellent endowments were rendered in a great meafure ineffeftual by an improper education. Like moft of his predeceffors, he was born with a vigorous, graceful perfon, which, in the early part of his reign, was improved by all the manly exercifes then in ufe. This prince was the author of a humourous compofx- tion in poetry, whiclvgoes by the name of the Gaber- lun’z.te Man* James VI. king of Scotland in 1567, and of Eng¬ land in 1603, was fonof Mary queen of Scots; whomhe fucceeded in Scotland, as he did Elizabeth in England. Strongly attached to the Proteftant religion, he figna- lized himfelf in its fupport; which gave rife to the horrid confpiracy of the Papifts to dellroy him and all the Englifh nobility by the Gunpowder Plot, dif covered November 5. J605. The following year, a political left of loyalty was required, which fecured ■ the king’s perfon, by clearing the kingdom of thofe difaffeded Roman-Catholic fubjeds who would not fubmit to it. The chief glory of this king’s reign con- hfted in the eftablifhment of new colonies, and the introdudion of fome manufadures. The nation enjoy¬ ed peace, and commerce flourifhed during his reign. Yet his adminiftration was defpifed both at home and abroad : for, being the head of the Proteflant caufe in Europe, he did not fupport it in that great crifrs, the war of Bohemia ; abandoning his fon-in-law the eledor Palatine ; negotiating when he fhould have fought, deceived at the fame time by the courts of Vienna and Madrid 5 continually fending illuftrious ambaifadors to foreign powers, but never making a Angle ally. He valued himfelf much upon his polemical writings ; and fo fond was he of theological difputations, that to keep them alive, he founded, for this exprefs purpofe, Chelfea-college ; which was converted to a much bet¬ ter ufe by Charles II. His Bafilicon Doron, Com¬ mentary on the Revelation, writings againft Bellar- mine, and his Damonologia, or dodrine of witchcraft, are fufficiently known. There is a colledion of his writings and fpeeches in one folio volume. Several other pieces of his are extant; fome of them in the Caballa, others in manufcnpt in the Britifh Mufeum, and others in Howard’s colledion. He died in 1625, in the 59th year of his age, and 23d of his reign. James II. king of England, Scotland, &c. 1685, grandfon of James I. fuccteded his brother Char. II. It is remarkable, that this prince wanted neither cou¬ rage nor political abilities whilil he was duke of York ; on the contrary, he was eminent for both : but when he afcended the throne, he was no longer the fame man. A bigot from his infancy to the Romilh reli¬ gion and to its hierarchy, he facrificed every thing to eflablifh them, in dired contradidion to the experi¬ ence he had acquired, during the long reign of his brother, of the genius and charader of the people he was to govern. Guided by the Jefuit Peters his con- feffor, and the infamous chancellor Jeffries, he violated every law enaded for the fecurity of the Proteftant re¬ ligion ; and then, unable to face the refentment of his injured fubjeds, he fled like a coward, inftead of dif- Jatfies. arming their rage by a difmiffion of his Popilh mini- -v— fters and priefts. He rather chofe to live and die a bi¬ got, or, as he believed, a faint, than to fupport the dignity of his anceftors, or perifh beneath the ruins of his throne. The confequence was the revolution in 1689. James IL died in France in 1710, aged 68. He wrote Memoirs of his own life and campaigns to the reftoration; the original of which is preferved in the Scotch college at Paris. This piece is printed at the end of Ramfay’s life of Marihal Turenne. 2. Me¬ moirs of the Englilh affairs, chiefly naval, from the year 1660 to 1673. 3- The ro>'al fufferer, king James II. confiding of meditations, foliloquies, vows, &c. faid to be compofed by his majefty at St Ger¬ mains. 4. Three letters ; which were publilhcd by William Fuller, gent, in 1702, with other papers re¬ lating to the court of St Germains, and are faid in the title-page to be printed by command. James (Thomas), a learned Englifli critic and di¬ vine, born about the year 1571. He recommended himfelf to the office of keeper of the public library at Oxford, by the arduous undertaking of publiihing a catalogue of the MSS in each college library at both univerfities. He was ele&ed to this office in 1602, and held it 18 years, when he refigned it to profecute his (Indies with more freedom. In the convocation held with the parliament at Oxford in 1625, of which he was a member, he moved to have proper commif- fioners appointed to collate the MSS of the fathers in all the libraries in England, with the Popiflt editions, in order to deteft the forgeries in the latter ; but this propofal not meeting with the defired encouragement, he engaged in. the laborious talk himfelf, which he continued until his death in 1629. He left behind him a great number of learned works. James (Richard), nephew of the former, entered into orders in 1615 : but, being a man of humour, of three fermons preached before the univcrfity, one con¬ cerning the obfervation of Lent was without a text, according to the moft ancient manner; another againft the text; and the third befide it. About the year 1619, he travelled through Wales, Scotland, Shet¬ land, into Greenland and Ruffia, of which he wrote obfervations. He affifted Selden in compofing his Marmora Arunddiana; and was very ferviceable to Sir Robert Cotton, and his fon Sir Thomas, in dif- pofing and fettling their noble library. He died in 1638 ; and has an extraordinary chara&er given him by Wood for learning and abilities. James (Dr Robert), an Engliftr phyfician of great eminence, and particularly diftinguifhed by the prepa¬ ration of a moft excellent fever-powder, was born at Kinverfton in Staffordffiire, A. D. 1703 : his father a major in the army, his mother a filter of Sir Robert Clarke. He was of St Jbhn’s-college in Oxford, where he took the degree of A. B. and afterwards pradtifed phyfic at Sheffield, Lichfield, and Birming¬ ham fucceffively. Then he removed to London, and became a licentiate in the college of phyficians; but in what years we cannot fay. At London he applied himlelf to writing as well as praftifing phyfic ; and in 1743, publifhed a Medicinal Didtionary, 3 vols folio. Soon after he publiflied an Engliftr tranflation, with a Supplement by himfdf, of Ramazzini de morbis artifi- 1 JAM f 60 ] JAM James'* cum; to wHich he alfo prefixed a piece of Frederic Powder. ^ Hoffman upon Endemial Dillempers, 8vo. In 1746, * The Praftice of Phyfic, 2 vols 8vo; in 1760, On Ca¬ nine Madnefs, 8vo; in 1764, A Difpenfatory, 8vo. June 2J. 1755* when the king was at Cambridge, James was admitted by mandamus to the do&orfhip of phyfic. In 1778, were publifhed, A Differtation upon Fevers, and A Vindication of the Fever-Powder, 8vo; with A fhort Treatife on the Diforders of Chil¬ dren, and a very good print of Dr James. This was the 8th edition of the Differtation, of which the firfl was printed in 17515 and the purpofe of it was, to fet forth the fuccefs of this powder, as well as to de- fcribe more particularly the manner of adminiftering it. The Vindication was pofthuraous and unfiniihed: for he died March 23. 1776, while he was employed upon it.— Dr James was married, and left feveral fons and daughters. James's Powder, a medicine prepared by the late Dr Robert James, of which the bafishas been long known to chemifts, though the particular receipt for making it lay concealed in Chancery till made public by Dr f Vol. I. Monro in his Medical and Pharmaceutical Chemijlry {-. J>. 366* The following (Dr Monro informs us) is a copy of the receipt, extracted from the Records of Chancery ; the inventor, when he took out a patent for felling his pow¬ der, having fworn, in the mod folemn manner, that it was the true and genuine receipt for preparing it: ‘ Take antimony, calcine it with a continued pro- trafted heat, in a flat, unglazed,earthen veffel, add¬ ing to it from time to time a fufficient quantity of any animal oil and fait, well dephlegmated ; then boil it in melted nitre for a coniiderable time, and feparate the powder from the nitre, by diffolving it in water.’ This extraft Dr Monro accompanies with the fol¬ lowing obfervations. “ When the Doftor firlt admi- niftered his powder, he ufed to join one grain of the following mercurial preparation to thirty grains of his antimonial powder ; but in the latter part of his life Le often declared that he had long laid aiide the addi¬ tion of the mercurial. His mercurial, which he called a pill, appears by the records of chancery to have been made in the following manner: ‘ Purify quickiilver, by diftilling it nine times from an amalgam, made with martial regains of antimony, and a proportional quan¬ tity of fal ammoniac ; diffolve this purified quicklilver ta fpirit of nitre, evaporate to drynefs, calcine the powder till it becomes of a gold colour ; burn fpirits of wine upon it, and keep it for ufe.’ Dr James, at the end of the receipt given into chancery, fays, ‘ The dofe of thefe medicines is uncertain ; but in general thirty grains of the antimonial and one grain of the mercurial is a moderate dofe. Signed and fworn to, by Robert James.’ “ I have frequently direffed this powder to be gi¬ ven, and have often feen Dr James himfelf as well as other praftitioners adrainifter it, in fevers and in other complaints. Like other aftive preparations of anti¬ mony, it fometimes operates with great violence, even when given in fmall dofes ; at other times a large dofe produces very little vifible effe&s. I have feen three grains operate briikly, both upwards and downwards ; and I was once called to a patient to whom Dr James had himfelf given five grains of it, and it purged and vomited theTady for twenty-four hours, and in that James’s 1 time gave her between twenty and thirty flools ; at o- ^owj'ler ^ ther times I have feen a. fcruple produce little or no Tameibne. L vifible effect. j “ So far as I have obferved,. I think that the dofe of this powder to an adult, is from five to twenty grains ; and that, when it is adminiflered, one ought to begin by giving fmall dofes. “ Where patients are ftrong, and a free evacuation is wanted, this is a ufeful remedy tand it may be given in fmall repeated dofes as an alterative itv many cafes j but where patients are weakly and in, low fevers, it of¬ ten a&s with too great violence ; and I have myfelf feen inilances, and have heard of others from other pra&itioners, where patients have been hurried to their graves by the ufe of this powder in a very fhort. time. “ It has been called Dr James’s Fever-Powder ; and many have believed it to be a certain remedy for fe¬ vers, and that Dr James had cured molt of the patients whom he attended, and who recovered, by the ufe of this powder. But the bark, and not the antimonial- powder, was the remedy which Dr James almoft al¬ ways trufted to for the cure of fevers : he gave his powders only to clear che ftomach and bowels ; and after he had effected that, he poured in the bark as freely as the patient could fwallow it. The Dodtor believed all fevers to be more or lefs of the intermit¬ ting kind; and that if there was a poffibility of curing, a fever, the bark was the remedy to effectuate the cure ; for if the fever did not yield to that, he was fure that it wouli yield to no other remedy what¬ ever, as he has more than once declared to me when I have attended patients in fevers along with him.” James Town, a borough and fair-town of Ireland, in the county of Leitrim, and province of Connaught ; fituated 5 miles north-weft of Carrick, on Shannon, and 73 north-weft of Dublin, in north lat. 53. 44. weft long. 8. 15. It has a barrack for a company of foot,, and returns two members to parliament; patronage in the family of King.—It has three fairs. St James Day, a feftival of the Chriftian church,, obferved on the 25th of July, in honour of St James the greater, fon of Zebedee. Epijlle of St James, a canonical book of the New Teftament, being the firft of the catholic or general epiflles ; which are fo called, as not being written to one but to feveral Chriftian churches. This general epiftle is addreffed partly to the belie¬ ving and partly to the infidel Jews ; and is defigned to- corredl the errors, foften the ungoverned zeal, and re¬ form the indecent behaviour of the latter ; and to com¬ fort the former under the great hardihips they then did, or fhortly were to fuffer, for the fake of Chrif- tianity. JAMESONE (George), an excellent painter, juft- ly termed the Vandyck of Scotland, was the Con of An¬ drew Jamefone, an architect; and was born at Aber¬ deen, in 1586. He ftudied under Rubens, at Ant¬ werp ; and, after his return, applied with indefati¬ gable induftry to portraits in oil, though he fometimes , pra&ifed in miniature, and alfo in hiftory and land- fcapes. His largeft portraits were fo me what lefs than life. His earlieft works are chiefly on board, after¬ wards oa a fine linca cloth fxaoothly primed with a prow* JAN JaiByn, proper tone to help the harmony of his fhadows. His , excellence is faid to confiil in delicacy and foftnefs, with a clear and beautiful colouring; his (hades not charged, but helped by varnifh, with little appearance pf the pencil. When king Charles I. vifited Scotland in 1633, the magiltrates of Edinburgh, knowing his majeily’s tafte, employed this artilt to make drawings of the Scottifh monarchs; with which the king was fo pleafed, that, inquiring for the painter, he fat to him, and rewarded him with a diamond-ring from his own finger. It is obfervable, that Jamefone always drew himfelf with his hat on, either in imitation of hi$ mafter Rubens, or on having been indulged in that Liberty by the king when he fat to him. Many of Jamefone’s works are in both the colleges of Aber¬ deen ; and the Sybils there he is faid to have drawn from living beauties in that city. His bell works are from the year 1630 to bis death, which happened at Edinburgh in 1644. JAMYN (Amadis), a celebrated French poet in the 16th century. He is eileemed the rival of Ron- fard, who was his cotempurary and friend. He was k cretary and chamber-reader in ordinary to Char. IX. and died about if&y. He wrote, 1. Poetical works, 7 vols. 2. Philofophical difeoutfes to Paficharis and Rodantbe, with feven academical dilbourfes. 3. A tranflation of the Iliad of Homer, begun by Hugh Sabel, and finiflied by Jamyn ; with a tranflation into French verfe of the three firll books of the Odyffey. JANE o/Tla.mders, a remarkable lady, who feems to have pofl'efled in her own perfon all the excellent qua¬ lities of both fexes,. was the wife of John de Mountfort, a competitor for the dukedom of Brittany upon the death of John III. This duke, dying without iffue, left his dominions to his niece Jane, married to Charles de Blois nephew to the king of France; but John de Mountfort, brother to the late duke though ly a fecond marriage, claimed the duchy, and was received as fuc- pdTor by the people of Nantes. The greateft part of the nobility fwore fealty to Charles de Blois, thinking him bed fupported. This difpute occafioned a civil war ; in the courfe of which John was taken prifoner, and fentto Paris. This misfortune would have entire¬ ly ruined his party, had not his intereft been fupport¬ ed by the extraordinary abilities of his wife, Jane of Flanders. Bold, daring, and intrepid, fhe fought like a warrior in the field; fhrewd, fenfible, and fagacious, fhe fpoke like a politician in the council ; and endow¬ ed with the moll amiable manners, and winning addrefs, fhe was able to move the minds of her fubjefts by the force of her eloquence, and mould them exactly accord¬ ing to her pleafure. She happened to be at Rennca when fhe received the news of her hufband’s captivity; but that difafler, inftead of depreffing her fpirits, ferved only to roufe her native courage and fortitude. She forthwith affembled the citizens ; and, holding in her arms her infant fon, recommended him to their care andprote&ion in the moft pathetic terms, as the male heir of their ancient dukes, who had always governed them with lenity and indulgence, and to whom they had ever profefled the moll zealous attachment. She declared herfelf willing to run all hazards with them in fo juft a caufe; pointed out the refources that flill re¬ mained in the alliance of England ; earneftly befeech- ing them to make one vigorous effort agalnft an ufur- JAN per, who being forced upon them by the intrigues of J-m* France, would, as a mark of his gratitude, facrifice the .V liberties of Brittany to his prote&or. The people, Jlnu^rie*' moved by the affeftiug appearance, and animated by the noble coudu6l of tfic princefs, vowed to live and die with her in defending the rights of her family ; and their example was followed by almoft all the Bretons. The conntefs went from place to place, encouraging the garrifons of the feveral fortreffes, and providing them with every thing neceffary for their fobliilence ; after which (lie (hut herfelf up with her fon in Hennc- bon, where (he refolved to wait for the fuccours which the king of England (Edward III.) had promiied to fend to her afliilance. Charles de Blois, accompanied by the Dukes pf Burgundy and Bourbon, and many other nrblemen, took the field with a numerous army, and having reduced Rennes, laid fiege to Hennebon, which was defended by the couutefs in perfon. This heroine repulfed the affailants in all their attacks with the moll undaunted courage, and obferving one day that their whole army had left the camp to join in a general dorm, (he ruftied forth at a poilern-gate, with three hundred horfe, fet fire to their tents and baggage, killed their futlers and fervants, and raifed fuch a ter¬ ror and confternation through all their quarters, that the enemy gave over their affault, and getting betwixt her and the walls, endeavoured to cut off her retreat to the city. Thus intercepted, (he put the fpurs to her horfe, and, without halting, galloped diredly to Breft, which lay at thediftance of two-and twenty miles from' the feeae of a&ion. There being fupplied with a bo¬ dy of five hundred horfe, (lie immediately returned, and fighting her way through one part of the French camp, was received into Hennebon, amidft the accla¬ mations of the people. Soon after this the Englifli fuccours appeared, and obliged the enemy to raife the fiege. JANEIRO, a province of Brafil in South Ameri¬ ca, feated between the tropic of Capricorn and 220 of S’. Lat. It is bounded on the north by the province of Spirito San&o, on the call and fouth by the At¬ lantic Ocean, and on the weft by the mountains which feparate it from Guiara, in Spanifh America. This is the moft valuable province which the Portuguefe are mailers of; for they import from thence yearly great quantities of gold and precious ftones, which they find in the mountains, to a prodigious value. JANICULUM, or Janicularis, a hill of ancient Rome, added by Ancus Martius; the burial-place of Noma, and of Statius Csecilius the poet: to the eaft and fouth, having the Tiber ; to the weft, the fields; to the north, a part of the Vatican. So called, either from an ancient city, (Virgil) ; or becaufe it was a janua, or gate, from which to iffue out and make incurliona on the Tufcans, (Verrius Flaccus.) Now called Mans Aureut corruptly Mont onus, from its fparkling fands. From this hill, on account of its height, is the moft extenfive profpeil of Rome : but it is lefs inhabited, becaufe of its grofs air ; neither is it reckoned among the feven hills. Hither the people retired, and were hence afterwards recalled by Hortenfias the di&a- tor, (Pliny.) JANIZARIES, an order of infantry in the Turkifla a armies; reputed the grand feignior’s foot guards. Vo thus derives the word ft am genizers, which in the Turkifc t 6l ] JAN f 64 1 JAN Turk ifh language; figriifies rwvi homines or mi Ikes, third of janizaries ; who are a kind of correftors and Janfcn, D’ Herbelot tells us, that jeuitcberi fignifies a new bank, revifors of the pope’s bulls. Janfenitls. or troop; and that the name was firft given by Amu- JANSEN (Cornelius), bilhop of Ypres, one of the V rath I. called the Conqueror, who chobfing out one fifth moft learned divines of the 17th century, and princi- part of the Chriftian prifoners whom he had taken pal of the fe& called from his name JanfeniJls. He from the Greeks, and inftru&ing them in the difcipline was born in Holland of Catholic parents, and (ludied of war and the do&rinesof their religion, fent them to at Louvain. Being fent to tranfadl fome bufinefs of Hagi Bektafche (a perfonwhofe ptetended piety render- confequence relating to the univerfity, into Spain,; the ed him extremely revered among the Turks), to the Catholic king, viewing with a jealous eye the intriguing end that he might confer his bleffing on them, and at policy of France, engaged him to write a book to the fame time give them fome mark to diftinguifh them expofe the French to the pope as no good Catholics, from the reft of the troops.—Bektafche, after blefiing fince they made no fcruple of forming alliances with them in his manner. Cut off one of the fleeves of the Proteftant Hates. Janfen performed this talk in his fur-gown which he had on, and put it on the head of Mars Gallicus ; and was rewarded with a mitre, being the leader of this new rtiilitia ; from which time, viz. promoted to the fee of Ypres in 1635. He had, a* ’the year of Chrift 1361, they have Hill retained the mong other writings, before this, maintained a con- name jenitchert, and the fur-cap. tnverfy againft the Proteftants upon the points of As, in the Turkifh army, the European troops are grace and predeftination 5 but his Augujlinus was the diftinguifhed from thofe of Afia; the janizaries are al- principal labour of his life, on which he fpent above 20 fo diftinguifhed into jdnizarks of Conjiantmople, and of years. See the next article. Damafcus. Their pay is from two afpers to twelve JANSENISTS, in church-hiftory, a feft of the per diem ; for when they have a child, or do any fig- Roman Catholics in France, who followed the opinions nal piece of fervice, their pay is augmented.—Their of Janfenius, bifhop of Ypres, and dodtor of divinity drefs confifts of a dolyman, or long gown, with fhort of the univerfitieS of Louvain and Douay, in rdation fleeves, which is given them annually by the grand to grace and predeftination. feignior on the firft day of Ramazan. They wear no In the year 1640, the two oniverfities juft mentlon- turbeau ; but, in lieu of that, a kind of cap, which ed, and particularly father Molina and father Leonard they call %arcola, and a long hood ©f the fame fluff Celfus, thought fit to condemn the opinions of the Je- hanging on their (boulders. On folemn days they are fuits on grace and free-will. This having fet the con- adorned with feathers, which are ftuck in a little cafe troverfy on foot, Janfenius oppofed to the dodtrine of on the fore-part of the bonnet.—Their arms,in Europe, the Jefuits the fentiments of St Auguftine; and wrote in time of war, are a fabre, a carabine or mu(ket, a treatife on grace, which he intitled Augujlinus. and a cartouch-box hanging on the left fide. At Con- This treatife was attacked by the Jefuits, who accufed ftantinople, in time of peace, they wear only a long Janfenius of maintaining dangerous and heretical opU ftaff in their hand. In Afia, where powder and fire- nions ; and afterwards, in 1642, obtained of pope Un¬ arms are more uncommon, they wear a bow and ar- ban VIII. a formal condemnation of the treatife wrote rows, with a poingard, which they call haniare.— by Janfenius: when the partifans of Janfenius gave Though the janizaries are not prohibited marriage, out that this bull was fpurious, and compofed by a per-. yet they rarely marry, nor then but with the confent fon entirely devoted to the Jefuits. After the death of their officers ; as imagining a married man to make of Urban VIII, the affair of Janfenifm began to be a worfe foldier than a bachelor.—It was Ofman, or more warmly controverted, and gave birth to an infi- 'Ottoman, or, as others will have it, Amurath, who nite number of polemical writings concerning graced firft inftituted the order of janizaries. They were at And what occafioned fome mirth, was the titles which firft called jaja, that is, footmen, to diftingiiiftt them each party gave to their writings: one writer publilh- from the other Turks, the troops whereof confided ed The torch of St Augujline, another found Snujferi moftly of cavalry. The number of janizaries is gene- for St Augufline’s torch, and father Veron formed A gag rally above 40,000; divided into 162 companies or for the JanfeniJls, &c. In the year 1650, 68 bifhops chambers called odas, in which they live together at of France fubfcribed a letter to pope Innocent X. to Conftantinople as in a convent. They are of a fupe- obtain an inquiry into and condemnation of the five rior rank to all other foldiers, and are alfo more arro- following propofitions, extra6ted from Janfenius’s Au- gant and factious, and it is by them that the public guftinus; 1. Some of God’s commandments are im- tranquillity is moftly difturbed. The government may poffible to be obferved by the righteous, even though therefore be faid to be in the hands of the janizaries, they endeavour with all their power to accomplilh They have, however, fome good qualities : they are them. 2. In the ftate of corrupted nature, we are in- employed to efcort travellers, and efpecially ambaf- capable of refifting inward grace 3. Merit and de- fadors and perfons of high rank, on the road ; in which merit, in a ftate of corrupted nature, does not depend cafe, they behave with the utmoft zeal and fidelity. on a liberty which excludes neceffity, but on a liberty Janizaries, at Rome, are officers or penfioners of which excludes eonftraint. 4. The Semipelagians ad-' the pope, called alfo participantes, on account of certain mitted the neceffity of an inward preventing grace for rites or duties which they enjoy in the annates, bulls, the performance of each particular ad, even for the or expeditions, and the Roman chancery.—Moft beginning of faith; but they were heretics in main* authors are miftaken in the nature of their office : taining that this grace was of fuch a nature, that the 'the truth is, they are officers of the third bench or will of man was able either to refift or obey it. It is college of the Roman chancery. The firft bench Semipelagianifm to fay, that Jefus Chrift died, or (hed confifts of writers, the fecond of abbrcviators, and the his blood, for all mankind in general. In J A N [ 63 ] J A N JanfFens. In the year 1652, the pope appointed a congrega- Janflens compofcd hiftorical fubje&s, both in a fniall Jaflffens, 1 1 tion for examining into the difpute in relation to grace, and a large fize ; but he found the demand for his Januar*us In this congregation Janfenius was condemned ; and fmall pidlures fo confiderable, that he was induced to v ' the bull of condemnation, publifhed in May 1653, fill- paint mofi frequently in that fize. During 11 years ed all the pulpits in Paris with violent outcries and he continued at Rome, which barely fufficed for his alarms againft the herefy of the Janfenifts. In the year 1656, pope Alexander VII. iffued out another bull, in which he condemned the five propofitions of Janfe- finifhing thofe pictures for which he was engaged ; could he have been even then at his liberty, had he not limited himfelf to a number, and determined not to v thus. However, the Janfenifts affirm, that thefe pro- dertakemore.—Returning to Bnffftls,.his performances pofitions are not to be found in this book ; but that were as much admired there as they had before been fome of his enemies having caufed them to be printed in Italy ; but having married, and gradually become on a ffieet, inferted them in the book, and thereby de- the father of 11 children, he was compelled to change ceived the pope. At laft Clement XL put an end to the his manner of painting in fmall, and to undertake on- difpute by his conftitution of July 17. 1.705; in which, ly thofe of the large kind, as being more lucrative, after having recited the conftitutions of his predecef- more expeditious, and alfo more agreeable to his ge- r.._„ ; j—1—— «’T’u,.. nius and inclination. He adorned moft of the churches- and palaces of his own country with his compofitions. —The invention of this artift was fruitful; he defign- fors in relation to this affair, he declares, “ That order to pay a proper obedience to the papal conftitu¬ tions concerning the prefent queftion, it is neceffary to receive them with a refpe&ful filence.” The clergy of ed corre&ly, his colouring is natural and pleafing, hiV Paris, the fame year, approved and accepted this bull, and none dared to oppofe it. This is the famous bull Unigenitus, fo called from pencil free, and the airs of his heads have beauty and elegance. As to the difference between his large and fmall paintings, it is obferved,. that in correftnefs and. its beginning with the words Unigenitus Dei Filmst tafte they had an equal degree of merit; but the c &c. which has occafioned fo much confufion in louring of the former appears more raw and cold than France. the colouring of the latter and it is agreed, that for JANSSENS(Abraham),hiftory-painter, was born at fmall hiftorical pidfures, he was preferable to all the Antwerp in 1569. He was cotemporary with Rubens, painters of his time, and alfo his competitor, and in many of the fineft parts of the art was accounted not inferior to that celebrated mailer. It is reported, that having wafted his time Janssen (Cornelius), called Johnfon, an eminent painter of portraits, was born at Amfterdam (though in the Chronological tables, and in Sandrart, it is inl¬ and his fubftance by a life of diffipacion and pleafure, properly afferted, that he was born in London), and- and falling into neceffitous circumftances, which he he refided in England for feveral years ; where he was imputed more to ill fortune than to his own negledt of engaged in the fervice of king James I. and painted his bufinefs, he grew envious at the grandeur fh which Rubens appeared, and impatient at his merit and fuc- cefs; and with peevifh infolence challenged him to feveral excellent portraits of that monarch, as alfo of his children and of the principal nobility of his court. He had not the freedom of hand, nor the grace of paint a pidture with him only for fame, which he was Vandyck ; but in other refpedls he was accounted his willing to fubmit to impartial judges. But Rubens equal, and in the finifhing his pictures fuperior. His rejedted the propofal, anfwering with modefty, that he paintings areeafily diftinguifhed by their fmooth, clear. freely fubmitted to him, and the world would certain¬ ly do juftice to them both. Sandrart, who had feen feveral of his works, allures and delicate tints, and by that charadler of truth and nature with which they are ftrongly marked. He ge¬ nerally painted on board ; and, for the moft part, his us, that he not only gave a fine roundnefs and relief draperies are black ; probably becaufe the opposition to his figures, but alfo fuch a warmth and clearnefs to of that tint made his flefh colours appear more beauti- the carnations, that they had all the look of real flefh; fully bright, efpecially in his female figures. It is faid and his colouring was as durable as it was beautiful, that he ufed a quantity of ultra marine in the black retaining its original luftre for a number of years. His colours, as well as in his carnations; which may be moft capital performance is faid to be a refurreftion of one great caufe of their preferving. their original luftre Lazarus, which is in the cabinet of the ele&or Pala- even, to this day. Frequently he painted in a fmall fize tine, and is an obje£ of admiration to all who behold in oil, and often copied his own works in that man- k. ner. His fame began to be fomewhat obfcured, on the Janssens (Vidlor Honorius), hiftory-painter, was arrival of Vandyck in England ; and the civil war born at Bruflels in 1664, an<^ was a difciple of one breaking out fome time after, induced him to return- Volders, under whofe dire&ion he continued for feven to his own country, where his paintings were in the years; in which time he gave many proofs of a geni- higheft efteem. He died in 1685. us far fuperior to thofe who were inftrufted in the fame fchwol. He afterwards went to Rome, where he attended particularly to the works of Raphael; he St JANUAR1US, the patron-faint of Naples, where his head is occafionally carried in proceffion, in order to flay the eruption of Vefuvius. The lique- defigned after the antiques, and fketched the beauti- faction of his blood is a famous miracle at Naples, ful fcenes around that city; and in a fhort time his The faint fuffered martyrdom about the end of the paintings rofe in efteem, and the principal nobility of third century. When he was beheaded, a pious lady Rome were defirous to employ him. He affociated . of Naples caught about an ounce of his blood, which with Tempefta, the celebrated landfcape painter, for has been carefully preferved in a bottle, ever fince, feveral years, and painted the figures in the works of without having loft a Angle grain of its weight. This ■ that great mafter as long as they refided together, of itfelf, were it equally demonftrable, might be coa- jhfcrfC:- JAN t 64 ] JAN 'J^niiarhis fidertd as a greater miracle than the circumftance on January. ^ wycj! tjie Neapolitans lay the whole ftrefs, viz. that v the blood which has congealed, and acquired a folid form by age, is no fooner brought near the head of the faint, than, as a mark of veneration, it immediate¬ ly liquefies. This experiment is made three different times every year, and is confidered by the Neapoli¬ tans as a miracle of the firft magnitude. The fubftance in the bottle, which fs exhibited for the blood of the faint, has been fuppofed to be fome- thing naturally folid, but -which melts with a fmall degree of heat. When it is firft brought out of the cold chapel, it is in its natural folid ftate ; but when brought before the faint by the pried, and rubbed be¬ tween his warm hands, and breathed upon for fome time, it melts; and this is the whole my fiery. But Dr Moore *, though he confefles himfelf unable to ex- •P-179 U’ plain on what principle the liquefaction depends, is convinced that it muft be fofnething different from this : “ For he had it (he informs us) from the moft fatisfaftory authority, from thofe who had opportuni¬ ties of knowing, and who believe no more in the mi¬ racle than the ftauncheft Proteftant, that this con¬ gealed mafs has fometimes been found in a liquid ftate in cold weather, before it was touched by the prieft, or brought near the head of the faint; and that, on other occafions, it has remained folid when brought before him, notwrthftawding all the efforts of the prieft to melt it. When this happens, the fuperftitious, which, at a very moderate calculation, comprehends '-99 in too of the inhabitants of this city, are thrown into the utmoft cortfternation, and are fometimes wrought up by their fears into a ftate of blind which is highly dangerous both to their civil and ecclefiaftical governors. It is true, that this happens but feldom : for, in general, the fubftance in the phial, whatever it may be, is in a-folid form in the chapel, and becomes li¬ quid when brought before the faint: but as this is not -always the cafe, it affords reafonto believe, that what¬ ever may have been the cafe when this miracle or trick, call it which you pleafe, was firft exhibited, the principle on which it depends has fomehow or other been loft, and is not now underftood fully even by the priefts themfelves; or elfe they are not now fo expert as formerly, in preparing the fubftance which repre- ■fents the faint’s blood, fo as to make it remain fohd when it ought, and liquefy the inftant it is required.” For the principle *on which this pretended miracle is performed, or the compofition by which it is or may -be performed, fee Chemistry, n°Soo. The head and blood of the faint are kept in a kind cf prefs, withholding doors of filver, in the chapel of 'St Januarius belonging to the cathedral church. The real head is piobably not fo frefit, and well preferved, as the blood. On that account, it is not expofed to the eyes of the public ; but is ihclofed in a large filver bull, gilt and enriched with jewels of high value. This being what-appears to the people, their idea of the faint’s features and complexion are taken entirely from the bull.—The blood is kept in a fmall repofitory by itfelf. JANUARY, the name of the firft month of the year, according to the computation now ufed in the weft. The word is derived from the Latin Januarrus, .a name given it by the Romans from Janus, one of 162. their divinities, to whom they attributed! two faces, January, becaufe on the one fide the firft day of January looked towards the new year, and on the other towards the v~mi old one. The word Jamtarius may alfo be derived from janua t( gate ;” in regard this month being the firft, is, as it were, the gate of the year. January and February were introduced into the year ftjy Numa Pompilius; Romulus’s year beginning in the month of March.—The kalends, or firft day of this month, was under the prote&ion of Juno, and in a peculiar manner confecrated to Janus by an offering of a cake made of new meal and new fait, with new frankincenfe and new wine. On the firft day of Ja¬ nuary a beginning was made of every intended work, the confuls cleft took poffeffion of their office, who, with the flamens, offered facrifices and prayers for the profperity of the empire. On this day all animofities were fufpended, and friends gave and received new- year’s gifts, called Streme. On this day too the Ro¬ mans above all things took care to be merry and divert themfelves, and oftentimes fuch a feene of drnnkennefs was exhibited, that they might with propriety enough have diftinguifhed it with the name at Allfook-dayS The Chriftians heretofore fafted on the firft day of January, by way of oppofition to the fupetftitions and debaucheries of the heathens. JANUS, in heathen worfhip, the firft king of Italy, who, it is faid, received Saturn into his dominions, after his being driven from Arcadia by Jupiter. He tem¬ pered the manners of his fubjefts, and taught them civi¬ lity ; and from him they learned to improve the vine, to fow corn, and to make bread. After his death, he was adored as a god. This deity was thought to prefide over all new un¬ dertakings. Hence, in all facrifices, the firft libations of wine and wheat were offered to Janus, all prayers prefaced with a ffiort addrefs to him ; and the firft month of the year was dedicated to and named from him. See Janu ary. Janus was reprefented with two faces, either to de¬ note his prudence, or that he views at once the pa It and approaching years; he had a feeptre in his right hand, and a key in his left, to fignify his extenlive an thority, and his invention of locks. Though this is properly a Roman deity, the abbe la Pluche reprefents it as derived from the Egyptians, who made known the riling of the dog-ftar, which o» pened their folar year, with an image with a key in its hand, and two feces, one old and the other young, to tipify the old and new year. Temple of Janus, in ancient hiftory, a fquare build ing at Rome (as fome fay) of entire brafs, erefted by Romulus, and fo large as to contain a ftatue of Janus five feet high, with brazen gates on each fide, which were always kept open in time of war, and /hut in time of peace. But the Romans were fo much engaged in war, that this temple was (hut only twice from the foundation of Rome till the reign of Auguilus, and fix times afterwards. It was firlt fhnt during the long reign of Numa, who inflituted this ceremony. 2. In the year of the city 519, after the end of the firft Punic war. 3. By Augullus after the battle of Aftium, in the year of Rome 725. ^ On Auguftus’s return from the war which he had againft the Cantabrians in Spain, ^ in the year of Rome 729. 5. Under the fame emperor, in 2 744? TAP r 65 3 JAP Janus, 744, about five years before the birth of Chrift, when Japan, there was a general peace throughout the whole Ro- man empire, which lafted 12 years. 6. Under Nero, 811. 7. Under Vefpafian, 824. 8. Under Conftan- tius, when, upon Magnentius’s death, he was left foie poffeffor of the empire, 1105. Some difpute the authority on which it is faid to have been fhut by Con- ftantius, and fay that the laft time of its being Ihut was under Gordian, about the year of Rome 994. Virgil gives us a noble defcription of this cuftom, JEn. lib. iii. ver. 607, &c. The origin of this cultom is not certainly known. Janus was alfo the name of a ftreet in Rome,ina- bited for the moft part by bankers and ufurers. It was fo called from two flatues of Janus which were ere&ed there, one at the top, the other at the bottom, of the flreet. The top of the ftreet was thetefore called Ja¬ nus Summus, the bottom Janus Imus, and the middle Janus Medius. Hence Horace, lib. i. Epift. 1, H hours ; and in this divifion they are direfted the whole year by the rifing and fetting of the fun. They reckon fix o’clock at the rifing, and fix likewife at the fetting of the fun. Mid-day and mid-night are always at nine. Time is not meafured by clocks or hour- glaffes, but with burning matches, which are twided together like ropes, and divided by knots. When the match is burnt to a knot, which indicates a certain portion of time elapfed, notice is given during the day, by driking the bells of the temples; and in the night, by the watchmen driking two boards againft one another. A child is always reckoned a year old at the end of the year of his birth, whether this hap¬ pen at the beginning or the clofe. A few days after the beginning of the year, is performed the horrid ceremony of trampling on images reprefenting the crofs and the Virgin Mary with her child. The images are of melted copper, and are faid to be fcarce a foot in height. This ceremony is intended to im- prefs every individual with hatred of the Chridian doftrine, and the Portuguefe, who attempted to in¬ troduce it there ; and alfo to difeover whether there is any remnant of it left among the Japanefe. It is performed in the places where the Chrittians chiefly refided. In Nagafaki it lafts four days ; then the images are conveyed to the circumjacent places, and afterwards are laid afide againft the next year. Every perfon, except the Japanefe governor and his atten¬ dants, even the fmallell child, muft; be prefent; but it is not true, as fome have pretended, that the Dutch are alfo obliged to trample on the image. Overfeers are appointed in every place, which aflemble the peo¬ ple in companies in certain houfes, call over the name of every one in his turn, and take care that every thing goes on properly. The children, not yet able to walk, have their feet placed upon it; older per¬ fons pafs over it from one fide of the room to the other. The Japanefe are much addifted to poetry, mufic, and painting ; the firft is faid to be grand as to the ftyle and imagery, loftinefs, and cadence; but, like that of the Chinefe, is not eafily underftood or relifh- ed by the Europeans. The fame may be faid of their mufic, both vocal and inftrumental 3 the belt of which, of either kind, would hardly be tolerable to a nice European ear. They pretend, like the Chinefe, to have been the inventors of printing from time immemorial, and their method is the fame with theirs, on wooden blocks ; but they excel them in the neatnefs of cutting them, as well as in the goodnefs of their ink and paper. They likewife lay claim to the invention of gunpowder ; and are vaftly fuperior to the Chinefe in the ufe of all forta of fire-arms, efpecially of artillery, as well as the curi- oufnefsof their fire works. Their manner of writing is much the fame as that of the Chinefe, viz. in columns from top to bottom, and the columns beginning at the right and ending at the left hand. Their charafters were alfo originally the fame, but now’ differ coniiderably. Their language hath fome affinity with the Chinefe, though it appears from its various dialefts to have been a kind of compound of that and other languages, de¬ rived from the various nations that fiift peopled thofe iflandg. JAP [ 71 3 JAP Japan. Jflands. It is not only very regular, polite, elegant, —* 1 and copious, but abounds with a great variety of fy- nonyma, adapted to the nature of the fubjeft they are ’ upon, whether fublime, familiar, or low ; and to the quality, age, and fex, both of the fpeaker and perfon fpoken to. The Japanefe are commonly very ingenious in moft handicraft trades ; and excel even the Chinefe in fe- veral manufa&ures, particularly in the beauty, good- nefs, and variety of their filks, cottons, and ether ftuffs, and in their japan and porcelain wares. No eaftern nation comes up to them in the tempering and * fabricating of feymitars, fwords, mufkets, and other fuch weapons. The Japanefe architecture is much in the Tame tafte and ftyle as that of the ChineTe, efpecially as to their temples, palaces, and other public buildings; but in private ones they affeft more plainnefs and neatnefs than fhow. TheTe lall are of wood and cement, confifting of two {lories: they dwell only in the lower; the upper chamber ferving for wardrobes. The roofs are covered with rufh-mats three or four inches thick. In every houfe there is a fmall court, ornamented with trees, flrrubs, and flower-pots ; as like wife with a place for bathing. Chimnies are unknown in this country, although fire is needed from the cold month of O6I0- ber till the end of March. They heat their rooms with charcoal contained in a copper ftove, which they fit round. Their cities are generally fpacious, having each a prince or governor refiding in them. The ca¬ pital of Jedo is zi French leagues in circumference; Its ftreets are ftraight and large. There are gates at little diftances, with an extremely high ladder, which they afeend to difeover fires. Villages differ from cities in having but one ftreet; which often extends •feveral leagues. Some of them are fituated fo near each other, that they are only feparated by a river or a bridge. The principal furniture of the Japanefe confitls in draw-mats, which ferve them for feats and. beds; a fmall table for every one who choofes to eat is the only moveable. The Japanefe fit always upon their hams. Before dinner begins, they make a pro¬ found bow and drink to the health of the guefts. The women eat by tbemfelves. During the courfes, they drink a glafs of fakki, which is a kind of beer made of rice kept conftantly warm; and they drink at each new morfel. Tea and fakki are the moil favou¬ rite drink of this people ; wine and fpirits are never ufed, nor even accepted when offered by the Dutch. Sakki, or rice beer, is clear as wine, and of an agree¬ able talle : taken in quantity, it intoxicates for a few moments, and caufes headach. Both men and women are fond of tobacco, which is in univerfal vogue and limoked continually. The gardens, about their houfes- are adorned with a variety of flowers, trees, verdure, baths, terraces, and other embelliihments. The furni¬ ture and decorations of the houfes of perfons of diftinc- tion confiil in japan-work of various colours, curious paintings, beds, couches, Ikreens, cabinets, tables, a variety of porcelain jars, vafes, tea-equipage, and other veffels and figures, together' with fwords, guns, fey¬ mitars, and other arms. Their retinues are more or lefs numerous and fplendid according to their rank; but there are. few of the lords who have lefs than 50 or 6cynen richly dad and armed, fome on foot, but moft on horfeback. As for their petty kings and princes, they are feldom feen without 300 or 200 at leaft, when they either wait on the emperor, which is one half of the year, or attend him abroad. When a prince or great man dies, there are comw monly about 10, 20, or more youths of his houfehold, and fuch as were his greateft favourites, who putthem- felves to a voluntary death, at the place where the bo¬ dy is but ied or burned: as foon as the funeral pile,, confifting of odoriferous woods, gums, fpices, oils, and other ingredients, is fet on fire, the relations and friends of the deceafed throw their prefents into it, fuch as cloaths, arms, vifluals, money, fweet herbs,, flowers, and other things which they imagine will be of ufe to him in the other world. Thofe of the middle or lower rank commonly bury their dead, without any other burning than that of fome odoriferous woods, gums, &c. The fepulchres into which the bones andf alhes of perfons of rank are depofited, are generally very magnificent, and fituated at fome diftance from the towns. The Dutch and Chinefe are the only nations al¬ lowed to traffic in Japan. The Dutch at prefent fend but two flrips annually, which are fitted out at Batavia, and fail in June, and return at the end of- the year. The chief merchandife is Japanefe copper and raw camphor. The wares which the Dutch com¬ pany import are, coarfe fugar, ivory, a great quantity of tin and lead, a little caff iron, various kinds of fine, chintzes, Dutch cloth of different colours and'finenefs, ferge wood for dyeing, tortife-fliell, and cojlus Arabicus. The little merchandife brought by the officers on-, their own account, confifts of faffron, theriaca, fealing- wax, glafs-beads, watches, &c. &c. About the time when the Dutch {hips are expe&ed, fereral outpofts are ilationed on the higheft hills by the government; they, are provided with telefcopes,.and long before their ar¬ rival give the governor of Nagafaki notice. As foon as they anchor in the harbour, the upper and under of¬ ficers of the Japanefe immediately betake themfelves on¬ board, together with interpreters; to whom is delivered- a chell, in: which all the failors books, the muffer-roll of the whole crew, fix fmall barrels of powder, fix bar¬ rels of balls, fix. mufkets, fix bayonets, fix piftols, and fix fwords, are depofited ; this is fuppofed to be the whole remaining ammunition after the Imperial garri- fon has been fainted. Thefe things are conveyed on {bore, and preferved in a feparate warehoufe, nor are they returned before the day the fhip quits the harbour.- Duties are quite unknown as well in the inland parts- as on the coaft, nor are there any cuftoms required either for exported or imported goods ; an advantage enjoyed by. few nations. But, to prevent the impor¬ tation of any forbidden wares, the utmoll vigilance is obferved ; then the men and things are examined with, the eyes of Argus. When any European goes on Ihore, he is examined before he leaves the Pnip, and afterwards on his landing. This double fearch is ex¬ ceedingly Uriel-; fo that not only the pockets and cloaths are ftroaked with the hands, but the pudendm. of the meaner fort are preffed, and the hair of the flaves. All the Japanefe who come on board are fearched in like manner, except only their fuperiop officers : fo alfo are the wares either exported or im-. ported, firft on board, and then at the factory, except JAP Japan, the great chefts, which are opened at the factory, and Japanning. f0 carefully examined that they ftrike the very fidesleft they ihould be hollow. The bed clothes are often o- pened, and the feathers examined : rods of iron are run into the pots of butter and confedtions: a fqUare hole is made in the cheefe, and a long-pointed iron is thruft into it in all diredtions. Their fufpicion h carried fo far, that they take out and break one or two of the eggs brought from Batavia. The interpreters are all natives 5 they fpeak Dutch in different degrees of purity. The government per¬ mits no foreigner to learn their language, left they ftiould by means of this acquire the knowledge of the manufadtures of the country ; but forty or fifty inter¬ preters are provided to ferve the Dutch in their trade, or on any other occafion. The interpreters are very inquifitive after European books, and generally provide themfelves with fome from the Dutch merchants. They perufe them with care, and remember what they learn. They befides endeavour to get fnftrudtion from the Europeans; for which purpofe they afk numberlefs queftions, particu¬ larly refpedting medicine, phyfics, and natural hiftory. Moft of them apply to medicine, and are the only phyficians of their nation who pradtife in the European manner, and with European medicines, which they procure from the Dutch phyficians. Hence they are able to acquire money, and to make themfelves re- fpedted. Japan Earth. See Mimosa and Terra Japonica. JAPANNING, the art of varnilhing and drawing figures on wood, in the fame manner as is done by the natives of Japan in the Eaft Indies. The fubltances which admit of being japanned are al- moft every kind that are dry and rigid, or not too flexi¬ ble ; as wood, metals, leather, and paper prepared. Wood and metals do not require ahy other prepara¬ tion, but to have their furface perfectly even and clean: but leather ftiould be fecurely ftrained either on frames or on boards ; as its bending or forming folds would otherwife crack and force off the coats of varnifti: and paper fhould be treated in the fame manner, and have a previous ftrong coat of fome kind of fize ; but it is rarely made the fubjedt of japanning till it is converted into papier macbe, or wrought by other means into fuch form, that its original ftate, particularly with refpedt to flexibility, is loft. One principal variation from the method formerly ufed in japanning is, the ufing or omitting any priming or undercoat on the work to be japanned. In the ol¬ der pra&ice, fuch priming was always ufed 5 and is at prefent retained in the French manner of japan¬ ning coaches and fnuff-boxes of the papiermache ; but in the Birmingham manufadture here, it has been al-- ways rejedted. The advantage of ufing fuch priming or undercoat is, that it makes a faving in the quantity of varnifh ufed ; becaufe the matter of which the priming is compofed fills up the inequalities of the body to be varnilhed; and makes it eafy, by means of rubbing and water-pohftiing, to gain an even fur- face for the varnifti: and this was therefore fuch a convenience in the cafe of wood, as the giving a hard- nefs and tirmnefs to the ground was alfo in the cafe of leather, that it became an eftabliftied method ; and is N°. 162. J A P therefore retained even in the inftance of the Japar.nlng mache by the French, who applied the received me-1 v***- thod of japanning to that kind of work on its intro- dudtion. There is neverthelefs this inconvenience al¬ ways attending the ufe of an undercoat of fize, that the japan ooats of varnifti and colour will be conftaritly liable to be cracked and peeled off by any violence, and will not endure near fo long as the bodies japan¬ ned in the fame manner, but without any fuch prim¬ ing j as may be eafily obferved in comparing the wear of the Paris and Birmingham fnuff-boxes ; which lat¬ ter, when good of their kind, never peel or crack, or fuffer any damage, unlefs by great violence, and fuch a continued rubbing as waftes away the fubftance of the varnifti; while the japan coats of the Parifian £rack and fly off in flakes, whenever any knock or fall, par¬ ticularly near the edges, expofe them to be injured. But the Birmingham manufa&urers, who originally pra&ifed the japanning only on metals, to which the reafon above given for the ufe of priming did not ex¬ tend, and who took up this art of themfelves as an invention, of courfe omitted at firft the ufe of any fuch undercoat ; and not finding it more neceffary in the inftance of papier mache, than on metals, continue ftill to reject it. On which account, the boxes of their manufadture are, with regard to the wear, great¬ ly better than the French. The laying on the colours in gum-water, inftead of varnifti, is alfo another variation from the method of japanning formerly pradtifed : but the much greater ftrength of the work, where they are laid on in varniftt or oil, has occafioned this way to be exploded with the greateft reafon in all regular manufadlures : how¬ ever, they who may pradtice japanning on cabinets, of other fuch pieces as are not expofed to much wear and violence, for their ahiufement only, and confequently may not find it worth their while to encumber them¬ felves with the preparations neceffary for the other methods, may paint with water-colours on an under¬ coat laid on the wood or other fubftance of which the piece to be japanned is formed ; and then finifti with the proper coats of varnifli, according to the methods below taught : and if the colours are tempered with the ftrongeft ifinglafs fize and honey, inftead of gum- water, and laid on very flat and even, the work will not be much inferior in appearance to that done by the other method, and will laft as long as the old japan. Of Japan Grounds.—The proper grounds are either fuch as are formed by the varnifti and colour, where the whole is to remain of one fimple colour; or by the varnifti either coloured or without colour, on' which fome painting or other decoration is afterwards to be laid. It is neceffary, however, before we pro¬ ceed to fpeak of the particular grounds, to ftiow the manner of laying on the priming or undercoat, where any fuch is ufed. This priming is of the fame nature with that called dear coating, or vulgarly clear-coaling, praftifed erro- neoufly by the houfe-painters; and confifts only in laying on and drying in the moft even manner a com- pofition of fize and whiting, or fometimes lime inftead of the latter. The common fize has been generally ufed for this purpofe ! but where the work is of a.nicer1 kind; [ ] 'frj Japan, 'Janijxaii JAP E 73 .1 , ktn^, i't U better to employ the glover’s or the parch- mains hither a defideratumj ; ment fsze ; and if a third of ifinglafs be added, it will be ft ill better, and, if not laid on too thick, much lefs liable to peel and crack. The work ftiould be pre¬ pared for this priming, by being well fmoothed with the fifh (kin .or glafs-fhaver ; and, being made tho¬ roughly clean, (hould be brufhed over once or twice with hot fize, diluted with two thirds of water, if it be of the common ftyength. The priming {hould then be laid on with a bruftx as even as poffible ; and {hould be formed of a fize whofe confidence is be¬ twixt the common kind’and glue, mixed with as much W’hiting as will give it a fufficient body of colour to hide the furface of whatever it is laid upon, but not more. If the furface be very clean on which the priming is ufed, two coats of it laid on in this manner will be fufficient ; but if, on trial with a fine wet rag, it will not receive a proper water polifti on account of any inequalities not Efficiently filled up and covered, two or more coats muft be given it ; and whether a greater or lefs number be ufed, the work (hould^ be fmoothed, after the laft coat but one is dry, by rubbing it with the Dutch nifties. When the laft coat is dry, the water polifti ftionld be given, by paffing over every part of der, in about a quart of fpirit of it with a fine rag gently moiftened, till the whole ap- the clear varnifti," pear perfectly plain and even. The priming will then be completed, and the work ready to receive the painting or coloured varnifti ; the reft of the proceed¬ ings being the fame in this cafe as where no priming is ufed. When wood or leather is to be japanned, and no priming is ufed, the beft preparation is to lay two or three coats of coarfe varnifti compofed in the following JAP or matter fought for, inr the art of japanning, as there are no fubftances which u form a very hard varnifti but what have too much co¬ lour not to deprave the whitenefs, when laid on of a due thicknefs over the work. The neareft approach, however, to a perfect whit£ varnifti, already known, is made by the following com- pofition. “ Take flake white, or white lead, wafhedover and ground up with a fixth of its weight of llarch, and then dried ; and temper it properly for fpreading with the maftich varnifli prepared as under the article Var¬ nish. “ Lay thefe on the body to be japanned, prepared either with or without the undercoat of whiting, in the manner as above ordered ; and then varnifti it over with five or fix coats of the following varnifti : “ Provide any quantity of the beft feed lac ; and pick out of it all the cleared and whiteft: grains, re- ferving the more coloured and fouler parts for the coarfe varnifties, fuch as that ufed for priming or pre¬ paring wood or leather. Take of this picked feed-lae two ounces, and of gum animi three ounces ; and dif- folve them, being previoufly reduced to a grofs pow- and ftrain off manner : The feed-lac will yet give a flight tinge to this com- pofition ; but cannot be omitted where the varnifti is wanted to be hard; though, when a fofter will anfwer the end, the proportion mAy be diminiftied, and a lit* tie crude turpentine added to the gum-animi to take off the brittlenefs. A very good varnifti, free entirely from all brittlenefs, may be formed by diffolving as much gum-animi as the oil will take, in old nut or poppy oil; which muft: be “ Take of rectified fpirit of wine one pint, and of made to boil gently when the gum is put into it. The " ' ' ground of white colour itfelf may be laid on in this varnifh, and then a coat or two of it may be put over the ground; but it muft be well diluted with oil of turpentine when it is ufed. This, though free from brittlenefs, is neverthelefs liable to fuffer by being in¬ dented or bruifed by any flight ftrokes; and it will not well bear any polifti, but may be brought to a very fmooth furface with#ut, if it be judicioufly managed in the laying it on. It is likewife fomewhat tedious in drying, and will require fome time where feveral coats are laid on ; as the laft ought not to contain much oil of turpentine. Blue Japan Grounds.—Blue japan grounds may be formed of bright Pruffian blue, or of verditer glazed over by Pruffian blue, or of fmalt. The colour may be beft mixed with fhell-lac varnifli, and brought to a polifhing ftate by five or fix coats of varnifti of feed- hen alfo other means muft be lac : but the varnifti, neverthelefs, will fomewhat in¬ jure the colour by giving to a true blue a caft of green, and fouling in fome degree a warm blue.by the yellow here^ therefore, a bright blue is requi- coarfe feed-lac and refin each two ounces- Diffolve the feed-lac and refin in the fpirit; and then ftrain off the varnifti.” This varnifti, as well as all others formed of fpirit of wine, muft be laid on in a warm place ; and, if it can be conveniently managed, the piece of work to be varniftied (hould be made warm likewife ; and for the fame reafon all dampnefs {hould be avoided ; for either cold or moifture chills this kind of varnifli, and pre¬ vents its taking proper hold of the fubftance on which it is laid.' When the work is fo prepared, or by the priming with the compofition of fize and whiting above de- feribed, the proper japan ground muft be laid on, which is much the beft formed of ftiell-lac varnifti, and the colour defired, if white be not in queftion, which demands a peculiar treatment, or great bright- nefs be not required, purfued. The colours ufed with the {hell-lac varnifli may be any pigments whatever which give the teint of the ground defired ; and they may be mixed together to red, and a lefs degree of hardnefs can be difpenfed form browns or any compound colours. As metals never require to be undercoated with whiting, they may be treated in the fame manner as wood or leather, when the undercoat is omitted, ex¬ cept in the inftances particularly fpoken of below. White Japan Grounds —The forming a ground per- feftly white, and of the firft degree of hardnefs, re- Von.IX. Parti. with, the method before dire&ed in the cafe of white grounds muft be purfued. Red Japan Grounds.—-For a fcarlet japan ground, vermilion may be ufed : but the vermilion has a glaring effeft, that renders it much lefs beautiful than the crimfon produced by glazing it over with carmine or fine lake ; or even with rofe-pink, which has a very K good JAP [ 74 1 JAP Japan, good effeft ufed for this ptirpofe. For a very bright 1 crimfon, neverthelefs, inftead of glazing with carmine, the Indian lake (hould be ufed, diffolved in the fpirit ©f which the varnifh is compounded, which it readily admits of when good: and, in this cafe, inftead of glazing with the ftiell-lac varnifh, the upper or polifh- ing coats need only be ufed ; as they will equally re¬ ceive and convey the tinge of the Indian lake, which may be actually diflblved by fpirit of wine : and this will be found a much cheaper method than the ufing carmine. If, neverthelefs, the higheft degree of bright- nefs be required, the white varnifhes muft be ufed. Yellow Javan Grounds. For bright yellow grounds, the king’s yellow, or the turpeth mineral, fhould be employed, either alone or mixed with fine Dutch pink : and the effeft may be ftill more height¬ ened by diffolving powdered turmeric-root in the fpirit of wine of which the upper or polifhing coat is made ; which fpirit of wine muft be ftrained from off the dregs before the feed-lac be added to it to form the varnifh. The feed-lac varnifh is not equally injurious here, and with greens, as in the cafe of other colours; be- caufe, being only tinged with a reddifh yellow, it is little more than an addition to the force of the colours. Yellow grounds maybe likewife formed of the Dutch pink only ; which, when good, will not be wanting in brightnefs, though extremely cheap. Green Japan Grounds.—Green grounds may be produced by mixing the king’s yellow and bright Pruf- fian blue, or rather the turpeth mineral and Pruffian blue ; and a cheap, but fouler kind, by verdegris with a little of the abovementioned yellows, or Dutch pink. But where a very bright green is wanted, the cryftals of verdegris, called diftilled verdegris, fhould be employed; and to heighten the effeft they fhould be laid on a ground of leaf-gold, which renders the co¬ lour extremely brilliant and pleafing. They may any of them be ufed fuccefsfully with good feed-lac varnifh, for the reafon before given ; but will be ftill brighter with white varnifh. Orange-coloured Japan Grounds.—Orange-coloured japan grounds may be formed by mixing vermilion or red-lead with king’s yellow, or Dutch pink; or the orange-lac, which will make a brighter orange ground than can be produced by any mixture. Purple Japan Grounds.—Purple japan grounds may be produced by the mixture of lake and Pruffian blue ; or a fouler kind, by vermilion and Pruffian blue. They may be treated as the reft with refpedt to the varnifh. Black Japan Grounds to be produced without Heat.—- Black grounds may be formed by either ivory-black of lamp-black : but the former is preferable where it is perfeflly good. Thefe may be always laid on with fhell-lac varnifh ; and -have their upper or polifhing coats of common feed-lac varnifh, as the tinge or foulnefs of the varnifh can be here no injury. Common Black Japan Grounds on Iron or Copper, produced by means of Heat. For forming the common black japan grounds by means of heat, the piece of work to be japanned muft be painted over with dry¬ ing oil ; and, when it is of a moderate drynefs, muft be put into a ftove of fuch degree of heat as will change the oil to black, without burning it fo as to deftroy or weaken its tenacity. The ftove fhould not be too hot when the work is put into it, nor the heat increafed Japan, too faft ; either of which errors would make it blifter : but the flower the heat is augmented, and the longer it is continued, provided it be reftrained within the due degree, the harder will be the coat of japan. This kind of varnifh requires no polifh, having re¬ ceived, when properly managed, a fufficient one from the heat. The fine Tortoife-Jhell Japan Ground produced by means of Heat.—The beft kind of tortoife-fhell ground pro¬ duced by heat is not lefs valuable for its great hardnefs, and enduring to be made hotter than boiling water without damage, than for its beautiful appearance. It is to be made by means of a varnifh prepared in the following manner: “ Take of good linfeed-oil one gallon, and of umbre half a pound: boil them together till the oil become very brown and thick : ftrain it then through a coarfe cloth, and fet it again to boil; in which ftate it muft: be continued till it acquire a pitchy confiftence ; when it will befit forufe.” Having prepared thus the varnifh, clean well the iron or copper plate or other pieces which is to be ja¬ panned ; and then lay vermilion tempered with fhell- lac varnifh, or with drying-oil diluted with oil of tur¬ pentine, very thinly, on the places intended to imitate the more tranfparent parts of the tortoife-fhell. When the vermilion is dry, brufh over the whole with the black varnifh, tempered to a due confiftence with oil of turpentine; and when it is fet and firm, put the work into a ftove, where it may undergo a very ftrong heat, and muft be continued a confiderable time ; if even three weeks or a month, it will be the better. This was given amongft other receipts by Kunckel; but appears to have been neglected till it was revived with great fuccefs in the Birmingham manufactures, where it was not only the ground of fnuff-boxes, drefs- ing-boxes, and other fuch leffer pieces, but of thofe beautiful tea-waiters which have been fo juftly efteemed and admired in feveral parts of Europe where they have been fent. This ground may be decorated with painting and gilding, in the fame manner as any other varnifhed furface, which had beft be done after the ground has been duly hardened by the hot ftove ; but it is well to give a fecond annealing with a more gentle heat after it is finifhed. Method of painting Japan Work.—Japan work ought properly to be painted with colours in varnifh; though, in order for the greater difpatch, and, in fome very nice works in fmall, for the freer ufe of the pencil, the colours are fometimes tempered in oil; which fhould previoufly have a fourth part of its weight of gum- animi difiblved in it; or, in default of that, of the gums fandarac or maftich. When the oil is thus ufed, it fhould be well diluted with fpirit of turpentine, that the colours may be laid more evenly and thin ; by which means, fewer of the polifhing or upper coats of varnifh become neceffary. In fome inftances, water-colours are laid on grounds of gold, iu the manner of other paintings ; and are beft:, when fo ufed, in their proper appearance, without any varnifh over them ; and they are alfo fometimes fo managed as to have the effeCt of emboffed work. The colours employed in this way, for painting, are heft pre- Japan. JAP r 75 ] JAP prepared by means of ifinglafs fize corre&ed with ho¬ ney or fugar-candy. The body of which the emboffed work is raifed, need not, however, be tinged with the exterior colour; but may be bell formed of very ftrong gum-water, thickened to a proper confillence by bole- armenian and whiting in equal parts ; which being laid on the proper figure, and repaired when dry, may be then painted with the proper colours tempered in the ifinglafs fize, or in the general manner with Ihell-lac varnilh. Manner of Varnijhing Japan Work—The lad and finilhing part of japanning lies in the laying on and polishing the outer coats of varnilh ; which are necef- fary, as well in the pieces that have only one Ample ground of colour, as with thofe that are painted. This is in general beft done with common feed-lac varnilh, except in the inftances and on thofe occafions where we have already Ihown other methods to be more ex¬ pedient : and the fame reafons which decide as to the fitnefs or impropriety of the varnilhc-s, with refpedt to the colours of the ground, hold equally with regard to thofe of the painting : for where brightnefs is the moft material point, and a tinge of yellow will injure it, feed-lac mull give way to the whiter gums; but where hardnefs, and a greater tenacity, are mod eflfen- tial, it mud be adhered to ; and where both are fo ne- celfary, that it is proper one fhould give way to the other in a certain degree reciprocally, a mixed varnilh mud be adopted. This mixed varnilh, as we have already obferved, fhould be made of the picked feed lac. The com¬ mon feed-lac varnilh, which is the mod ufeful pre¬ paration of the kind hitherto invented, may be thus made: “ Take of feed-lac three ounces, and put it into water to free it from the dicks and filth that are fre¬ quently intermixed with it ; and which mud be done by fiirring it about, and then pouring off the water, and adding frefh quantities in order to repeat the ope¬ ration, till it be freed from all impurities, as it very effe&ually may be by this means Dry it then, and powder it grofsly, and put it, with a pint of re&ified fpirit of wine, into a bottle, of which it will not fill above two-thirds. Shake the mixture well together ; and place the bottle in a gentle heat, till the feed appear to be diffolved ; the disking being in the mean time repeated as often as may be convenient: and then pout off all that can be obtained clear by this method, and drain the remainder through a coarfe cloth. The varnilh thus prepared mult be kept for ufe in a bottle well dopt.” When the fpirit of wine is very drong, it will dif folve a greater proportion of the feed lac : but this will iaturate the common, which is feldom of a drength fufficient for making varnilhes in perfeftion. As the chilling, which is the mod inconvenient accident at¬ tending thofe of this kind, is prevented, or produced more frequently, according to the drength of the fpirit ; we lhall therefore take this opportunity of fhowing a method by which weaker rectified fpirits may with great eafe, at any time, be freed from the phlegm, and rendered of the fird degree of drength. “ Take a pint of the common reftified fpirit of wine, and put it into a bottle, of which it will not fill above three parts. Add to it half an ounce of pearl- alhes, fait of tartar, or any other alkaline fait, heated red-hot, and powdered, as well as it can be without much lofs of its heat. Shake the mixture frequently for the fpace of half an hour ; before which time, a great part of the phlegm will be feparated from the fpirit, and will appear, together with the undiffolved part of the falls, in the bottom of the bottle. Let the fpirit then be poured off, or freed from the phlegm and falls, by means of a tiitorium or feparating funnel; and let half an ounce of the pearl-alhes, heated and powdered as before, be added to it, and the fame treatment repeated. This may be done a third time, if the quantity of phlegm feparated by the addition of the pearl alhes appear conliderable. An ounce of alum reduced to powder and made hot, but not burnt, mult then be put into the ipiric, and fuffered to remain fome hours ; the bottle being frequently lhaken : after which, the fpirit, being poured off from it, will be fit for ufe.” The addition of the alum is neceffary, to neutralize the remains of the alkaline fait or pearl-alhcs ; which would otherwife greatly deprave the fpirit with re pe£t to varnilhes and laquer, where vegeta >le colours are concerned; and mud. confequently render another ditlil- lation neceffary. The manner of ufing the feed lac or white var- nifhes is the fame, except with regard to the fubdance ufed in polilhing ; which, where a pure white or great clearnefs of other colours is in quedion, Ihould be it- felf white : whereas the browner forts of polilhing dud, as being cheaper, and doing their buiinefs with greater difpatch, may be ufed in o her cafes. The pieces of work to be varnilhed Ihould be placed near a fire, or in a room where there is a dove, and made perfetdly dry ; and then the varnilh may be rubbed over them by the proper brulhes made for that purpofe, begin¬ ning in the middle, and palling the brulh to one end ; and then with another droke from the middle, palling it to the other. But no part Ihould be eroded or twice paffed over, in forming one coat, where it can poflibly be avoided. When one coat is dry, another mud be laid over it; and this mud be continued at lead hve or fix times, or more, if on trial there be not fulficient thicknefs of varnilh to bear the polilh, without laying bare the painting or the ground colour underneath. When a fufficient number of coats is thus laid on, the work is fit to be polilhed : which mult be done, in common cafes, by rubbing it with a rag dipped in Tripoli or pumice-Aone, commonly called rotten jlonet finely powdered: but towards the end of the rubbing, a little oil of any kind (h.iuld be ufed along with the powder; and when the work appears fufficirntly bright and gloffy, it Ihould bts well rubbed with the oil alone, to clean it from the powder, and give it a dill brighter luilre. In the cafe of white grounds, inftead of the Tripoli or pumice-done, fine putty or whiting mult be ufed ; both which Ihould be walhed over to prevent the dan¬ ger of damaging the work from any fand or other gritty matter that may happen to be commixed with them. It is a great improvement of all kinds of japan woik, to harden the vaniilh by means 01 heae; winch. J A Q [ 76 ] JAR Japheth In every degree that it can be applied ihort of what M ' would burn or calcine the matter, tends to give it a j.:he operation for two or three minutes, the water will be frozen as it were in an in'tant; and the opacity will afeend to C in lefs than half a fecondof time which makes a beautiful ap¬ pearance. This congelation, however, is only fuper- fioial ; and in order to congeal the whole quantity of water, the operation mulf be continued a minute or two longer; after which the wire H will be found kept very tight by the ice. The hand mull then be applied to the outfide of the tube, in order to fuften L 2 the 1 C E Ice. the furface of the ice ; which wouhl otherwise adhere very firmly to the glafs ; but when this is done, the wire H eafily brings it out. Sometimes our author was accuftomed to put into the tube a {mail thermometer inftead of the wire H ; and thus he had an opportunity of obferving a very curious phenomenon unnoticed by others, viz. that in the winter time water requires a fmaller degree of cold to congeal it than in the fummer. In the winter, for inftance, the water in the tube AB will freeze when the thermometer Hands about 30c$ but in the fummer, or even when the thermometer Hands at 6o2, the quick- fdver mull be brought down 10, 15, or even more de¬ grees below the freezing point before any congelation can take place. In the fummer time therefore a greater quantity of ether, and more time, will be re¬ quired to congeal any given quantity of water than in winter. When the temperature of the atmofphere has been about 40s, our author has been able to congeal a quantity of water with an equal quantity of good ether; but in fummer two or three times the quantity are required to perform the efifedl. “ There feems (fays he) to be fomething in the air, which, befides beat, interferes with the freezing of water, and per¬ haps of all fluids t though I cannot fay from my own experience whether the above mentioned difference between the freezing in winter and fummer takes place with other fluids, as milk, oils, wines,” &c. The proportion of ether requifite to congeal water feems to vary with the quantity of the latter ; that is, a large quantity of water feems to require a prc- portionably lefs quantity of ether to freeze it than a fmaller one. “ In the beginning of the fpring (fays Mr Cavallo), I froze a quarter of an ounce of water with about half an ounce of ether ; the apparatus be¬ ing larger, though fimilar to that defcribed above. Now as the price of ether, fufficiently good for the purpofe, is’generally about i8d. or 2s. per ounce, it is plain, that with an expence under two {hillings, a quarter of an ounce of ice, or ice cream, may be made, in every climate, and at any time, which may afford great fatisfaftion to thofe perfons, who, living in thofe places where no natural ice is to be had, never faw or tailed any fuch delicious refrefhment. When a ftnall piece of ice, for inftance, of about ten grains weight, is required, the neceffary apparatus is very fmall, and the expence not worth mentioning. I have a fmall box four inches and a half long, two inches broad, and one and a half deep, containing all the apparatus ne- ^effary for this purpofe; viz. a bottle capable of con¬ taining about one ounce of ether ; two pointed tubes, in cafe one Ihould break; a tube in which the water is to be frozen, and a wire. With the quantity of ether contained in this fmall and very portable appa¬ ratus, the experiment may he repeated about ten times. A peifon who wilbes to perform fuch experiments in hot climates, and in places where ice is not eafily pro¬ cured, requires only a larger bottle of ether befides the whole apparatus defcribed above.” Electricity in- creafes the cold produced by means of evaporating ether but very little, though the effeft is perceptible. Having thrown the electrified and alfo the unele&ri- fied ftream of ether upon the bulb of a thermometer, the mercury was brought down, two degrees lower in the former than in the latter cafe. I G E Our author obferves, for the fake of thofe who may* be inclined to repeat this experiment, that a cork con¬ fines this volatile fluid much better than a glafs {topple,, which it is almoft impoflible to grind with fiich exatft- nefs as to prevent entirely the evaporation of the ether. When a ftopple, made very nicely out of an uniform and clofe piece of cork, which goes rather tight, is- put upon a bottle of ether, the finell of that fluid can¬ not be perceived through it ; but he never faw a glafs Hopple which could produce that effed. In this man¬ ner, ether, fpirit of wine, or any other volatile fluid, may be preferved, which does not corrode cork by its fumes. When the Hopple, however,.is very often taken ouE', it becomes loofe, as it will alfo do by long keep¬ ing; in either of which cafes it mull be changed. Blink of the Ice, is a name given by the pilots to a bright appearance near the horizon occaiioned by the ice, and obferved before the ice itfclf is feen. Ice-Boats, boats fo c-.mHructed as to fail upon ice,, and which are very common in Holland, particularly upon the river Maefe and the lake Y. See Plate CCL. They go with incredible fwiftnefs, fometimes fo quick as to affeft the breath, and are found very ufeful in. conveying goods and paffengera over lakes and great rivers in that country. Boats of different lizes are pla¬ ced in a tranfverfe form upon a 2^ or 3 inch deal board; at the extremity of each end are fixed irons, which turn up in the form of flcaits ; upon this plank the boat refls, and the two ends feem as out-riggers to prevent overfetting ; whence ropes are fafiened that lead to the head of the mail in the nature of Ihrowds, and others paffed through a block acrofs the bowfprit: the rudder is made Comewhat like a hatchet with the head placed downward, which being preffed down, cuts the ice, and ferves ail the purpofes of a rudder in the water, by enabling the helmfman to Heer, tack, &c. Method of making Ice-Cream. Take a fufficient quantity of cream, and, when it is to be mixed with rafpberry, or currant, or pine, a quarter part as much- of the juice or jam as of the cream: after beating and ffraining the mixture through a cloth, put it with a little juice of lemon into the mould, which is a pewter veffel, and varying in fizeand (hape at pW’afiue; cover the mould and place it in a pail about two-thirds full of ice, into which two handfuls of fait have been thrown ; turn the mould by the hand-hold with a quick motion, to and fro, in the manner ufed for milling chocolate, for eight or ten minutes; then let it reff as long, and turn it again for the fame time; and having left it to Hand half an hour, it is fit to be turned out of the mould and to be fent to table. Lemon juice and fugar, and. the juices of various kinds of fruits, are frozen with¬ out cream ; and when cream is ufed, it fliouki be well, mixed. Ics-HUhy a fort of Hru&ure or contrivance common, upon the river Neva at Peterlburgh, and which afford a perpetual fund of amufement to the populace. They are conffrunted in the following manner. A fcaffolding; is raifed upon the river about 30 feet in height, with a landing place on the top, the afeent to which is by a. ladder. From this fummit a Hoping plain of boards, about four yards broad and 30 long, defeends to. the fuperficies of the river: it is fupported by ffrong poles gradually decreafing in height, and its fides are defended by a parapet of planks. Upon thefe boards are [ 84 1 Plate CCL . I C E Tee. laid {qiiare mafTes of ice about four inches thick, which r~~~l being hr ft fmoothed with the axe and laid clofe to each other, are then fprinkled with water: by thefe means they coalcfce, and, adhering to the boards, immediate¬ ly form an inclined plain of pure ice. From the bot¬ tom of this plain the fnow is cleared away for the length of zoo yards and the breadth of four, upon the level bed of the river; and the fides of this courfe, as well as the fides and top of the fcaffolding, are ornamented with firs and pines. Each perfon, being provided with a fledge, mounts the ladder; and having attained the fuinmit, he lets himfelf upon his fledge at tl*e upper extremity of the inclined plain, down which he fufftrs it to glide with coniiderable rapidity, poifing it as he goes down; when the velocity acquired by the de- feent carries it above too yards upon the level ice of the river. At the end of this courfe, there is ufually a fim’- lar ice-hill, nearly parallel to the former, which begins where the other ends ; fo that the perfon immediately mounts again, and in. the fame manner glides down tlie other inclined plain of ice. This diverfion he re¬ peats as often as he pleafes. The boys alfo are conti¬ nually employed in Ikaiting down thefe hills : they glide chiefly upon one Ikait, as they are able to poife themfelves better upon one leg than upon two. Thefe ice-hills exhibit a pleafing appearance upon the river, as well from the trees with which they are ornamented, as from the moving obje&s which at particular times of the day are defeending without intermiflion. IcR-Houfe, a repofitory for ice during the ftimmer months. The afpe& of ice houfes fliould be towards theeaft or fouth-eaii, for the advantage of the morning fun to expel the damp air, as that is more pernicious than warmth; for which reafon trees in the vicinity of an ice-houfe tend to its difadvantage. The bell foil for an ice-houfe to be made in is chalk, as it conveys away the wafte water without any artifi¬ cial drain ; next to that, ioofe ftony earth or gravelly foil. Its fituation fhouid' be on the fide of a hill, for the advantage of entering the cell upon a level, as in •the drawing, Plate CCL. To conftruCt an ice-houfe, firft choofe a proper place at a convenient difiance from the dwelling-houfe or itoufes it is to ferve : dig a cavity (if for one family, of the dimenfions fpecified in the defign) of the figure of an inverted cone, finking the bottom, concave, to form a refervoir for the wafte water till it can drain off; if the foil requires it, cut a drain to a confiderable di- ftance, or fo far as will come out at the fide of the hill, ©r into a well, to make it communicate with the fprings, and in that drain form a ftink or air-trap, mark¬ ed/, by finking the drain fo much lower in that place as it is high, and bring a partition from the top an inch or more into the water, which will confequently be in the trap ; and will keep the well air-tight. Work up a fufficient number of brick piers to receive a cart* .wheel, to be laid with its convex fide upwards to re* ceive the ice; lay hurdles and ttraw upon the. wheel,, which will let the melted ice drain through, and ferve as a floor. The fides and dome of the cone are to be nine inches thick—the fides to be done in fteened brickwork, i. e. without mortar^ and wrought at right angles to the face of the work: the filling in behind fliould be with gravel, loofe ftones, or brick-bats, that the water which duio* through the fides may the more i c E eafily efcape into the well. The doors of the ice- houfe fhouid be made as clofe as poffilde, and bandies of flraw placed always before the inner door to keep out the air. Defcription of the parts referred to by the letters. a The line firft dug out. b The brick circumference of the cell, c The diminution of the cell downwards. d The Idler diameter of the cell, e The cart wheel or joifts and hurdles. / The piers to receive the wheel or floor, g The principal receptacle for draw, h The inner paffage, i the firft entrance, i the outer door, paffages having a feparate door each. / An air trap. m The well, n The profile of the piers, o The ice filled in. p The height of the cone, q The dome worked in two half brick arches, r The arched paf¬ fage. s The door-ways inferted in the walls, t The floor ®f the paffage. u An aperture through which the ice may be put into the cell; this mufl be covered next the crown of the dome, and then filled in with earth* * The Hoping door, againtl which the ftraw fhouid be laid. The ice when to be put in fhouid be collefled du¬ ring the froft, broken into fmall pieces, and rammed down hard in ftrata of not more than a foot, in order to make it one complete body ; the care in putting itc m, and well ramming it, tends much to its preferva- tion. In a feafon when ice is not to be had in fufficient quantities fnow may be fubftituted. Ice may be preferved in a dry place under ground, by covering it well with chaff, ftraw, or reeds. Great ufe is made of chaff in fome places of Italy to preferve ice : the ice-houfe for this purpofe need only be a deep bole dug in the ground on the fide of a hill, from the bottom of which they can eafily carry out a drain, to let out the water which is feparated at any time from the ice, that it may not melt and fpoil the reft. If the ground is tolerably dry, they do not line the fides with any thing, but Wave them naked, and on¬ ly make a covering of thatch over the top of the hole this pit they fill either with pure fnow,, or elfe with ice taken from the purell and cleareft water; becaufethey do not ufe it as we do in England, to fet the bottles in, but really mix it with the wine. They firft cover the bottom of the hole with chaff, and then lay in the ice, not letting it any where touch the fides, but ram¬ ming in a large bed of chaff all the way between : they- thus carry on the filling to the top, and then cover the furface with chaff; and in this manner it wilW keep as long as they pleafe. When they take any of it oat for ufe, they wrap the lump up in chaff, and it may then be carried to any diftant place without wafte or running. IcE-IJland, a name given by failors -to a great quan¬ tity of ice collected into one huge folid mafs, and float¬ ing about upon the feas near er within the Polar circles. — Many of thefe fluctuating iflands are met with on the coafts of Spitzbergen, to the great danger of the flapping employed in the Greenland fifhery. In themidft of thofe tremendous maffes navigators have been arrett¬ ed and frozen to death. In this manner the brave Sic Hugh Willoughby perifhed with all his crew in 1555; and in the year 1773, Lord Mulgravc, after every ef¬ fort which the moft finifhed feaman could make to ac- complifb the end of his voyage, was caught in the ice,, and was near experiencing the fame unhappy fate. See- thev [ S5 1 ' ICE [ 85 ] ICE ttifi account at large in Phipps’s Voyage to the North are continually increafed in height by the freezing of fse Pole. As there defcribed, the fcene, diverted of the the fpray of the fea, or of the melting of the fnow, II ’ j horror from the eventful expectation of change, was which falls on them. Thofe which remain in this fro- . f the moll beautiful and pidurefque :— Two large fhips zen climate receive continual growth; others are gra- * becalmed in a yaft bafon, furrounded on all iides by dually wafted by the northern winds into fouthern la- iflands of various forms: the weather clear : the fun titudes. and melt by degrees, by the heat of the fun, gilding the circumambient ice, which was low, fmooth, till they wafte away, or difappear in the boundlefs and even; covered with fnow, excepting where the element. pools of water on part of the furface appeared cryftal- The collifion of the great fields of ice, in high lati- line with the voting ice : the fmall fpace of fea they tudes, is often attended with a noife that for a time were confined in perfe&ly fmooth. After fruitlefs at- takes away the fenfe of hearing anything elfe ; and the tempts to force a way through the fields of ice, their leffer with a grinding of unfpeakable horror. The wa- limits were perpetually contracted by its clofing ; till at ter which dafhes againft the mountainous ice freezes in¬ length it befet each veflel till they became immoveably to an infinite variety of forms ; and gives the voyager fixed. The fmooth extent of furface was foon loft : ideal towns, ftreets, churches, fteeples, and every lhape the prefiure of the pieces of ice, by the violence of the which imagination can frame, fwell, caufed them to pack ; fragment rofe upon frag- IcR-Plant. See Mesembryanthemum. ment, till they were in many places higher than the ICEBERGS, are large bodies of ice filling the val- main-yard. The movements of the (hips were tremen- leys between the high mountains in northam latitudes, dous and involuntary, in conjunction with the fur- Among the moft remarkable are thofe of the eaft coart ronnding ice, aduated by the currents. The water of Spitzbergen ; (fee Greenland, n° 10.) They are ftioaled to 14 fathoms. The grounding of the ice or feven in number, but at confiderable diftances from of the (hips would have been equally fatal: The force each other: each fills the valleys for trafts unknown, of the ice might have crufhed them to atoms, or have in a region totally inacceffible in the internal parts, lifted them out ot the water and overfet them, or have The glaciers * of Switzerland feem contemptible to» «;ee left them fufpended on the fummits of the pieces of ice thefe ; but prefent often a fimilar front irtto fome lower tiers. at a tremendous height, expofed to the fury of the valley. The laft exhibits over the fea a front 300 feet winds, or to the nik of being darted to pieces by high, emulating the emerald in colour : cataraCfs of the failure of their frozen dock. An attempt was made melted fnow precipitate down various parts, and black to cut a paflage through the ice ; after a perfeverance fpiring mountains, (freaked with whi'e, bound the worthy of Britons, it proved fruitlefs. The comman- fides, and rife crag above crag, as far as eye can reach ^ der,.at all times mafter of himfelf, directed the boats in the back ground. See Plate CCLI. Attimesim- to be made ready to be hauled over the ice, till they menfe fragments break off, and tumble into the water, arrived at navigable water (a talk alone of feven days), with a molt alarming darting. A piece of this vivid and :n them to make their voyage to England. The green fubftanee has fallen, and grounded in 24 fathoms boats were drawn progreffively three whole days. At water, and fpired above the (urtace 50 feet f. Simr-f "lipps'k length a wind fprung up, the ice feparated (ufficiently lar icebergs are frequent in all the Arctic regions; and V°yug‘t to yield to the preffure of the (ull-lailtd (hips, whleh, to their lapfes is owing the folid mountainous ice whichP' after labouring againft the refifting.fields of tee, arrived in felts thofe feas. — Froit fports wonderfully with thefe on the 10th of Augult in the harbour of Smeeringberg, icebergs, and gives them majellic as well as other moft at the writ end of Spitzbergen. between it and Hack- lingular forms. Maffes have been feen affuming the luyt’s Headland. ftape of a Gothic church, with arched windows and The forms affumed by the ice in this chilling cli- doors, and all the rich drapery of that ftyle, compofed mate are extremely pleating to even the molt incu- of what an Arabian tale would fcarcely dare to relate, rious eye. The furface of that which is congealed of cryllal of the richeft fapphinne blue : tables with from the fea water (for we mult allow it two origins) one or more feet ; and often immenfe flat-roofed tem- is flat and even, hard, opake, refemblipg whi'.e fugar, pies, like thofe of Luxxor on the Nile, fupported by and incapable of being (lid on, like the Britirt ice. The round tranfparent columns of ccerulean hue, float by greater pieces, or fields, are many leagues in length : the altonifted fpedtator.—Thtfe icebergs are the crea- the leffer are the meadows of the teals on which thofe tion of ages, and receive annually additional height by animals at times frolic by hundreds. The motion of the falling of fnows and of rain, which often inttantly the hffer pieces is a« rapid as the currents: the greater, freezes, and more than repairs the lofs occafioned by which are f metimes 200 leagues long, and 60 or 80 the influence of the melting fun. broad, move flow and majtttiCally; often fix for a time, ICELAND, a large illand lying in the northern immoveable by the power of the ocean, and then pro- part of the Atlantic Ocean, between 63 and 68 de¬ duce near the lv r zan that bright white appearance cal- grees of north latitude, and betw een 10 and 26 degrees ledtheM’ni. The approximation of two great fields pm- of weft longitude, its greateft length being about 70O duces a moft. lingular phenomenon ; it forces the leffer miles, and its breadth 300. j (if the term can be applied to pieces of feveral acres This country lying partly within the frigid zone, and Genrral at. fqjare) out of the .vater, and adds them to their fur- being liable to be furrounded with vaft quantities of ice count of face : a fecond an often a third fucceeds ; fo that the which come from the polar feas, is on account of the1^ c0'®- whole forms an aggregate of a tremendous height, co’dnefs of its climate very inhofpitable ; but muchtr^* Thefe float in the lea like fo Inany rugged mountains, more fo for other reafons. It is exceedinely fubjett to and are fometimes 500 or 600 yards thick ; but the earthquakes ; and fo full of volcanoes, that the little far greater part is concealed beneath the water. Thefe part of it which appears fit for the habitation of man 3 feems Account ©f the cli- a nm- I C E [ ?7 ] . . ICE feems almoft totally laid wafte by them. The beft ac- tatojaii in height; and partly of field-ice, which is Iceland* count that hath yet appeared of the ifland of Iceland is neither fo thick nor fo much dreaded. Sometimes in a late publication intitled, “ Letters on Iceland, thefe enormous maffes are grounded in (hoal-water; and &c. written by Uno Von Troij, D. D. firtl chaplain in thefe cafes they remain for many months, nay years, to his Swedilh majefty.” This gentleman failed from undiflblved. chilling the atmofphere for a great way London on the 12th of July 1772, in company with round. When many fuch bulky and lofty ice-mafles are Mr Banks, Dr Solander, and Dr James Lind of E- floating together, the wood which is often found drift- dinburgh, in a fhip for which L. too Sterling was paid ing between them, is fo much chafed, and prefled with every month. After vifitingthe weftern ifles of Scot- fuch violence together, that it fometimes takes fire: land, they arrived on the 28th of Auguft at Iceland, which circumftance has occafioned fabulous accounts of where they call anchor at Befi’eftedr or Beffaftadr, ly- the ice being in flames. ing in about 64° 6' N. Lat. in the weftern part of the In 1753 and 1754, this ice occafioned fuch a vio- ifland. The country had to them the moft difmal ap- lent cold, that horfes and fheep dropped down dead by pearance that can be conceived. “ Imagine to your- reafon of it, as well as for want of food ; horfes were felf (fays Dr Troil) a country, which from one end obferved to feed upon dead cattle, and the ftieep eat of to the other prefents to your view only barren moun- each other’s wool. In 1755, towards the end of the tains, whofe fummits are covered with eternal fnow, month of May, the waters were frozen over in one and between them fields divided by vitrified cliffs, whole night to the thicknefs of an inch and five lines. In high and fharp points feem to vie with each other to 1756, on the 26th of June, fnow fell to the depth of deprive you of the fight of a little grafs which fcantily a yard, and continued falling through the months of fprings up among them. Thefe fame dreary rocks July and Auguft. In the year following it froze very like wife conceal the few fcattered habitations of the hard towards the end of May and beginning of June, natives, and no where a Angle tree appears which might in the fouth part of the ifland, which occafioned a afford flicker to friendfhip and innocence. The profpeft great fcarcity of grafs. Thefe frofts are generally fol- before us, though not pleafing, was uncommon and lowed by a famine, many examples of which are to be furprifing. Whatever prefented itfelf to our view bore found in the Icelandic chronicles. Befides thefe calami- the marks of devaftation ; and our eyes, accuftomed to ties, a number of bears annually arrive with the ica, behold the pleafing coafts of England, no faw nothing which commit great ravages among the fheep. The but the veftiges of the operation of a fire, Heaven Icelanders attempt to deftroy thefe intruders as foon as knows how ancient! they get fight of them. Sometimes they aflemble toge- The climate of Iceland, however, is not unwhole- ther, and drive them back to the ice, with which they ■ fome or naturally fubjeft to exceffive colds, notwith- often float off again. For want of fire-arms, they are Handing its northwardly fituation. I here have been obliged to ufe fpears on thefe occafions. The govern- inftances indeed of Fahrenheit’s thermometer finking ment alfo encourage the deftrudfion of thefe animals, to 240 below the freezing point in winter, and rifing to by paying a premium of 10 dollars for every bear that I04J in fummer. Since the year 1749, obfervations is killed, and purchafing the fkin of him who killed it. have been made on the weather ; and the refult of thefe Notwith Handing this difmal pidlure, however, taken obfervations hath been unfavourable, as the coldnefs of from Von Troll’s letters, fome tra&s of ground, in the climate is thought to be on the increafe, and of iig/t cultivation, are mentioned as being covered by the confequence the country is in danger of becoming un- great eruption of lava in 1783. It is poffible, there- fit for the habitation of the human race. Wood, which fore, that the above may have been fomewhat exag- formerly grew in great quantities all over the ifland, gerated. cannot now be raifed. Even the hardy firs of Norway Thunder and lightning are feldom heard in Iceland, cannot be reared in this ifland. They feemed indeed except in the neighbourhood of volcanoes. Aurora to thrive till they were about two feet high ; but then Borealis is very frequent and ftrong: It moft com- their tops withered, and they ceafed to grow. This monly appears in dry weather; though there are not is owing chiefly to the ftorms and hurricanes which wanting inftances of its being feen before or after rain, frequently happen in the months of May and June, and or even during the time of it. The lunar halo, which which are very unfavourable to vegetation of every prognofticates bad weather, is likewife very frequent kind. In 1772, governor Thodal fowed a little bar- here; as are alfo parhelions, which appear from one ley, which grew very brifkly ; but a ftiort time before to nine in number at a time. Thefe parhelions are ob¬ it was to be reaped, a violent ftorm fo effedtually de- ferved chiefly at the approach of the Greenland ice, ftroyed it, that only a few grains were found fcattered when an intenfe degree of froft is produced, and the about. Befides thefe violent winds, this ifland lies un- frozen vapours fill the air. Fire-balls, fometimes round der another difadvantage, owing to the floating ice al- and fometimes oval, are obferved, and a kind of Z£- ready mentioned, with which the coafts are often befet. nis fatuus which attaches itfelf to men and beafts ; and This ice comes on by degrees, always with an eafterly comets are alfo frequently mentioned in their ehro- wind, and frequently in fuch quantities as to fill up all nicies. This laft circumftance deferves the attention of the gulphs on the north-weft fide of the ifland, and aftronomers. even covers the fea as far as the eye can reach ; it alfo Iceland, befides all the inconveniencies already men- fometimes drives to other (bores. It generally comes in tioned, has two very terrible ones, called by the na- January, and goes away in March. Sometimes it only tivesJhrida and fniojlodi: the name of the firft imports- reaches the land in April; and, remaining there for a large pieces of a mountain tumbling down and deftroy- Ipng time, does an incredible deal of mifehief. It con- ing the lands and houfes which lie at the foot of it :; fills partly of mountains of ice, laid to be fometiaies Co this happened in 1554; when a whole farm was ruined, and. ICE [ 83 ] ICE and 13 people buried alive. The other word fignifies whatever nature has of beautiful and terrible, united Iceland. the effe&s of a prodigious quantity of fnow, which in one pifture, by delineating this furprifing pheno* covers the tops of the mountains, rolling down in im- ' menon. Reprefent to yourfelf a large field, where menfe malics, and doing a great' deal of damage : of you fee on one fide, at a great drftance, high moun- this there was an inilance in 1699, during the night, tains covered with ice, whofe fummits are generally wrapped in clouds, fo that their fharp and unequal points become invifible. This lofs, however, is cotti- -penfated by a certain wind, which caufes the clouds to 'fink, and cover the mountain itfelf when its fummit appears as it were to reft on the clouds. On the other the hot of which fpout up into the air to a furprifing height, fide Hecla is feen, with its three points covered with Knd°f AIlthejets d’eau which have been contrived with -fo ice, rifing above the clouds, and, with the fmokc which ygn much art, and at fuch an enormous expence, cannot afcends from it, forming other clouds at fome diilance ■r La- by any-means be compared with thefe wonders of na- from the real ones : and on another fide is a ridge of Account <5f when two farms were buried, with all their inhabitants and cattle. This laft accident Iceland has in common with all very mountainous countries, particularly Swit¬ zerland. Iceland abounds with hot and boiling fprings, fome tccwytvi. ture in Iceland. The water-works at Herenhaufcn high rocks, at the foot of which boiling water from throw up a fingle column of water of half a quarter of time to time iffues forth; and further on extends a a yard in circumference to a height of about 70 feet; thofe at the Winterkaften at Caffel throw it up, but in ,a much thinner column, <130 feet ; and the jet d’eau at St .Cloud, which is thought the greateft of all the Trench water-works, calls up a thin ‘column Bo feet into the air ; but fome fprings in Iceland pour marlh of about three Englilh miles in circumference, where are 40 or 50 boiling fprings, from which a va¬ pour afcends to a prodigious height.—In the midft of thefe is the greatell fpn'ng geyjtr, which deferves a more exa6l and particular account. In travelling to the place about an Englifh mile and an half from the -forth columns of water feveral feet in thicknefs to the hver, from which the ridge of rocks Hill divided us, we height of many fathoms ; and -many affirm of feveral -hundred feet. “ Thefe fprings are unequal in their degrees of heat; =but we have obferved none under 188 degrees of Fah¬ renheit’s thermometer; in fome it is 192, 193, 212, and in one fmall vein of water 213 degrees. From feme the water Hows gently, and the fpring is then heard a loud roaring noife, like the rufhing of a tor¬ rent precipitating itfelf from ftapendous rocks. We sliced our guide what it meant; he anfwered, it was geyfer roaring ; and we foon faw with our naked eyes what before feemed almolt incredible. “ The depth of the opening or pipe from which the water gullies cannot well be determined; for fome- JA particu- called laugy “ a bath;” from others it fpouts with a times the water funk down feveral fathoms, and fome great noife, and is then called Hues, or kit tel. It is feconds palled before a Hone which was thrown into very common for fome of thefe fpouting fprings to the aperture reached the furface of the water. The dole up, and others to appear in their Head. All opening itfelf was perfectly round, and 19 feet in dia- thefediot waters have an incrufting quality ; fo that we meter, and terminated in a bafon 59 feet in diameter, very commonly find the exterior furface from whence Both the pipe and the bafon were covered with a -.it burfts forth covered with a kind of rind, which al- rough llalaftic rind, which had been formed by the kinoft refembles.chafed work, and which we at firli took force of the water : the outermoft border of the bafon -for lime, but which was afterwards found by Mr Berg- is nine feet and an inch higher than the pipe itfelf. man to be of a filiceous or flinty nature. In fome pla- The water here fpouted feveral times a-day, but always ces the water taltes of fulphur, in others not; but by Harts, and after certain intervals. The people who when drank as foon as it is cold, taftes like common lived in the neighbourhood told us, that they rofe boiled water. The inhabitants ufe it at particular higher in cold and bad weather than at other times; times for dyeing; and were they to adopt proper re- and Egbert Olafsen and federal others affirm, that it has gulations, it might be of Hill greater ufe. Viduals fpouted to the height of 60 fathoms. Moll probably rnay alfo be boiled in it, and milk held over its Hearn they guefled only by the eye, and on that account their Becomes fwett; owing, moll probably, to the exceffive calculation may be a little extravagant; and indeed it heat of the water, as the fame effect is produced by boil- is to be doubted whether the water was ever thrown ing it a long time over the fire. They have begun to up fo high, though probably it fometimes mounts make fait by boiling fea-water over it, which when it is higher than when we obferved it. The method we refined, is very pure and good. The cows which drink took to obferve the height was as follows. Every one this hot water yield a great deal of milk. Egbert O- in company wrote down, at each time that the water Efsen relates, that the water does not become turbid fpouted, how high it appeared to him to be thrown, when alkali is thrown into it, nor does it change the and we afterwards chofe the medium. The firfi column colour of fyrup of violets. Horrebow afierts, that if marks the fpoutings of the water, in the order in you fill a bottle at one of the fpouting fprings, the which they followed one another; the fecond, the water will btXl over two or three times while the fpring time when thefe effufions happened; the third, the throws forth its water ; and if corked too foon, the height to which the water rofe; and the lad, how bottle will burfi. long each fpouting of water continued. ; Among the many hot fprings to be met with in dar deferip- Iceland, feveral bear the name of geyfer .*■ the follow- •oam°d0ne *n6’s a fiefeription of the moH remarkable of that 4^. name, and in the whole ifland. It is about two days journey from Hecla, near a farm called HaukaduL Here a poet would have an opportunity of painting N° 163. N° Time 1 At VI 42 m. 2 5, 3 VII 16 4 3I 5 Height 30 feet 6 6 Duration o 20 feconds o 20 69 '5 o 6 I N° Time ' 6—VIII. 17 7 29 ^ 36 C E t 89 1 ICE Height Deration from fix inches to otie foot in height, and they are fcelsnd. 24 o 30 then very regular, infomuch that they are fometimes w‘—/■**w 18 o 40 made ufe of for windows and door-pofts. In fome 12 0 4° places they only peep out here and there among the The pipe was now for the firft time full of water, which lava, or more frequently among the tufa ; in other ran flowly into the bafon. places they are quite overthrown, and pieces of broken 9 IX. zy 48 1 10 pillars only make their appearance. Sometimes they jo X. 16 24 1 co extend without interruption for two or three miles in “ At 35 minutes after twelve we heard as it were length. In one mountain they have a Angular ap- three difcharges of a gun under ground, which made pearance : on the top the pillars lie horizontally, in it (hake : the water flowed over immediately, but in- the middle they are floping ; the loweft are perfe&ly ftantly funk again. At eight minutes after two, the perpendicular; and in fome parts they are bent into a wrater flowed over the border of the bafon. At 15 mi- femicircular figure. The matter of the Iceland bafaltes nutes after three, we again heard feveral fubterranean feems to be the fame with that of Staffa; though in noifes, though not fo ftrong as before. At 43 mi- fome it is more porous, and inclines to a grey. Some mites after four, the water flowed over very ftrongly we obferved which were of a blackifh grey, and com- during the fpace of a minute. In fix minutes after, pofed of feveral joints. Another time we obferved a we heard many laud fubterraneous difcharges, not on- kind of porous glafly ftone, confequently a lava, which ly near the fpring, but alfo from the neighbouring was fo indiftinftly divided, that we were for fome time ridge of rocks where the water fpouted. At 51 mi- at a lofs to determine whether it was bafaltes or not, nutes after fix, the fountain fpouted up to the height though at lafl: we all agreed that it was.” of 92 feet, and continued to do fo for four minutes. Iron ore is found in fome parts of the ifland, and After this great effort, it funk down very low into the that beautiful copper ore called Malachites. Horrebow I- P*Pe> and was entirely quiet during feveral minutes; fpeaks of native filver. A ftratum of lulphur is found but foon began to bubble again: it was not, how- neariMy vatu from nine inches to two feet in thicknefs; ever, thrown up into the air, but only to the top of partly of a brown colour, and partly of a deep orange, the pipe. Immediately over the fulphur is a blue earth ; above “ The force of the vapours which throw up thefe that a vitriolic and aluminous one ; and beneath the ful- waters is exceflive ; it not only prevents the ftones phur a reddifh bole. ^ which are thrown into the opening from finking, but At what time the ifland of Iceland was firft peopled Hiftory o* even throws them up to a very great height, together is uncertain. An Englifli colony indeed is faid tothe iilan<3, with the water. When the bafon was full, wfe placed have been fettled there in the beginning of the fifth ourfelves before the fun in fuch a manner that wfe century ; but of this there are not fufficient proofs, could fee our fhadows in the water; when every one There is, however, reafon to fuppofe that the Englifh obferved round the fliadow of his own head (though and Irifli were acquainted with this country under not round that of the heads of others,) a circle of al- another name, long before the arrival of the Norwe- moft the fame colours which compofe the rainbow, and gians; for the celebrated Bede gives a pretty accurate round this another bright circle. This moft pr®- defcription of the ifland. But of thefe original inhabi- bably proceeded from the vapours exhaling from the tants we cannot pretend to fay any thing, as the Ice- water. land chronicles go no farther back than the arrival of “ Not far from this place, another fpring at the the Norwegians. What they relate is to the following foot of the neighbouring ridge of rocks fpouted water purpofe to the height of one or two yards each time. The Naddodr, a famous pirate, was driven on the coafl opening through which this water iffued was not fo of Iceland in 861, and named the country Snio-land^ wide as the other: we imagined it pofiible to flop up “ Snow-land,” on account of the great quantities of the hole entirely by throwing large itones into it, and fnow with which he perceived the mountains covered, even flattered ourfelves that our attempts had fuc- He did not remain there long ; but on his return ex¬ ceeded : but, to our aftonifliment, the water gufhed tolled the country to fuch a degree, that one GardeF forth in a very violent manner. We haftened to the Suafarfon, an enterprifing Swede, was encouraged by . pipe, and found all the ftones thrown afidc, and the his account to go in fearch of it in 864. He failed water playing freely through its former channel. In quite round the ifland, and gave it the name of Gar- thefe large fprings the waters were hot in the higheft dalJholmury or Carder’s-ifland. Having remained in degree, and tafted a little of fulphur ; but in other Iceland during the winter, he returned in the fpring to refpefts it was pure and clear. In the fmaller Norway, where he defcribed the new-difcovered ifland fprings of the neighbourhood the water was tainted: as a pleafant well-wooded country. This* excited a in fome, it was as muddy as that of a clay-pit: in defire in Floke, another Swede, reputed the greatell others, as white as milk; and in fome few, as red as navigator of his time, to undertake a voyage thither, i: blood. As the compafs was then unknown, he took three Account of <« Iceland abounds with pillars of bafaltes, which ravens on board to employ them on the difcovery. By piltars3 &cC t^ie ^ower ^ort People imagine have been piled upon the ivay he vifited his friends at Ferro ; and having ’ each other by the giants, who made ufe of fuperna- failed farther to the northward, he let fly one of his tural force to effeft it. They have generally from ravens, which returned to Ferro. Some time after, he three to feven fides; and are from four to fix feet in difmifled the fecond, which returned to the fliip again, thicknefs, and from t2 to 16 yards in length, without as he could find no land. The laft trial proved more any horizontal divifions. But fometimes they are only fuccefsful; the third raven took his flight to Iceland, j Vol. IX. Part. I. M where ICE [ 9© 1 ICE Iceland, where the (h!p arrived a few days after. Floke ftaid ""'■”V““nere the whole winter with his company; and, be- caufe he found a great deal of floating ice on the north fide, he gave the country the name of Iceland^ which it has ever fmce retained. When they returned to Norway in the following fpring, Floke, and thofe that had been with him, made a very different defcription of the country. Floke defcribed it as a wretched place ; while one of his com¬ panions, named Thorulfr, praifed it fo highly, that he affirmed butter dropped from every plant; which extravagant commendation procured him the name of 'Thorulfr-ftnior, or Butter-Thorulfr. From this time there are no accounts of any voyages to Iceland, till Ingolfr and his friend Leifr undertook one in 874. They fpent the winter on the ifland, and determined to fettle there for the future. Ingolfr returned to Norway, to provide whatever might be neceffary for the comfortable eftabliffiment of a colony, and Leifr in the mean time went to aflift in the war in England. After an interval of four years, they again met in Iceland, the one bringing with him a confiderable number of people, with the neceffary tools and inftruments for making the country habitable ; and the other imported his acquired treafures. After this period many people went there to fettle; and, in the fpace of 60 years, the whole ifland was inhabited. The tyranny of Harold king of Norway contributed not a little to the population of Iceland ; and fo great was the emigration of his fubje&s, that he was at laft obliged to iffue an order, that no one (hould fail from Norway to Iceland without paying four ounces of fine filver to the king. Befides the Norwegians, new colonies arrived from different nations, between whom wars foon commen¬ ced ; and the Icelandic hiftories are full of the accounts of their battles. To prevent thcfe confli&s for the future, a kind of chief was chofen in 928, upon whom great powers were conferred. This man was the fpeaker in all their public deliberations ; pronounced fentence in difficult and intricate cafes; decided all difputes ; and publiffied new laws, after they had been received and approved of by the people at large: but he had no power to make laws without the approbation and con- fent of the reft. He therefore affembled the chiefs, whenever the circumftances feemed to require it; and, after they had deliberated among themfelves, he repre- fented the opinion of the majority to the people, whofe affent was neceffary before it could be confidered as a law. His authority among the chiefs and leaders, however, was inconfiderable, as he was chofen by them, and retained his place no longer than while he prefer- ved their confidence. This inftitution did not prove fufScient to reftrain the turbulent fpirit of the Icelanders. They openly waged wav with each other; and, by their inteftine conflifts, fo weakened all parties, that the whole be¬ came at laft a prey to a few arbitrary and enterprifing men ; who, as is too generally the cafe, wantonly abufed their power to the oppreffion of their country¬ men, and the difgrace of humanity. Notwithftanding thefe troubles, however, the Icelanders remained free from a foreign yoke till 1261 ; when the greateft part of them put themfelves under the prote&ion of Hakans king of Norway, promifing to pay him tribu upon certain conditions agreed on between them; and the Iceland. reft followed their example in 1264. Afterwards,' Iceland, together with Norway, became fubjeft to Denmark. For a long time the care of the ifland was committed to a governor, who commonly went there once a-year ; though, according to his inftruc- tions, he ought to have refided in Iceland. As the coun¬ try fuffered incredibly through the abfence of its go¬ vernors, it was refolved a few years ago that they fhould refide there, and have their feat at Beffefftedr, one of the old royal domains. He has under him a bailiff, two laymen, a ftieriff, and 21 fyjfelmen, or ma- giftrates who fuperintend fmall diftri&s ; and almoft every thing is decided according to the laws of Den¬ mark. At the firft fettlement of the Norwegians in Iceland, Manners, • they lived in the fame manner as they had done in their &c. of the own country, namely, by war and piracy. Their Icelandci*‘ fituation with regard to the kings of Norway, however, foon obliged them to apply to other ftates, in order to learn as much of the knowledge of government and politics as was neceffary to preferve their colony from fubjugation to a foreign yoke. For this purpofe they often failed to Norway, Denmark, Sweden, England, and Scotland. The travellers, at their return, were obliged to give an account to their chiefs of the ftate of thofe kingdoms through which they paffed. For this reafon, hiftory, and what related to fcience, was held in high repute as long as the republican form of government lafted ; and the great number of hiftories to be met with in the country, ftiow at leaft the defire of the Icelanders to be inftrudled. To fecure them¬ felves, therefore, againft their powerful neighbours, they were obliged to enlarge their hiftorical knowledge. They likewife took great pains in ftudying perfeftly their own laws, for the maintenance and prote&ion of their internal fecurity. Thus Iceland, at a time when ignorance and obfcurity overwhelmed the reft of Europe, was enabled to produce a confiderable number of poets and hiftorians. When the Chnftian religion was introduced about the end of the 10th century, more were found converfant in the law than could have been expe&ed, confidering the extent of the country, and the number of its inhabitants. Filhing was fol¬ lowed among them ; but they devoted their attention, confiderably more to agriculture, which has fince en¬ tirely ceafed. Two things have principally contributed towards producing a great change both in their chara&er and way of life, viz. the progrefs of the Chriftian religion, and their fubje&ion firft to Norway, and afterwards to Denmark. For if religion, on one fide, commanded them to defift from' their ravages and warlike expedi¬ tions ; the fecular power, on the other, deprived them of the neceffary forces for the execution of them: and, fince this time, we find no farther traces of their heroic deeds, except thofe which are preferved in their hiftories. The modern Icelanders apply themfelves to fiftiing and breeding of cattle. They are middle-fized and well-made, though not very ftrong ; and the women are in general ill-featured. Vices are much lefs com¬ mon among them, than in other parts where luxury and riches have corrupted the morals of the people. Though their poverty difables them from imitating ICE [ 9 Iceland, the hofpltality of their anceftors in all refpe&s, yet they continue to (how their inclination to it: they cheerfully give away the little they have to fpare, and exprefs the utmoft joy and fatisfaftion if you are plea- fed with their gift. They are uncommonly obliging and faithful, and extremely attached to government. They are very zealous in their religion. An Icelander never palfes a river or any other dangerous place, with¬ out previoufly taking off his hat, and imploring the divine proteftion ; and he is always thankful for the prote&ion of the Deity when he has paffed the dan¬ ger in fafety. They have an inexpreffible attachment to their native country, and are nowhere fo happy. An Icelander therefore rarely fettles in Copenhagen, though ever fuch advantageous terms fhould be offered him. On the other hand, we cannot afcribe any great induttry or ingenuity to thefe people. They work on in the way to which they have all along been accuf- tomed, without thinking of improvements. They are not cheerful in converfation, but fimple and credulous ; and have no averfion againft a bottle, if they can find an opportunity. When they meet together, their chief paftime confifts in reading their hiftory. The mafter of the houfe makes the beginning, and the reft continue in their turns when he is tired. Some of them know thefe ftories by heart; others have them in print, and others in writing. Befides this, they are great players at chefs and cards, but only for their a- mufement, fince they never play for money : which, however, feems to have been formerly in ufe among them ; fince, by one of their old laws, a fine is im- 8 pofed upon thofe who play for money. Their drefs. The modern Icelanders have made very little alte¬ ration in their drefs from what was formerly in ufe. The men all wear a linen Ihirt next to the Ikin, with a fhort jacket, and a pair of wide breeches over it. When they travel, another fliort coat is put over all. The whole is made of coarfe black cloth, called ivad- mal; but fome wear clothes of a white colour. On their head they wear large three-cornered hats, and on their feet Iceland (hoes and worded {lockings. Some of them indeed have fhoes from Copenhagen ; but, as they are rather too dear for them, they generally make their own {hoes, fometimes of the hide of oxen, but more frequently of {beep's leather. They make them by cutting a fiquare piece of leather, rather wider than the length of the foot; this they few up at the toes and behind at the heel, and tie it on with leather thongs. Thefe {hoes are convenient enough where the country is level; but it would be very difficult for us who are not accuftomed to walk with them amongft the rocks and ftones, though the Icelanders do it with great eafe. The women are likewife dreffed in black wadmal. They wear a bodice over their (Tufts, which are fewed up at the bofom ; and above this a jacket laced be¬ fore with long narrow fleeves reaching down to the wrifts. In the opening on the fide of the fleeve, they have buttons of chafed filver, with a plate fixed to each button ; on which the lover, when he buys them in order to prefent them to his miftrefs, takes care to have his name engraved along with hers. At the top of the jacket a little black collar is fixed, of about three inches broad, of velvet or filk, and frequently trimmed with gold cord. The petticoat is likewife of i ] ICE wadmal, and reaches down to the ankles. Round the Iceland.. top of it is a girdle of filver or fome other metal, to u—v—^ which they fallen the apron, which is alfo of wadmal, and ornamented at top with buttons of chafed filver. Over all this they wear an upper-drefs nearly refem- bling that of the Swediffi peafants ; with this differ¬ ence, that it is wider at bottom : this is clofe at the neck and wrifts, and a hand’s-breadth ffiorter than the petticoat. It is adorned with a facing down to the bottom, which looks like cut velvet, and is generally wove by the Icelandic women. On their fingers they wear gold, filver, or brafs rings. Their head-drefs confifts of feveral cloths wrapped round the head al- moft as high again as the face. It is tied fall with a handkerchief, and ferves more for warmth than orna¬ ment. Girls are not allowed to wear this head-drefs till they are marriageable. At their weddings they are adorned in a very particular manner : the bride wears, clofe to the face, round her head-drefs, a crown of filver gilt. She has two chains round her neck, one of which hangs down very low before, and the other refts on her {boulders. Befides thefe, {he wears a leffer chain, from whence generally hangs a little heart, which may be opened to put fome kind of per¬ fume in it. This drefs is worn by all the Icelandic women without exception : only with this difference, that the poorer fort have it of coarfe wadmal, with ornaments of brafs; and thofe that are in caller cir- cumftances have it of broad cloth, with filver orna¬ ments gilt. The houfes of the Icelanders are very indifferent, fjoufel but the worft are faid to be on the fouth fide of the * ifland. In fome parts they are built of drift-wood, in others of lava, almoft in the fame manner as the ftone- walls we make for inclofures, with mofs Huffed be¬ tween the pieces of lava. In fome houfes the walls are wainfcotted on the infide. The roof is covered with fods, laid over rafting, or fometimes over the ribs of whales ; the walls are about three yards high, and the entrance fomewhat lower. Inftead of glafs, the win¬ dows are made of the chorion and amnios of ftieep, or the membranes which furround the womb of the ewe. Thefe are ftretched on a hoop, and laid over a hole in the roof. In the poorer fort of houfes they employ for the windows the inner membrane of the ftomach of animals, which is lefs tranfparent than the others. As the ifland of Iceland produces no kind of grain, the inhabitants of confequence have no bread but what is imported ; and which being too dear for common ufe, is referved for weddings and other entertainments. The following lift of their viands is taken from Troil’s Letters. (( I. Flour of Jtalgras, (lichen iflandicus, or rock- grafs. The plant is firft walhed, and then cut into fmall pieces by fome ; though the greater number dry it by fire or in the fun, then put it into a bag in which it is well beaten, and laftly work it into a flour by {lamping. “ 2. Flour of komfyrg, (polygonum biftorta), is prepared in the fame manner, as well as the two other forts of wild corn melur (Arundo arenana, and Arundo foliorum lateribus convolutis), by feparating it from the chaff, pounding, and laftly grinding it. “ 3- Surt fmoer, (four butter). The Icelanders feidom make ufe of frelh or fait butter, but let it grow M 2 four ICE [ 92 1 ICE four before they eat it. In this manner it may be On the eoafts the men employ themfelves in ftfli- Iceland* kept for 20 years, or even longer ; and the Icelanders ing, both fummer and winter. On their return home, * look upon it as more wholefome and palatable than the when they have drawn and cleaned their fifh, they give i» butter ufed among other nations. It is reckoned bet- them to their wives, whole care it is to dry them. InEmPloy‘ ter the older it grows; and one pound of it then is va- the winter, when the inclemency of the weather pre- lued as much as two of freih butter. vents them from fifhing, they are obliged to take care &c. “ 3. String, or whey boiled to the confidence of of their cattle, and fpin wool. In fummer, they mow four milk, and preferved for the winter. the grafs, dig turf, provide fuel, go in fearch of !heep “ 4. Filh of all kinds, both dried in the fun and and goats that were gone aftray, and kill cattle. They, in the air, and either faked or frozen. Thofe prepared prepare leather with the fpiraca ulmaria indead of in the lad manner are preferred by many. bark. Some few work in gold and diver ; and others “ 5. The flefli of bears, dieep, and birds, which are indrudled in mechanics, in which they are tolerable is partly failed, partly hung or fmoked, and feme prodcients. The women prepare the it with an horrid noife, which ""“v 4 continued till the year 1730. “ The mountains of Iceland (fays Mr Pennant) are of two kinds, primitive and polierior. The former confill of llrata ufually regular, but fometimes confu- fed. They are formed of different forts of Hone without the lead appearance of fire. Some are compofed of fand and free done, petrofilex or chirt, flaty or fiflile done, and various kinds of earth or bole, and deaths ; different forts of breccia or conglutinated dones ; jaf- pers of different kinds, Iceland crydal; the common rhomboid fpathum, chalcedonies dratified, and botryoid? zeolites of the mod elegant kinds ; crydals, and va¬ rious other fubilances that have no relation to vol¬ canoes. Thefe primitive mountains are thofe called Jokuls. and are higher than the others. One of them, called JEfian or Rias, is 6000 feet high. It feems to be compofed of great and irregular rocks of a dark grey colour, piled on each other. Another, called Enneberg, is about 3000 feet high; the Snafeld Jokul, 2287 yards; the SnajiAdnas xsx promontory of Snafield is from 300 to 400 fathoms- Hornjlrand or the coad by the north Cape Nord is very high, from 300 to 400 fathoms. The rocks of Drango are feven in number, of a pyramidal figure, rifing out of the fea at a fmall didance from the cliffs, four of which are of a • vad height, and have a mod magnificent appearance. “ Eadward from the Stiafield begins the Eifberge, foaring to a vad height; many parts of which have felt the effedls of fire, and in fome of the melted rocks are large cavities. Budda-kkhur, a rock at one end of this mountain, is alfo volcanic, and has in it a great cavern hung withJlalattita. The name of Solvahamar is given to a tremendous range of volcanic rocks, com¬ pofed entirely of flags, and covered in the feafon with fea-fowl. It would be endlefs, however, to mention all the places which bear the marks of fire in various - forms, either by having been vitrified, changed into a fiery colour, ragged and black, or bear the marks of having run for miles in a doping courfe towards the fea.” Thefe volcanoes, though fo dreadful in their effe&s, feldom begin to throw out fire without giving warning. A fubterraneous rumbling noife heard at a confider- able didance, as in other volcanoes, precedes the erup¬ tion for fevefal days, with a roaring and cracking in the place from whence the fire is about to burd forth ^ many fiery meteors are obferved, but generally unat¬ tended with any violent concuflion of the earth, though fometimes earthquakes, of which feveral in- dances are recorded, have accompanied thefe dreadful conflagrations. The drying up of fmall lakes, dreams, and rivulets, is alfo confidered as a fign of an impend¬ ing eruption ; and it is thought to haden the eruption when a mountain is fo covered with ice, that the holes are dapped up through which the exhalations former¬ ly found a free paffage, The immediate fign is the burding of the mafs of ice with a dreadful naife ; flames then iffue forth from the earth, and lightning and fireballs from-the fmoke; dones, allies, &c. are thrown out to vad didances. Egbert Olaflsen relates, that, in an eruption of Kattle giaa in 1755, a done weighing 290 pounds was thrown to the didance of 24 Englifii miles. A quantity of white pumice done is 4. thrown.'. ICE [ 94 1 ICE Iceland, thrown up by the boiling waters ; and it is conjeftured 1 with great probability, that the latter proceeds from the fea, as a quantity of fait, fufficient to load feveral horfes, has frequently been found after the mountain has ceafed to burn. To enumerate the ravages of fo many dreadful volcanoes, which from time immemorial have contri¬ buted to render this dreary country ftill lefs habitable 1$ than it is from the climate, would greatly exceed our tP^alnroft he fufficient to give an account of that defolated which happened in 1783, and which from its violence by an erup-fecms to have been unparalleled in hiftory. jtion in Its hrft ligns were obferved on the ill of June by a trembling of the earth in the weftern part of the province of Shapterfiall. It increafed gradually to the 1 ith, and became at laft fo great that the inhabitants quitted their houfes, and lay at night in tents on the ground. A continual fmoke or tteam was perceived rifing out of the earth in the northern and un¬ inhabited parts of the country. Three jire-fpouts, as they were called, broke out in different places, one in Ulfarfdal, a little to the call of the river Skapta; the other two were a little to the weftward of the river called Iliverjisjliot. The river Skapta takes its rife in the northeall, and running firft weftward, it turns to the fouth, and falls into the fea in a foutheaft diredlion. Part of its channel is confined for about 24 Englifh miles in length, and is in fome places 200 fathoms deep, in others 100 or 150, and its breadth in fome places 100,50, or 40 fathoms. Along the whole of this part of its courfe the river is very rapid, though there are no confiderable catara&s or falls. There are feve¬ ral other fuch confined channels in the country, but this is the moft confiderable. The three fire-fpouts, or ftreams of lava, which bad broke out, united into one, after having rifen a confiderable height into the air, arriving at laft at fuch an amazing altitude as to be feen at the diftance of more than 200 Englifh miles; the whole country, for double that diftance, being covered with a fmoke or fleam not to be defcribed. On the 8th of June this fire firft became vifible. Vaft quantities of fand, afhes, and other volcanic matters were eje&ed, and fcattered over the country by the wind, which at that time was very high. The atmofphere was filled with fand, brimftone, and afhes, in fu;h a manner as to occaiion continual darknefs ; and confiderable damage was done by the pumice ftones which fell, red hot, in great quantities. Along with thefe a tenacious fubttance like pitch fell in vaft quantity ; fometimes rolled up like balls, at other times like rings or garlands, which proved no lefs deftruclive to vegetation than the other. This fhower having continued for three days, the fire became very vifible, and at laft arrived at the amazing height already mentioned. Sometimes it appeared in a continued ftream, at others in fiafhes or flames feen at the dif¬ tance of 30 or 40 Danifh miles (180 or 24c of ours), with a continual noife like thunder, which lafted the whole fummer. The fame day that the fire broke out there fell a vaft quantity of rain, which running in ftreams on the hot ground tore it up in large quantities, and brought it down upon the lower lands. This rain-water was much impregnated with acid and other falts, fo as to be highly corrofive, and occafion a painful fenfation when Iceland, it fell on the hands or face. At a greater diftance from i——y—« the fire the air was exceffively cold. Snow lay upon the ground three feet deep in fome places; and in others there fell great quantities of hail, which did very much damage to the cattle and every thing with¬ out doors. Thus the grafs and every kind of vege¬ tation in thofe places neareft the fire was deftroyed, being covered with a thick cruft of fulphureous and footy matter. Such a quantity of vapour was railed by the conteft of the two adverfe elements, that the fun was darkened and appeared like blood, the whole face of nature feeming to be changed; and this ob- feurity feems to have reached as far as the ifland of Britain; for during the whole fummer of 1783, an obfeurity reigned throughout all parts of this ifland ; the atmofphere appearing to be covered with a con¬ tinual haze, which prevented the fun from appearing with his ufual fplendor. The dreadful feene above defcribed lafted in Iceland for feveral days; the whole country was laid wafte, and the inhabitants fled every where to the remoteft parts of their miferable country, to feck for fafety from the fury of this unparalleled tempeft. On the firft breaking out of the fire, the river Skapta was confiderably augmented, on the eaft fide of which one of the fire fpouts was fituated ; and a fi- milar overflow of water was obferved at the fame time in the great river Piorfa, which runs into the fea a little to the eaftward of a town called Orrebakka, and into which another river called Tuna, after having run through a large tra£l of barren and uncultivated land, empties itfelf. But on the 1 ith of June the waters of the Skapta were leflened, and in lefs than 24 hours totally dried up. The day following, a prodigious ftream of liquid and red-hot lava, which the fire-fpout had difeharged, ran down the channel of the river. This burning torrent not only filled up the deep chan¬ nel above mentioned, but, overflowing the banks of it, fpread itfelf over the whole valley, covering all the low grounds in its neighbourhood ; and not ha¬ ving any fufficient outlet to empty itfelf by, it rofe to a vaft height, fo that the whole adjacent country was overflowed, infinuating itfelf between the hills, and covering fome of the lower ones. The hills here are not continued in a long chain or feries, but are fepara- ted from one another, and detached, and between them run little rivulets or brooks ; fo that, befides filling up the whole valley in which the river Skapta ran, the fiery ftream fpread itfelf for a confiderable diftance on each fide, getting vent between the above mentioned hills, and laying all the neighbouring coun¬ try under fire. The fpouts ftill continuing to fupply frefh quanti¬ ties of inflamed matter, the lava took its courfe up the channel of the river, overflowing all the grounds above, as it had done thofe below the place whence it iffued. The river was dried up before it, until at laft; it was Hopped by the hill whence the Skapta takes its rife. Finding now no proper outlet, it rofe to a prodigious height, and overflowed the village of Buland, confu- ming the houfes, church, and every thing that Hood in its way ; though the high ground on which this village flood feemed to enfure it from any danger of this kind. The ICE [ The fiery lake Hill increafing, fpread itfelf out in 'length and breadth for about 36 Englifli miles ; and having converted all this traft of land into a fea of fire, it ftretched itfelf towards the fouth, and getting vent again by the river Skapta rulhed down its channel with great impetuofity. It was ftill confined be¬ tween the narrow banks of that river for about fix miles (Englifli); but coming at laft into a more open place, it poured forth in prodigious torrents with amazing velocity and force ; fpreading itfelf now to¬ wards the fouth, tearing up the earth, and carrying on its furface flaming woods and whatfoever it met with. In its courfe it laid wafte another large diftrift of land. The ground where it came was cracked, and fent forth great quantities of fleam long before the fire reached it ; and every thing near the lake was either burnt up or reduced to a fluid ftate. In this fituation matters remained from the 12th of June to the 1 3th of Auguft ; after which the fiery lake no longer fpread itfelf, but neverthelefs continued to burn ; and when any part of the furface acquired a cruft by cooling, it was quickly broken by the fire from below; and this tumbling down among the melted fubftance, was rolled and tofled about with prodigious noife and crackling ; and in many parts of its furface, fmall fpouts or at leaft ebullitions were formed, which con¬ tinued for fome length of time. In other dire&ions this dreadful inundation proved no lefs deftruftive. Having run through the narrow part of the channel of Skapta as early as the 12th of June, it ftretched out itfelf towards the weft and fouth- weft, overflowing all the flat country, and its edge being no lefs than 70 fathoms high at the time it got out of the channel of the river. Continuing its de- ftru&ive courfe, it overflowed a number of villages, running in every diredtion where it could find a vent. In one place it came to a great cataraft of the river Skapta, about 14 fathoms in height, over which it was precipitated with tremendous noife, and thrown in great quantities to a very confiderable diftance. In a- nother place it flopped up the channel of a large river, filled a great valley, and deftroying two villages by approaching only within too fathoms of them. Others were overflowed by inundations of water proceeding from the rivers which had been flopped in their cour- fes; until at laft all the paffages on the fouth, eaft, and weft, being flopped, and the fpouts ftill fending up incredible quantities of frefli lava, it burft out to the north and northeaft, fpreading over a tract of land 48 miles long and 36 broad. Here it dried up the rivers Tuna and Axafyrdi; but even this vaft effufion being infufficient to exhauft the fubterraneous refources of liquid fire, a new branch took its courfe for about eight miles down the channel of the river Ilwerfisfliot, when coming again to an open country, it formed what our author calls afmall lake of fire, about twelve miles in length and fix in breadth. At laft, however, this branch alfo flopped on the 16th of Auguft ; the fiery fountains ceafed to pour for thnew fupplies, and this moft aftonilhing eruption came to a period. The whole extent of ground covered by this dread¬ ful inundation was computed at no lefs than 90 miles long and 42 in breadth; the depth of the lava being from 16 to 20 fathoms. Twelve rivers were driedup,20 cr 3i villages were deftroyed, and 224 people loft 95 1 I C E their lives. The extent above mentioned, however, is that only on the fouth, eaft, and weft; for that towards the north being over uninhabited land, where no body cared to venture themfelves, was not exactly known. Some hills.were covered by this lava; others were melted down by its heat; fo that the whole had the appearance of a fea of red-hot and melted metal. After this eruption two new iflands were thrown up^ from the bottom of the fea. One, about three miles in circumference, and about a mile in height, made its appearance in the month of February 1784, where there was formerly 100 fathoms water. It was about 100 miles fouthweft from Iceland, and 48 from a cluf- ter of fmall iflands called Gierfugla. It continued for fome time to burn with great violence, fending forth prodigious quantities of pumice ftones, fand, See. like other volcanoes. The other lay to the northweft, be¬ tween Iceland and Greenland. It burnt day and night without intermiflion for a confiderable time ; and was alfo very high, and larger than the former. Since that time, however, one or both of thefe iflands have been fwallowed up. All the time of this great eruption, and for a con¬ fiderable time after, the whole atmofphere was loaded with fmoke, fleam, and fulphureous vapours. The fun was fometimes wholly invifible; and when it could be feen was of a reddifli colour. Moft of the fifhe- ries were deftroyed; the banks where the fifh ufed to refort being fo changed, that the fifhermen could not know them again ; and the finoke was fo thick, that they could not go far out to fea. The rain water, falling through this fmoke and fleam, was fo impreg¬ nated with fait and fulpbureous matter, that the hair and even the fltin of the cattle were deftroyed ; and the whole grafs of the ifland was fo covered with foot and pitchy matter, that what had efcaped the deftrudive effeds of the fire became poifonous ; fo that the cattle died for want of food, or perilhed by eating thofe- unwholefome vegetables. Nor were the inhabitants in a much better fituation ; many of them having loft their lives by the poifonous qualities of the fmoke and fteam with which the whole atmofphere was filled; particularly old people, and fuch as had any complaint in the bread and lungs. Before the fire broke out in Iceland, there is faid to have been a very remarkable eruption in the uninha¬ bited parts of Greenland ; and that in the northern parts of Norway, oppofite to Greenland, the fire was vifible for a long time. It was alfo related, that when the wind was in the north, a great quantity of aftres, pumice, and brimftone, fell upon the north and weft coafts of Iceland, which continued for the whole fumr mer whenever the wind was in that quarter; and the air was always very much impregnated with a thick fmoke and fulphureous fmell. During the fall of the (harp rain formerly mention¬ ed, there was obferved at Trondheim, and other places in Norway, and likewife at Faw, an uncommon fall of ftiarp and fait rain, which totally deftroyed the leaves of the trees, and every vegetable it fell upon, by fcorching them up, and caufing them to wither. A. confiderable quantity of allies, fand, and other volcanic matters, fell at Faro, which covered the whole furfaca of the ground whenever the wind blew from Iceland^ though the diftance between the two places is not lefs ICE [96 lefs than 480 miles. Ships that were failing betwixt I C H 16 Vhorke- lyn's ac¬ count of the an¬ cient ftate of this lifland. , . u By the laws of Iceland, the poor were committed 'IcelatnJ |i Copenhagen and Norway were frequently covered to the prote&ion of their neared kindred, who had a, - ^ 1 with afhes and fulphureous matter, which ftuck to the right to their labour as far as they were able to work, ,c eumon mafts, fails, and decks, befmearing them all over with and afterwards to indemnification if the poor perfon a black and pitchy fubftance. In many parts of fhould acquire any property. Children were obliged Holland, Germany, and other northern countries, a to maintain their parents in their old age; but if the fulphureous vapour was obferved in the air, accom- latter had neglefted to give them good education, they panied with a thick fmoke, and in fome places a light were abfolved from this duty, grey-coloured fubftance fell upon the earth every While the republic of Iceland continued free and \ night; which, by yielding a bluifti flame when thrown independent, {hips were fent from the ifland to all parts into the fire, evidently {bowed its fulphureous nature, of the world. Till very lately, however, not a {hip On thofe nights in which this fubftance fell in any belonged to it, the little commerce it enjoyed being quantity, there was little or no dew obferved. Thefe monopolized by a Danifli company, until in 1786 it appearances continued, more or lefs, all the months of was laid open to all the fubje&s of Denmark. “ There July, Auguft, and September. is at prefent (fays Mr Pennant *) a revival of the cod ' ' Some curious particulars relative to the ancient ftate fifhery on the coaft of Iceland from our kingdom. A-t0 Ar£i•• Jj of this ifland have lately been publiftied by a Mr bout a dozen of veffels have of late failed from the ifl-fj Vhorkelyn, a native of the country. From his work of Thanet, and a few from other parts of Great Bri- it appears that Iceland, for a very confiderable fpace of tain. They are either {loops or brigs from 50 to 80 time, W*. from the beginning of the 10th to the tons burden. A lugfail boat, fuch as is ufed in the middle of the 13th century, was under a republican herring-filhery, failed laft feafon from Yarmouth thus I form of government. At firft the father, or head of equipped. The crew confifted of five men from the every family, was an abfolute fovereign ; but in the town, and five more taken in at the Orkneys. They had progrefs of population and improvement, it became ne- twelve lines of 120 fathoms each,and 200 orjoo hooks; ceffary to form certain regulations for the fettlement of fix heading knives, twelve gutting and twelve fplitting difputes concerning the frontiers of different eftates. knives. They take in x 8 tons of fait at Leith, at the For this purpofe the heads of the families concerned af- rate of three tons to every thoufand fifh ; of which fembled themfelves, and formed the outlines of a re- fix or feven thoufand is a load for a veffel of this kind, public. In the mean time they carried on a profpe- They go to fea about the middle of April; return by X'ous trade to different parts ; fending {hips even to the the Orkneys to land the men ; and get into their port Levant, and to Conftantinople, at that time celebra- in the latter end of Auguft or beginning of Septem- ted as the only feat of literature and humanity in the her. Pytheas fays, that Iceland lies fix days failing world. Deputies were likewife fent from this ifland from Great Britain. A veffel from Yarmouth was, in over land to that capital, for the improvement of their the laft year, exa&ly that time in its voyage from the laws and civilization ; and this a whole century before Orkneys to Iceland. With a fair wind it might be the firft crufade. In thefe ancient Icelandic laws, there- performed in far lefs time ; but the winds about the fore, we meet with evident traces of thofe of the Greeks Ferroe ifles are generally changeable.” and Romans. For example, befides a body of written Iceland Jlgate ; a kind of precious ftone met with laws which were written every third year to the people, in the iflands of Iceland and Afcenfion, employed they had two then chofen annually by the heads of fa- by the jewellers as an agate, though too foft for the milies, with confular power, not only to enforce the purpofe. Ic is fuppofed to be a volcanic produft; laws then in being, but when thefe proved deficient, to being folid, black, and of a glaffy texture. When aft as neceflity required. held between the eye and the light, it is femitranfpa- Thefe laws do not appear to have inflifted capital rent and greenifh like the glafs bottles which con- puniftiments upon any perfon. Murderers were banifh- tain much iron. In the iflands which produce it, ed to the wood; that is, to the interior and uncultiva- fuch large pieces are met with that they cannot be ted parts of the ifland ; where no perfon was allowed equalled in any glafs-houfe. to approach them within a certain number of fathoms. Iceland (or IJland) Cryjlal. See Crystal [Ice- In cafes of baniflrment for leffer crimes, the friends of land). the offender were allowed to fupply him with neceffa- ICENI, the ancient name of the people of Suffolk, ries. The culprit, however, might be killed by any Norfolk, Cambridgeflure, and Huntingdonfliire, in perfon who found him without his bounds ; and he England. might even be hunted and deftroyed in his fanftuary, ICH-dien. See Heraldry, chap. iv. feft. 2. provided he did not withdraw himfelf from the ifland ICHNEUMON in zoology. See Viverra. within a twelvemonth after his fentence, which it was Ichneumon, is alfo the name of a genus of flies of fuppofed he might accomplifli by means of the annual the hymenoptera order. The mouth is armed with arrival and departure of fhips. Every man’s perfon jaws, without any tongue; the antennae have above was free until he had forfeited his rights by fome crime 30 joints; the abdomen is generally petiolated, join- againft fociety; and fo great was their refpeft for in- ed to the body by a pedicle or ftalk ; the tail is armed dependence, that great indulgence was allowed for the with a fting, which is inclofed in a double-valved cylin- power of pafiion. If any provoking word or beha- drical {heath ; the wings are lanceolated and plain, viour had been ufed, no punifliment’ was inflifted on This genus is exceedingly numerous. In Gmdin’a the party who refented it, even though he fliould have or the 13th edit, of the Syjlema Natura, no fewer than killed his adverfary. 415 fpecies are enumerated. They are divided into N0 163. • fa- I C H [ union, families, from the colour of their fcutellum and an- rf’—-'' tennas, as follow : i. Thofe with a whitiih fcutcheort, and antennae annulated with a whitilh band. 2. Thofe which have a white efcutcheon, and antennae entirely black. 3. With a fcutcheon of the fame colour as the thorax; the antenna; encompaffed with a fillet* 4. With a fcutcheon of the fame colour as the thorax; and antennae black and fetaceous. 5. With fetaceous clay-coloured antennae. 6. With fmall filiform an¬ tennae, and the abdomen oval and flender. One diftinguilhing and ftriking charafter of thefe fptcies of flies is the almoft continual agitation of their antennae. The name of Ichneumon has been ap¬ plied to them, from the fervice they do us by deftroy- ing caterpillars, plant-lice, and other infetts; as the ichneumon ormangoufte dettroys the crocodiles. The variety to be found in the fpecies of ichneumons is prodigious : among the fmaller fpecies there are males who perform their amorous preludes in the moft paf- fionate and gallant manner. The pofterior part of the females is armed with a wimble, vifible in fome fpe¬ cies, no ways difcoverable in others; and that inftru- ment, though fo fine, is able to penetrate through mor¬ tar and plafter: the ftru&ure of it is more eafily feen in the long-wimbled fly. The food of the family to be produced by this fly is the larva of wafps or mafon- bees: for it no fooner efpies one of thofe nefts, but it fixes on it with its wimble, and bores through the mortar of which it is built. The wimble itfelf, of an admirable ftrudture, confifts of three pieces ; two col¬ lateral ones, hollowed out into a gutter, ferve as a {heath, and contain a compaft, folid, dentated ftem, along which runs a groove that conveys the egg from the animal, who fupports the wimble with its hinder legs, left it ftiould break, and by a variety of move¬ ments, which it dexteroufly performs, it bores through the building, and depofits one or more eggs, according to the fize of the ichneumon, though the largeft drop but one or two. Some agglutinate their eggs upon caterpillars ; others penetrate through the caterpillar’s eggs, though very hard, and depofit their own in the infide. When the larva is hatched, its head is fo fi- tuated, that it pierces the caterpillar, and penetrates to its very entrails. Thefe larvae pump out the. nutritious juices ot the caterpillar, without attacking the vitals of the creature ; who appears healthy, and even fome- times transforms itfelf to a chryfalis. It is not un¬ common to fee thofe caterpillars fixed upon trees, as if they were fitting upon their eggs, and it is after¬ wards difcovered that the larva:, which were within their bodies, have fpun their threads, with which, as with cords, the caterpillars are faftened down, and fo perifh miferably. The ichneumons performed fpecial fervice, in the years 1731 and 1732 ; by multiplying in the fame proportion as did the caterpillars, their larvae deftroyed more of them than could be effedted by human induftry. Thofe larvae, when on the point of turning into chryfalids, fpin a filky cod. Nothing is more furprifing and Angular, than to fee thofe cods leap when placed on the table or hand. Plant-lice, the larvae of the curculiones, and fpider’s eggs, are al- fo fometimes the cradle of the ichneumon-fly. Car- cafes of plant-lice, void of motion, are often found on rofe-tree leaves; they are the habitation of a fmall larva, which, after having eaten up the entrails, de- Vo n. IX. Part I. 97 1 1 C H ftroys the fprings and inward economy of the plant- Iehnog*a- loufe, performs its metamorphofis under ftrelter of the pellicle which enfolds it, contrives itfelf a fmall cir- ichthyo- cular outlet, and fallies forth into open air. There colla. are ichneumons in the woods, who dare attack fpiders,—v ■ run them through with their fting, tear them to pieces, and thus avenge the whole nation of flies of fo formi¬ dable a foe : others, deftitute of wings (and thofe are females), depofit their eggs in fpiderg nefts. The ich¬ neumon of the bedeguar, or fweet-briar fponge, and that of the rofe-tree, perhaps only depofit their eggs in thofe places, becaufe they find other infefts on which they feed. The genus of the ichneumon-flies might with propriety be termed a race of diminutive canibals. ICHNOGRAPHY, in perfpeftive, the view of any thing cut off by a plane, parallel to the horizon, juft at the bafe of it.—The word is derived from the Greek footflep, and Jpap® I write, as being a defcription of the footfteps or traces of a work. Among painters it fignifies a defcription of images or of ancient ftatues of marble and copper, of buds and femi-bufts, of paintings in frefco, mofaic works, and ancient pieces of miniature. ICHOGLANS, the grand fignior’s pages ferving in the feraglio. Thefe arc the children of Chriftian parents, either taken in war, purchafed, or fent in prefents from the viceroys and governors of diftant provinces ; they are the moft fprightly, beautiful, and well-made that can be met with ; and are always re¬ viewed and approved of by the grand fignior himfelf before they are admitted into the feraglios of Pera, Conftantinople, or Adrianople, being the three col¬ leges where they are educated, or fitted for employ¬ ments, according to the opinion the court entertains of them. ICHOR, properly fignifies a thin watery humour like ferum ; but is fometimes ufed for a thicker kind flowing from ulcers, called alfa fanies. ICHTHYOCOLLA, Isinglass, a preparation from the fifti known by the name of hufo. See Accipenser. The word is Greek, formed of «XSu< fijhy ar.d *o\Aa glue.—The method of making Ifinglafs was long a fecret in the hands of the Ruf¬ fians; but hath lately been difcovered, and the following account of it publifhed by Humphrey Jackfon, Efq; in the 63d volume of the Philofophical Tranfa&ions. “ All authors who have hitherto delivered pro- ceflTes for making ichthyocolla, fifti-glue, or ifinglafs, have greatly miftaken both its conftftuent matter and preparation. “ To prove this aflertion, it may not be improper to recite what Pomet fays upon the fubje&, as he ap¬ pears to be the principal author whom the reft have co¬ pied. After deferibing the fifti, and referring to a cut engraved from an original in his cuftody, he fays; ‘ As to the manner of making the ifinglafs, the finewy parts of the fifti are boiled in water till all of them be diflblved that will diflblve ; then the gluey liquor is drained, and fet to cool. Being cold, the fat is care¬ fully raken off, and the liquor itfelf boiled to a juft confiftency, then cut to pieces, and made into a twill, bent in form of a crefcent, as commonly fold; then hung upon a firing, and carefully dried.’ “ Prom this account, it might be rationally eon- N eluded, I C H C 98 ] I C H Ichthyo- eluded, that every fpecies of firti which contained ge- fpecifie gravity, arranged themfelves accordingly, and tAthy*. col|^ i latinoue principles would yield ifinglafs: and this pa- fell in a combined ftate to the bottom, through the ^ rity of reafoning feems to have given rife to the halty well-known laws of gravitation ; for, in this cafe, ' v conclufions of thofe who ftfenuoudy vouch for the there is no eleftivefattradlion, as fonae have imagined, extraction of ifinglafs from fturgeon ; but as that fifti which bears the leaft affinity with what frequently oc- is eaiily procurable, the negligence of afeertaining the curs in chemical decompofitions. fact by experiment feems inexcufable. “ If what is commercially termed Jong or/iortjtap/ed “ In my iirft attempt to difeover the conftituent ifinglafs be fteeped a few hours in fair cold water, the parts and manufacture of ifinglafs, relying too much entwilted membranes will expand, and reaffirme their upon the authoTity of fonae chemical authors whofe original beautiful (n) hue, and, by a dexterous addrefs, veracity I had experienced in many other inftanees, may be perfectly unfolded. By this fimple operation, I found myfelf conftantly difappointed. Glue, not we find that ifinglafs is nothing more than certain ifinglafs, was the refult of every procefs ; and al- membrahous parts of fiihes, divefted of their native mu- though, in the fame view, a journey to Ruffia proved cofity, tolled and twilled into the forms above meution- fruidefs, yet>a Heady prefeverance in the refearch ed, and dried in open air. proved not only fuccefsful as to this objeCl, but, in “ The founds, or air-bladders, of frdh water fiili the purfuit, to difeover a refinous matter plentifully in general, are preferred for this purpofe, as being procurable in the Britifh filheries, which has been the moil tranfparent, flexible, delicate fubftances. found by ample experience to anfwer fimilar purpofes. Thtfe conftitute the fined forts of ifinglafs; thofe It is now no longer a fecret, that our (a) lakes and called book and ordinary jiaple, are made of the intef- rivera in North America are Hocked with immenfe tines, and probably of the peritonaeum of the filh. quantities of filh, faid to be the fame fpecies with The belluga yields the greatefi quantity, as being the thoft in Mufcovy, and yielding the finefi ifinglafs} the largeH and moH plentiful filh in the Mufcovy rivers; but filheries whereof, under due encouragement, would the founds of all frelh-water fifh yield, more or lefs, doubtlefs fupply all Europe with this valuable article. fine ifinglafs, particularly the fmaller forts, found in “ No artificial heat is neceffary to the production prodigious quantities in the Cafpian Sea, and feveral of ifinglafs, neither is the matter diflblved for this hundred miles beyond AHracan, in the Wolga, Yaik, purpofe ; for, as the continuity of its fibres would be Don, and even as far as Siberia, where it is called kle or deHroyed by folution, the mafs would become brittle kla by the natives, which implies a glutinous matter * in drying, and fnap Ihort afunder, which is always it is the bafis of the Ruffian glue, which is preferred to the cafe with glue, but never with ifinglafs. The all other kinds for its Hrength. latter, indeed, may be refolved into glue with boil- “ The founds, which yield the finer ifinglafs, confift ing water; but its fibrous recompofition would be of parallel fibres, and are eafily rent longitudinally ; found imprafticable afterwards, and a fibrous texture but the ordinary forts are found compofed of double is one of the moH diHinguilhing charafterifiics of ge- membranes, whofe fibres crofs each other obliquely, re- auine ifinglafs. fembling the coats of a bladder : hence the former are “ A due confideration that an imperfeA folution more readily pervaded and divided with fubacid li« of ifinglafs, called fning by the brewers, poffeffed a quors; but the latter, through a peculiar kind of in. peculiar property of clarifying malt-liquors, induced terwoven texture, are with great difficulty torn afun- me to attempt its analyfis in cold fubacid menfiruums. der, and long refifi the power of the fame menilruum ; One ounce and an half- of good ifinglafs, Heeped a few yet, when duly refolved, are found to ad with equal days in a gallon ofoflale beerf was converted into energy in clarifying liquor*. good fining, of a remarkably thick confifience: the “ Ifinglafs receives its different (hapes in the follow- fame quantity of glue, under fimilar treatment, yielded ing manner : only a mucilaginous liquor, refembling diluted gum- “ The parts of which it is compofed, particularly water, which, inHead of clarifying beer, increafed the founds, are taken from the fifh while fweet and both its tenacity and turbidnefs, and communicated frefh, flit open, walked from their flimy fordes, diveH- other properties in no refped correfponding;with thofe ed of every thin membrane which envelopes the found* of genuine fining. On commixing three fpoenfuls of and then expofed to Hiffen a little in the air. In this the folution of ifinglafs with a gallon of malt liquor. Hate, they are formed into rolls about the thicknefs of in a tall cylindrical glafs, a vaH number of curdly a finger, and in length according to the intended fize maffes became prefently formed, by the reciprocal at- of the fiaple: a thin membrane is generally fele£ted tra&ion of the particles of ifinglafs and the feculen- for the centre of the roll, round which the refi are cies of the beer, which, increafing in magnitude and folded alternately, and about half an iach of each ex¬ tremity (a) As the lakes of North America lie nearly in the fame latitude with the Cafpian Sea, particularly lake Su¬ perior, which is faid to be of greater extent, it was conjeftured they might abound with the fame forts of fifh \ and in confequence of public advertifements diHributed in various parts of North America, offering premiums for the founds of flurgeon and other fifh, for the purpofe of making ifinglafs, feveral fpecimens of fine ifinglafs, the produce of fifh taken in thefe parts, have been lately fent to England, with proper atteHations as to the un¬ limited quantity which may be procured. (b) If the tranfparent ifinglafs be held in certain pofitions to the light, it frequently exhibits beautiful prif- matic colours. I C H [ 99 ] I C H f4Itfcthyo- treirity of the roll i» turned inwards. The due dt- [ mentions being thus obtained, the two ends of what ff" ' '"l"' is called Jhort fiapk are pinned together with a fmall wooden peg ; the middle of the roll is then prefled a little downwards, which gives it t'te refemblance of a heart-thape ; and thus it is laid on boards, or hung up in the air to dry. The founds, which compofe the long-llaple, are longer than the former ; but the ope¬ rator lengthens this fort at pleafure, by interfolding the ends of one or more pieces of the found with each other. The extremities are faftened with a peg, like the former; but the middle part of the roll is bent more confiderably downwards; and, in order to pre- ftrve the fhape of the three obtufe angles thus formed, a piece of round flick, about a quarter of an inch dia¬ meter, is faftened in each angle with fmall wooden pegs, in the fame manner as the ends. In this ftate, it is permitted to dry long enough to retain its form, when the pegs and flicks are taken out, and the drying completed; laftly, the pieces of ifinglafs are colligated in rows, by running packthread through the peg-holes, for convenience of package and expor¬ tation. “ The membranes of the book fort, being thick and refractory, will not admit a frmilar formation with the preceding; the pieces, therefore, after their Tides are folded inwardly, are bent in the centre, in fuch manner that th^ oppofite (ides refemble the cover of a book, from whence its name; a peg being r un acrofs the middle, fallens the Tides together, and thus it is dried like the former. This fort is interleaved, and the pegs run acrofs the ends, the better to prevent its unfolding. “ That called caJte-ifwglafs is formed of the bits and fragments of the ftaple forts, put into a flat me¬ talline pail, with a very little water, and heated juft enough to make the parts cohere like a pancake when it is dried ; but frequently it is overheated, and fitch pieces, as before obferved, are ufelefs in the bufinefs of fining. Experience has taught the confumers to fejed them. “ Ilinglafs is beft made in the frtmmer, as froft gives it a difagreeable colour, deprives it of weight, and impairs its gelatinous principles ; its faflrionable forms are unnecefi’ary, and frequently injurious to its native qualities. It is common to find oily putrid matter, and exuvitt' of infefts, between the implicated membranes, which, through the inattention of the tellarman, often contaminate wines and malt-liquors in the a£l of clarification. Thefe peculiar (hapes might, probably, be introduced originally with a view to con¬ ceal and difguife the real fubftance of ifinglafs, and preierve the monopoly ; but, as the mafk is now taken off, it cannot be doubted to anfwef every purpofe more effeftually in its native ftate, without any fublequent manufacture whatever, efpecially to the principal con¬ fumers, who hence will be enabled to procure fuffici- ent fupply from the Brilifh colonies. Until this laudai- ble end can be fully accomplifhed, and as a fpecies of tfinglafs, more eafily produceable from the marine filheries, may probably be more immediately encou¬ raged, it may be manufactured as follows,: “ 1 he founds of cod and ling bear great analogy with thofe of the accipenfer genus of Einnaeu* and Ar* tedi ; and are in general fo well known as to require Ichthyo* no particular defcription. The Newfoundland and col,a' Iceland fifheimen fplit open the fifh as foon as taken, ^ and throw the back bones, with the founds annexed, in a heap ; but previous to incipient putrefaftion, the founds are cut out, wafhed from their fliraes, and fak¬ ed for ufe. In cutting out the founds, the intercoftal parts are left behind, which are much the beft ; the Iceland filhermen are fo fenfible of this, that they beat the bone upon a block with a thick flick, till the pockets, as they term them, come out eafily, and thus preferve the found entire. If the founds have been cured with fait, that muft be diffolved by fteeping them in water before they are prepared for ifinglafs ; the frefli found muft then be laid upon a block of wood, whofe lurface is a little elliptical, to the end of which a fmall hair-brufti is nailed, and with a faw knife the membranes on each fide of the found muft be fcra- ped off. The knife is rubbed upon the bruftt occa- fionally, to clear its teeth ; the pockets are cut ope* with fciffars, and perfe&ly cleanfedof the mucous mat¬ ter with a coarfe cloth ; the founds are afterwards wafiitd a few minutes in lime-water in order to abforb their oily principle, and lattly in clear water. They are then laid upon nets to dry in the air; but if in¬ tended to refemble the foreign ifinglafs, the founds of cod will ©nly admit of that called look) but thofe of ling both (hapes. The thicker the founds are, the bet¬ ter the ifinglafs, colour excepted ; but that is immate¬ rial to the brewer, who is its chief confumer. “ This ifinglafs refolves into fining, like the other forts, in fubacid liquors, as ftale beer, cyder, old hock, &c. and in equal quantities produces fimilar effedfs upon turbid liquors, except that it falls fpeedier and clofer to the bottom of the veffel, as may be demon- ftrated in tall cylindrical glaffes ; but foreign ifinglafs retains the Amfif^ency of fining preferably in warm weather, owing" go the greater tenacity of its native mucilage. ' . “ Vegetable acids are, in every refpedt, beft adap- ted to fining: the mineral acrql are too corrofive, and even infalubrious, in common beverage. “ It is remarkable, that, during the converfion df ifinglafs into fining, the acidity of the menftruum feems greatly diminilhed, at leak to tafte; not on account of any alkaline property in the ifinglafs, probably, but by its invejoping the acid particles. Jt is likewife re¬ ducible into jelly with alkaline liquors, which indeed are folvents of all animal matters; even cold lime-wa¬ ter diffolves it into a pulpous magma. Notwithftand- ing this is itiadmiflible as fining, on account of the menttruum, it produces admirable effedij in other re- fptdls: for, on commixture with compofitions of pla- fter, lime, &c. for ornamenting walls expofed to vicif- fitudes of weather, it adds firmnefs and permanency to the cement; and if common brick-mortar be worked up with this jelly, it foon becomes almoft as hard as the brick itfelf: but, for this purpofe, it is more com- modioufly prepared, by dift'olving it in cold water, aci¬ dulated with vitriolic acid ; in which cafe, the acid quits the jelly, and forms with the lime a Jiknhic mafs, while, at the fame time, the jelly being deprived in fome meafure of its moifture, through the formation of an indiifoluble concrete amongft its parts, foon N S5 dries. I C H Ichthyo- dries, and hardens into a firm body ; whence its fu- , , perior ftrength and durability are eafily compre- > hended. “ It has long been a prevalent opinion, that ftur- geon, on account of its cartilaginous nature, would yield great quantities of ifinglafs ; but, on examina¬ tion, no part of this filh, except the inner coat of the found, promifed the leaft fuccefs. This being full of ruga, adheres fo firmly to the external membrane, which is ufelefs, that the labour of feparating them fuperfedes the advantage. The inteftines, however, which in the larger fifii extend feveral yards in length, being cleanfed from their mucus, and dried, were found fuipriiingly ftrong and elaftic, refembling cords made with the inteftines of other animals, commonly called cat-gut, and, from fome trials, promifed fu- perior advantages when applied to mechanic opera¬ tions.” Ifinglafs is fometimes ufed in medicine ; and may be given in a thin acrimonious ftate of the juices, after the fame manner as the vegetable gums and mucilages, regard being had to their different difpofition to putre- fcence. ICHTHYOLOGY, the fcience of fifties, or that part of zoology which treats of fifties. See Fish. Fifties form the fourth clafs of animals in the Lin- mean fyftem. This clafs is there arranged into fix or¬ ders, under three great divifions ; _ none of which, however, include the cetaceous tribes, or the whale, dolphin, &c. thefe forming,an order of the clafs Mam- , Mali a in the fame fyftem. See Zoology. ClaMca- Mr Pennant, in his Britifti Zoology, makes a dif- tion of ferent and very judicious arrangement, by which the Sfliee. cetas are reftored to their proper rank. He diftributes fifti into three divifions, comprehending fix orders. His divifions are, into Cetaceous, Cartilaginous, and Bony. Div. I. Cetacwus Fi/h; the chara&ers of which are the following : No gills ; an orifice on the top of the head, through which they breathe and ejed: water; a flat or horizontal tail; exemplified in Plate CCLI. (lower compartment), fig. I. by the Beaked Whale, borrowed from Dale’s Hift. Harw. 411. Tab. xiv. —This divifion comprehends three ge¬ nera ; the Whale, Cachalot, and Dolphin. Div. II. Cartilaginous Fijh; the characters of which are : Breathing through certain apertures, ge¬ nerally placed on each fide the neck; but in fome in- ftances beneath, in fome above, and from one to feven in number on each part, except in the pipe-fifti, which has only one; the mufcles fupported by cartilages in- ftead of bones. Example, the Picked Dog-filh, fig. 2. a. The lateral apertures.—The genera are, the Lam¬ prey, Skate, Shark, Fiftiing-frog, Sturgeon, Sun-fifti, Lump-fifti, Pipe-fifti. Div. III. Boat Fijfb ; includes thofe whofe mufcles are fupported by bones or fpines, which breathe thro’ gills covered or guarded by thin bony plates, open on the fide, and dilatable by means of a certain row of bones on their lower part, each feparated by a thin web ; which bones are called the radii branchiojlegi, or the gill covering rays. The tails of all the fifti that form this divifion are placed in a iituation perpendicu¬ lar to the body ; and this is an invariable chara&er. The great feftions cf the Bony Fifti into apodal, l c H Thoracic, Jugular, and Abdominal, he copies from Lin- Idithya-' naeus: who founds this fyftem on a comparifon of the iosy ventral fins to the feet of land-animals or reptiles ;v——' and either from the want of them, qr their particular fituation in refpeff to the other fins, eftablilhcs his fedions.—In order to render them perfedly intelli¬ gible, it is neceflary to refer to thofe feveral organs of movement, and fome other parts, in a perfed fifti, or one taken out of the three laft fedions. In fig. 4. (the Haddock), a, is the pedoral fins; b, ventral fins; c, anal fins; d, caudal fin, or the tail; e, e, e, dorfal fins : f, bony plates that cover the gills ; g, branchi- oftegous rays and their membranes ; h, lateral or fide line. Sed. 1. Apodal: The moft imperfed, wanting the ventral fins ; illuftrated by the Conger, fig. 3, This alfo exprdfes the union ®f the dorfal and anal fins with the tail, as is found in fome few fifti.—Ge¬ nera : The Eel, Wolf-fiih, Launce, Morris, Sword- fifti. Sed. 2. Jugular : The ventral fins b, placed be¬ fore the pedoral fins a, as in the Haddock, fig. 4 Genera : The Dragonet, Weever, Codfifli, Blenny. Sed. 3. Thoracic : The ventral fins a, placed be¬ neath the pedoral fins b, as in the Father Laftier, fig. 5.—Genera : The Goby, Bull-head, Doree, Flounder, Gilt head, Wrafle, Perch, Stickleback, Mackarel, Surmullet, Gurnard. Sed. 4. Abdominal : The ventral fins placed be¬ hind the pedoral fins, as in the Minow, fig. 6.—Ge¬ nera : The Loche, Salmon, Pike, Argentine, Athe- rine. Mullet, Flying fifti, Herring, Carp. Naturalills obferve an exceeding great degree of wif- s^apeaf dom in the ftrudure of fifties, and in their conforma- fiflie aJ- tion to the element in which they are to live. Mod mirably fit- of them have the fame external form, fliarp at either end, and fwelling in the middle, by which they aremotl°n’ enabled to traverfe the fluid in which they refide with greater velocity and eafe. This ftiape is in fome meafure imitated by men in thofe veflels which they ddign to fail with the greateft fwiftnefs; but the progrefs of the fwifteft failing ftu’p is far inferior to that of fifties. Any of the large fifties overtake a (hip in full fail with the greateft eafe, play round it as though it did not move at all, and can get before it at pleafure. The chief inftruments of a fifti’s motion have ^>een ufes the fuppofed to be the fins ; which in fome are much more finsandtaih numerous than in others. A fifti completely fitted ford fifties, fwimming with rapidity, is generally furniftied with two pair of fins on the fides, and three Angle ones* two above, and one below. But it does not always happen that the filh which has the greateft number of fins is the fwifteft fvrimmer. The ftiark is thought to be one of the fwifteft fifties, and yet it has, no fins on its belly ; the haddock feems to be more completely fitted for motion, and yet it does not move fo fwiftly. It is even obfervable, that fome fifties which have no- fins at all, fuch as lobfters, dart forward with prodigi¬ ous rapidity, by means of their tail; and the inftru- ment of progrefiive motion, in all fifties, is now found to be the tail. The great ufe of the fins is to keep the body in equilibria : and if the fins are cut off, the. fifh can ft ill fwim ; but will turn upon its fides or its back, without being able to keep itfelf in an erebt pofture as before. If the fifti defires to turn, a blow from. C 100 ] logy. m feriorityof 9 fifties to f land ani I mals. I C H [ Ichthyo- from the tail fends it about in an inftant; but if the tail ftrikes both ways, then the motion is progreffive. All filhes are furnilhed with a flimy glutinous mat¬ ter, which defends their bodies from the immediate contact of the furrounding fluid, and which likewife, in all probability, afiifts their motion through the wa¬ ter. Beneath this, in many kinds, is found a ftrong covering of fcales, which, like a coat of mail, defends it ftill more powerfully ; and under that, before we come to the mufcular parts of the body, lies an oily fubflance, which alfo tends to preferve the requifite ^ warmth and vigour. Arguments -By many naturaliils fifhes are confidered as of a na¬ ture very much inferior to land animals, whether beafts or birds. Their fenfe of feeling, it is thought, mull be very obfcure on account of the fcaly coat of mail in which they are wrapped up. The fenfe of fmelling alfo, it is faid, they can have only in a very fmall de¬ gree- All fifhes, indeed, have one or more noftrils ; and even thofe that have not the holes perceptible without, yet have the bones within, properly formed for fmelling. But as the air is the only medium we know proper for the diftribution of odours, it cannot be fuppofed that thefe animals which refide conftantly in the water can be affe&ed by them. As to tailing, they feem to make very little diftin6lion. The palate of moft fifhes is hard and bony, and confequently incapable of the powers of relifhing different fub- Itances ; and accordingly thefe voracious animals have often been obferved to fwallow the fifherman’s plummet inflead of the bait. Hearing is generally thought to be totally deficient in fifhes, notwithftanding the dif- coveries of fome anatomifts who pretend to have found out the bones defigned for the organ of hearing in their heads. They have no voice, it is faid, to com¬ municate with each other, and confequently have no need of an organ for hearing. Sight feems to be that fenfe of which they are poffeffed in the greateft degree ; and yet even this feems obfcure, if we compare it with that of other animals. The eye, in almofl all fifhes, is covered with the fame tranfparent fkin which covers the reft of the head, and which probably ferves to de¬ fend it in the water, as they are without eyelids. The globe is more depreffed anteriorly, and is furnifhed be¬ hind with a mufcle which ferves to lengthen or flatten it as there is qccafion. The cryftalline humour, which in quadrupeds is flat, and of the fhape of a button- mould, or like a very convex lens, in fifhes is quite round, or fometimes oblong like an egg. Hence it is thought that fifhes are extremely near fighted ; and that, even in the water, they can peiceive objefts only at a very fmall diftance. Hence, fay they, it is evi¬ dent how far fifhes are below terreftrial animals in their fenfations, and confequently in their enjoyments. Even their brain, which is by fome fuppofed to be of a fize with every creature’s underftanding, fhows that fifhes j are very much inferior to birds in this refpedl. ©bjedtions Others argue differently with regard to the nature to thefe of fifhes.—With refpeft to the fenfe of feeling, fay arguments..they, it cannot be juftly argued that fifhes are defi¬ cient, merely becaufe they are covered with fcales, as it is poffible thefe fcales may be endued with as great a, power of fenfation as we can imagine. The fenfe of feeling is not properly connected with foftnefs in any organ, more than with bardnefs. in it. A fimilar IOI ] I C H argument may be ufed with regard to fmelling ; for W'dioy in though we do not know hovvfmells can be propagated ' , water, that is by no means a proof thalt they are not fo. On the contrary, as water is found to be capable of abforbing putrid effluvia from the air, nothing is more probable than that thefe putrid effluvia, when mixed with the water, would affeft the olfa&ory organs of fiflies, as well aa they affedt ours when mixed with the air.—With regard to tafte, it certainly appears, that fifhes are able to diftinguifh their proper food from what is improper, as well as other animals. Indeed, no voracious animal feems to be endued with much fenfibility in this refpedt ; nor would it probably be confiftent with that way of promifcuoufly devouring every creature that comes within its reach, without which thefe kinds of animals could not fsbfift. g With refpedl to the hearing, of fifnes, it is urged, Senfc of that, when kept in a pond, they may be made tohearin2’ anfwer at the call of a whiftle or the ringing of a bell; and they will even be terrified at any fudden and violent noife, fuch as thunder, the firing of guns, See. and {brink to the bottom of the water. Among the anci¬ ents, ma*y were of opinion that fifhts had the fenfe of hearing, though they were by no means fatisfied about the ways or paffages by which they heard. Pid- centini afterwards difeovered fome bones in the head of the pike, which had very much the appearance of be¬ ing organs of hearing, though he could never difeover any external paffages to them. Klein affirmed, from his own experiments and obfervations, that all fifhes have the organs of hearing ; and have alfo paffages from without to thefe organs, though in many fpecies they are difficult to be feen ; and that even the moft minute and obfcure of thefe are capable of communi¬ cating a tremulous motion to thofe organs, from founds iffuing from without. This is likewife afferted by M. Geoffroy f, who gives a particular defeription of the | D;jj-ertaj organs of hearing belonging to feveral fpecies. Thefe organs are a fet of little bones extremely hard, and-^"^ * white, like fine porcelain, which are to be found in ^97‘*- the heads of all fifhes : The external auditory paffages t’c are very fmall ; being fcarce fufficient to admit a hog’s briftle ; though with care they may be diftinguifhed in almoft all fifhes. It can by no means be thought that the water is an improper medium of found, feeing daily experience fhows us that founds may be conveyed not only through water, but through the moft folid bodies +. It feems indeed very difficult to determine 1 See /$&•■ the matter by experiment. Mr Gouan, who kept fome gold fifhes in a vafe, informs us, that whatever noife he made, he could neither terrify nor difturb them ; he halloo’d as loud as he could, putting a piece of paper between his mouth and the water, to prevent the vibrations from affefting the furface, and the filhes Hill feemed infenfible : but when the paper-was re¬ moved, and the found had its full effeft on the water, the cafe was then altered, and the fifhes inftantly funk to the bottom. This experiment, however, or others fimilar to it, cannot prove that the fifhes did not hear the founds before the paper was removed ; it only fhows that they Were not alarmed till a fenfible vibration was- introduced into the water. The call of a whiftle may alfp be fuppofed to affeft the water in a fifh-pond with a vibratory motion : but this certainly mutt be very obfcure; and if fifhes can.be affembled in this manner, i whetL I C H [ 102 khthyo- when no peifoiris in fight, it amounts to a dermnftra- 1"~y' i tion that they aftually do hear. See Comparative Anatomy, n° 167. The arguments ufed againll the fight of fifhes are the weakeft of all. Many inftances which daily occur, (how that fiihes have a very acute fight, not only of Objefts in the water, but of thofe in the air. Their jumping out of the water in order to catch flies is an abundant proof of this; and this they will continue to do in a fine fummer-evening, even after it is fo dark that we cannot diitinguifli the infe£ts they attempt to 7 catch. Fifties can- Though fifties are formed for living entirely in the without w’ater> yet they cannot fubfift v/ithout ajr. On this fubjeft Mr Hawkfbee made ftveral experiments, which are recorded in the Philofophical Tranfadtions. The fifties he employed were gudgeons ; a fpecies that are very lively in the water, and can live a confiderable time out of it. Three of them were put into a glafs veflcl with about three pints of frefti water, which was defigned as a flandard to compare the others by. Into another glafs, to a like quantity of water, were put three more gudgeons, and thus the water filled the glafs to the very brim. Upon this he fcrewed down a brafs-plate with a leather below, to prevent any com¬ munication between the water and the external air ; and, that it might the better referable a pond frozen over, he fuffered as little air as poffible to remain on the furface of the water. A third glafs had the fame quantity of water put into it ; which, firft by boilirig, and then by continuing it a whole night in vacuo, was purged of its air as well as pofiible ; and into this alfo were put three gudgeons. In about half an hour, the fifties in the water from whence the air had been ex- haufted, began to difcover fome figns of uneafinefs by a more than ordinary motion in their mouths and gills. ^ Thofe who had no communication with the external air, would at this time alfo frequently afcend to the top, and fuddenly fwim down again ; and in this ftate they continued for a confiderable time, without any fenlible alteration. About five hours after this obfer- vation, the fifties in the exhaufted water were not fo a&ive as before, upon lhaking the glafs which con¬ tained them. In three hours more, the included fiihes lay all at the bottom of the glafs with their bellies up¬ wards ; nor could they be made to ftiake their fins or tail by any motion given to the glafs. They had a motion with their mouths, however, which fliowed that they were not perfeftly dead. On uncovering the vef- fel which contained them, they revived in two or three hours, and were perfe&ly well next morning ; at which time thofe in the exhaulted water were alfo recovered. The veffel containing thefe laft being put under the receiver of an air-pump, and the air exhaufted, they all inftantly died. • They continued at top while the air remained exhaufted, but funk to the bottom on the ? of admiffion of the atmofphere. _ the gills of The ufe of air to fifties is very difficult to be ex¬ plained ; and indeed their method of obtaining the fupply of which they ftand conftantly in need, is not eafily accounted for. The motion of the gills in fifties is certainly analogous to our breathing, and feems to be the operation by which they feparate the air from the water. Their manner of breathing is as follows. The filh firft takes a quantity of water by the mouth, fiihes ana- lo(ious to our breat ] I C H which is driven to the gills ; thefe clofe, and keep the tchthyo. water which is fwallowed from returning by the mouth, lo^y- while the bony covering of the gills prevents it from * going through them till the animal has drawn the pro¬ per quantity of air from it: then the bony covers open, and give it a free pafiage; by which means alfo the gills are again opened, and admit a frefti. quantity of water. If the fifti is prevented from the free play of its gills, it foon falls into convulfions, and dies. But though this is a pretty plaufible explanation of the re- fpiration of fifties, it remains a difficulty not eafily fol- ved what is done with this air. There leems to be no receptacle for containing it, except the air-blad¬ der or fwim ; which, by the generality of modem philofophets, is deilined not to anfwer any vital pur- pofe, but only to enable the fifti to rife or fink at pka- fure- 9 The air-bladder is a bag filled with air, compofed Of the ufe fometimes of one, fometimes of two, and fometimes of >f fhe air- three divilions, fituated towards the back of the fifti, in and opening into the maw or the gullet. The ufe of this in raifing or depreffing the fifti, is proved by the following experiment. A carp being put into the air- pump, and the air exhauftedj the bladder is faid to burit by the expanfion of the air contained in it; aftef which, the fifh can no more rife to the top, but ever afterwards crawls at the bottom. The fame thing alfo happens when the air-bladder is pricked or wounded in fuch a manner as to let the air out ; in thefe cafes alfo the fifti continues at the bottom, without a poffi- bility of rifing to the top. From this it is inferred, that the ufe of the air-bladder is, by fwelling at the will of the animal, to increafe the furface of the fifti’s body, and thence diminifhing its fpecific gravity, to enable it to rife to the top of the water, and to keep there at pleafure. On the contrary, when the fifh wants to defcend, it is thought to Contraft the air- bladder ; and being thus rendered fpecifically heavier, it defcends to the bottom. The ancients were of opinion, that the air-bladder in fifties ferved for fome purpofes eflentially neceflary to life ; and Dr Prieftley alfo conjedtures, that the rai¬ fing or depreffing the fifh is not the only ufe of thefe air-bladders, but that they alfo may ferve fome other purpofes in the ceconomy of fifhes. There are many arguments indeed to be ufed on this fide of the que- ftion 1 the moft conclufive of which is, that all the car¬ tilaginous kind of fifties want air-bladders, and yet they rife to the top or fink to the bottom of the water without any difficulty j and though moft of the eel- kind have air-bladders, yet they cannot raife them- felves in the water without great difficulty. l& Fifties are remarkable for their longevity. “ Moft Longevity of the diforders incident to mankind (fays Bacon) arife of fiihes. from the changes and alterations in the atmofphere ; but fifties refide in an element little fubjeft to change ; theirs is an uniform exiftence} their movements are without effort, and their life without labour. Their bones, alfo, which are United by cartilages, admit of indefinite extenfion ; and the different fizes of animals of the fame kind, among fifties, is very various. They ftill keep growing 1 their bodies, inftead of fuffering the rigidity of age, which is the caufe of the natural decay of land-animals, ftill continue increafing with frelh fupplies ; and as the body grows, the conduits | Method* of >' ietermin- ; ing their age. Extreme voracity of fUbet. I C H r 103 1 I C H of Hfe furnifl\ their {lores in greater abundance. How her fpawn or eggs, and that the male afterwards ejeds Icht! long a filh, that feems to have fcarce any bounds put his fperm or male femen upon it in the water. The lo. t© its growth, continues to live, is not afcertained ; want of the organs of generation in fifhes gives an ap- jc|ce„ perhaps the life of a man would not be fufficient to parent probability to this: but it is ftrenuoufly oppo-< meafure that of the fmallell,”—There have been two fed by Linnaeus. He affirms, that there can be no methods fallen upon for determining the age of fifhes ; poffibility of impregnating the eggs of any animal out the one is by the circles of the fcales, the other by of its body. To confirm this, the general courfe of the tranfverfe fedlion of the back bone. When a nature, not only in birds, quadrupeds, and infedls, but fifh’s fcale is examined by a microfcope, it is found to even in the vegetable world, has been called in to his confift of a number of circles one within another, in affi(lance, as proving that all impregnation is performed fome meafure refembling thofe which appear on the while the egg is in the body of its parent: and he fup- tranfverfe fedtion of a tree, and is fuppofed to give plies the want of the organs of generation by a very the fame information. For, as in trees, we can tell llrange procefs, affirming, that the males ejedl their fe- their age by the number of their circles ; fo, in fifhes, men always fome days before the females depofit their we can tell theirs by the number of circles in every ova or fpawn ; and that the females fvvallow this, and fcale, reckoning one ring for every year of the animal’s thus have their eggs impregnated with it. He fays, exiftence.—The age of fifhes that want fcales«iay be that he has frequently feen, at this time, three or four known by the ether method, namely, by feparating females gathered about a male, and greedily fnatch- the joints of the back-bone, and then minutely ob- ing up into their mouths the femen he ejedls. He men- ferying the number of rings which the furface, where tions fome of the efoces, fome pearch, and fome of the it was joined," exhibits. cyprini, in which he had feen this procefs. But fee Fifhes are, in general, the moft voracious animals Comparative Anatomy, n0 154. in nature. In moft of them, the maw is placed next Many opinions have been ftarted in order to account the mouth; and, though poflefled of no fenfible heat, is how it happens that fifhes are found in pools, and endowed with a very furprifing faculty of digeftion. ditches, on high mountains, and elfewhere. But Its digeftive power feems, in fome meafure, to increafe Gmelin obferves, that the duck-kind fwallow the eggs in proportion to the quantity of food with which the of fifhes ; and that fome of thefe eggs go doton, and fifh is fupplied. A fingle pike has been known to de- come out of their bodies unhurt, and fo are propaga- vour 100 roaches in three days. Whatever is poffefled ted juft in the fame manner as has been obferved of of life, feems to be the moft defirable prey for fifhes. plants. Some that have very fmall mouths, feed upon worms, For a more particular view of the ftru&ure of fifhes, and the fpawn of other fifh : others, whofe mouths are fee Comparative Anatomy, n° 146—167. larger, feek larger prey ; it matters not of what kind, 1CHTH YOPHAGI, fish-eaters, a name given whether of their own fpecies, or any other. Thofe to a people, or rather to feveral different people, who with the larged mouths purfue almoft every thing that lived wholly on fifhes. The word is Greek, compounded hath life ; and often meeting each other in fierce oppo- of Plfcif, “ fifh,” and edere, “ to eat.” fition, the fifh with the largeft fwallow comes off with Thelehthyophagifpoken of by Ptolemy are placed by the viftory, and devours its antagonift.—As a coun- Sanfon in the provinces of Nanquin and Xantong. terbalance to this great voracity, however, fifhes are Agatharcides calls all the inhabitants between Carrnania incredibly prolific. Some bring forth their young and Gedrofia by the name Ichthyophagi. alive, others produce only eggs : the former are rather From the accounts given us of the Ichthyophagi by the lead fruitful; yet even thefe produce in great abun- Herodotus, Strabo, Solinus, Plutarch, &c. it appears- dance. The viviparous blenny, for inftance, brings indeed that they had cattle, but that they made no ufe forth 200 or 300 at a time. Thofe which produce of them, excepting to feed their iifli withal. They made eggs, which they are obliged to leave to chance, ei- their houfes of large fifh-bones, the ribs of whales fer- ther on the bottom where the water is {hallow, or ving them for their beams. The jaws of thefe animals floating on the furface where it is deeper, are all much ferved them for doors ; and the mortars wherein they more prolific, and feem to proportion their flock to the pounded their fifh, and baked it at the fun, were nothing danger there is of confumption.—Lewenhoeck affures elfe but their vertebrae. us, that the cod fpawns above nine millions in a feafon. 1CHTHYPERIA, in natural biftory, a name gi- The flounder commonly produces above one million, ven by Dr Hill to the bony palates and mouths of and the mackarel above 500,000. Scarce one in 100 fifhes-, ufually met with either foffile, in fingle pieces, of thefe eggs, however, brings forth an animal : they or in fragments. They are of the fame fubftance with> are devoured by all the leffer fiy that frequent the the bufonitae; and are of very various figures, fome fhores, by water-fowl in fhallow waters, and by the broad and fhort, others longer and flender ; fome very larger fifhes in deep waters. Such a prodigious increafe, gibbofe, and others plainly arched. They are likewife if permitted to come to maturity, would overftock na- of various fizes, from the tenth of an inch to two inches- ture ; even the ocean itfelf would not be able to con- in length, and an inch in breadth, tain, much lefs provide for, one half of its inhabitants. ICKENILD-street, is that old Roman highway,. But two wife purpofes are anfwered by this amazing in- denominated from the Icenians, which extended from creafe ; it preferves the fpecies in the midft of number- Yarmouth in Norfolk, the eaft part of the kingdom of lefs enemies, and ferves to furnifh the reft with a fufle- the Iceni, to Barley in Hertfordlhire, giving name in nance adapted to their nature. the way to feveral villages, as lekworth, Icklingham, With refpeA to the generation of many kinds of and Ickleton in that kingdom. From Barley to Roy- filhes, the common opinion is, that the female depofits fton it divides the counties of Cambridge and Hert- 5 &r4. ICO L 104 ] ICO koltukil ford. From Ickleford it runs by Tring, crofles Bucks II and Oxfordihire, pafles the Thames at Goring, and ex- CTS tends to the weft part of England. ICOLMKIL. See Iona. ICONIUM, at prefent Cogni, formerly the capital city of Lycaonia in Afia Minor. St Paul coming to Iconium (Afts xiii. 51. xiv. 1. &c.) in the year of Chrift 45, converted many Jews and Gentiles there. It is believed, that in his firft journey to this city, he converted St Thecla, fo celebrated in the writings of the ancient fathers. But fome incredulous Jews ex¬ cited the Gentiles to rife againft Paul and Barnabas, fo that they were upon the point of offering violence o them, which obliged St Paul and St Barnabas to fly for fecurity to the neighbouring cities. St Paul undertook a fecond journey to Iconium in the year 5 :: but we know no particulars of his journey, which . .late peculiarly to Iconium. ICONOCLASTES, or Iconoclasts, breakers of images; a name which the church of Rome gives to g:l who rejeft the ufe of images in religious matters.— The word is Greek, formed from imago, and *; rumpere, “ to break.” In *his fenfe, not only the reformed, but fome of :' . ; rn churches, are called Iconoclajies, and efteem- m heretics, as oppofing the worfhip of the >t’God and the faints, and breaking their fi¬ gures and reprefentations in churches. The opppfition to images began in Greece under the reign of Bardanes, who was created emperor of the Greeks a little after the commencement of the eighth century, when the worfhip of them became common. See Image. But the tumults occafioned by it were quelled by a revolution, which, in 713, deprived Bar¬ danes of the imperial throne. The difpute, however, broke out with redoubled fury under Leo the Ifaurian, who iffued out an edi& in the year 726, abrogating, as fome fay, the worfhip of images, and ordering all the images, except that of Chrift’s crucifixion, to be re¬ moved out of the churches ; but according to others, this edift only prohibited the paying to them anykindof ado¬ ration or worfhip. This ediA occafioned a civil war, which broke out in the iflands of the Archipelago, and by the fuggeftions of the priefts and monks, ravaged a part of Afia, and afterwards reached Italy. The civil commotions and infurre&ions in Italy were chiefly pro¬ moted by the Roman pontiffs, Gregory I. and II. Leo was excommunicated, and his fubjefts in the Italian provinces violated their allegiance, and rifing in arms either (uaffacred or banifhed all the emperor’s deputiei and officers. In confequence of thefe proceedings, Leo affembled a council at Conftantinople in 730, which de¬ graded Germanus, the bifhop of that city, who was a .patron of images ; and he ordered all the images to be publicly burnt, and infli&ed a variety of fevere puniflt- ments upon fuch as were attached to that idolatrous wor¬ fhip. Hence arofe two fa&ions ; one of which adopted theadoration and worfhip of images, and on that account were called iconoduli or iconolatra ; and the other main¬ tained *hat fuch worfhip was unlawful, and that nothing was more worthy the zeal of Chriftians than to demolilh and deftroy thofe ftatues and pi&ures which were the occafions of this grofs idolatry; and hence they were diftinguifned by the titles of iconomachi, (from e‘*"v image, and *«-xu I contend,) and iconocla/he. The zeal of Grc- ,N0 163. gory II. in favour of image worfhip, was not only imi- le^nncia- tated, but even furpaffed by his fucceflbr Gregory III. ftes- in confequence of which the Italian provinces were torn from the Grecian empire. Conftantine, called Copronymus, from xorpor « fter- cus,” and om^a. “ name,” becaufe he was faid to have defiled the facred font at his baptifm, fucceeded his father Leo in 74 r, and in 754 convened a council at Conftantinople, regarded by the Greeks as the feventh cecumenical council, which folemnly condemned the worfhip and ufe of images. Thofe who, notwithftand* ing this decree of the council, raifed commotions in the Rate, were feverely punifhed; and new laws were ena&ed, to fet bounds to the violence of monaftic rage. Leo IV. who was declared emperor in 775, purfued the fame meafures, and had recourfe to the coercive influence of penal laws, in order to extirpate idolatry out of the Chriftian church. Irene, the wife of Leo, poifoned her hufband in 780 ; affumed the reins of empire during the minority of her fon Conftantine, and in 786 fummoned a council at Nice in Bithynia, known by the name of the fecond Nicene council, which abrogated the laws and decrees againft the new ido¬ latry, reftored the worfhip of images and of the crofs, and denounced fevere punifhments againft thofe who maintained that God was the only objeft of religious adoration. In this couteft, the Britons, Germans, and Gauls, were of opinion, that images might be lawfully continued in churches, but they confidered the worfhip of them as highly injurious and offenfive to the Su¬ preme Being. Charlemagne diftinguiflied himfelf as a mediator in this controverfy: he ordered four books concerning images to be compofed, refuting the rea- fons urged by the Nicene bifhops to juftify the worfhip of images, which he fent to Adrian the Roman pon¬ tiff in 790, in order to engage him to withdraw his ap¬ probation of the decrees of the laft council of Nice. Adrian wrote an anfwer ; and in 794, a council of 300 bifhops, aflembled by Charlemagne at Francfort on the Maine, confirmed the opinion contained in the four books, and folemnly condemned the worfhip of images. In the Greek church, after the banifhment of Irene, the controverfy concerning images broke out anew, and was carried on by the contending parties, during the half of the ninth century, with various and uncertain fuccefs. The emperor Nicephorus appears upon the whole to have been an enemy to this idola¬ trous worfhip. His fucceflbr, Michael Curopalates, furnamed Rhangabe, patronized and encouraged it. But the feene changed on the acceffion of Leo the Arme¬ nian to the empire ; who aflemhled a council at Con¬ ftantinople in 814, that abolifhed the decrees of the Nicene council. His fucceflbr Michael, furnamed Bal¬ ius, difapproved the worfhip of images, and his fon Theophilus treated them with great feverity. How¬ ever, the emprefs Theodora, after his death, and du¬ ring the minority of her fon, affembled a council at Conftantinople in 842, which reinftated the decrees of the fecond Nicene council, and encouraged image worfhip by a law. The council held at the fame place under Photius, in 879, and reckoned by the Greeks the eighth general council, confirmed and renewed the Nicene decrees. In commemoration of this council, a feftival was inftituted by the fuperftitious Greeks, call¬ ed the feajl of orthodoxy. The Latins were generally /a,'/. ICO I 1^5 1 1 D Z rrogra- of opinion, that images might be {offered as the means Phia of aiding the memory of the faithful, and of calling -ofahe t0 l^e'r rememhrance the pious exploits and virtuous jron ’ actions of the perfons whom they reprefented; but they d'etefted all thoughts of paying them the lead marks of religious homage or adoration. The coun¬ cil of Paris, affembled in 824 by Louis the Meek, re- folved to allow the life of images in the churches, but feverely prohibited rendering them religious worlhip. Neverthelefs, towards the conclufion of this century, the Gallican clergy began to pay a kind of religious homage to the images of faints, and their example was followed by the Germans and other nations. How* ever, the iconoclalls ilill had their adherents among "the Latins ; the mod eminent of whom was Claudius bifhop of Turin, who, in 825., ordered all images, and even the erofs, to be cad out of the churches, and committed to the flames ; and he wrote a treatife, in •which he declared both againd the ufe and worfhip ef them. He condemned relics, pilgrimages to the holy land, and all voyages to the tombs of faints ; and to his writings and labours it was owing, that the city of Turin, and the adjacent country, was, for a long time after his death, much lefs infefted with fuperdition than the other parts of Europe. The controverfy com* cerning the fan&ity of images was again revived by Leo bifhop of Chalcedon, in the 11th century, on occafion of the emperor Alexius’s converting the fi¬ gures of iilver that adorned the portals of the churches into money in order to fupply the exigencies of the date. The biftiop obdinately maintained that he had been guilty of facrilege; and publifhed a treatife, in ’which he affirmed, that in theie images there refided an inherent fan&ity, and that the adoration of Chri- {frans ought not to be confined to the perfons repre¬ fented by thefe images, but extended to the images thtmfelves. The emperor affembkd a council at Con- ftantinople, which determined, that the images of Chrift and of the faints were to be honoured only with a relative worlhip ; and that invocation and worlhip were to be addreffed to the faints only as the fervants of Chrill, and on account of their relation to him, as their mafter. Leo, dilfatisfied even with thefe abfurd and fuperftitious decifrons, was fent into banilhment. In the wedern church, the worfhip of images was dis¬ approved and oppofed by feveral confiderable parties, as the Petrobrudians, Albigenfes, Waldenfes, &c. till at length this idolatrous practice was entirely abolilhed in many parts of the Chrillian world by the Reforma¬ tion. See Image. ICONOGRAPHIA (derived from « image,” and “ 1 deferibe), the defeription of images or ancient datues of marble and copper ; alfo of bulls and femi-buds, penates, paintings in frefco, mofaic works, and ancient pieces of miniature. ICONOLATR7E, or Iconolaters (from o*a» and x*TP!Ua “ I worihip,”) or IcoN-onuu (from nxov and “ I ferve) thofe who worlhip images : A name which the iconcclalles give to thofe of the Romilh communion, on account of their adoring images, and of rendering to them the worlhip only d«e to God. See Iconoclasts and Image. ICOSAHEDRON, in geometry, a regular folid, confilling of 20 triangular pyramids, whjfe vertexes meet in the centre of a fphere fuppofed to circum- Vol. IX. Part L feribe it ; and therefore have their height and bafts tiofandti* equal: wherefore the folidity of one of thefe pyramids H multiplied by 20, the number of Wes gives the folid _ . contents of the icofahedron. ICOSANDR1A (from [09 I J E H :fed !a ferves for a pari/h-church.—Jedburgh is the feat of threaten the jury with fines and imprifonraent, if they Jeffrey** H I! the (heriff’s court and prefbytery ; and is a barony in made the lead hefitation about bringing in ^ "r.'tannr Jehovah- Jeffreyp- ^ ^ yamjjy. 0f Lothian, whofe elckft fon is called Earl guilty. Yet it is faid, that when he w£ of Ancrum. JEDDO, the capital town Japan, where the emperor refides. It is open on all tides, having neither walls nor rampartsand the houfes are built with earth, and boarded on the out- fide to prevent the rain from deftroying the walls. In every llreet there is an iron gate, which is fhut up in the night j and a kind of cuftara-houfe or magazine, to put merchandizes in. Tt is a large place, being nine miles in length and fix in breadth, and contains 1,000,000 of inhabitants. A fire happened in rfijS, which, in the {pace of 48: hours, burnt down 100,000 lioufes, and in which a vad number of inhabitants pe- ridied. The emperor’s palace and all the red were re¬ duced to adies:; :bvrt they are all rebuilt again. The royal palace is in the middle of the town ; and is de¬ fended with walls, ditches, towers, and badions. Where the emperor refides, there are three towers nine dories high, each covered with plates of gold ; g in the prifbner, Jehovah- was in temper, and matters perfe&'ly indifferent came before him, 110 r city ©f the iHands of one became a feat of judice better. Nay, it even ap¬ pears, that, when he was under no date-influence, he was fometitnes inclined to protedl the natural and civil rights of mankind, of which the following indance has been given :—The mayor and aldermen of Bri- dol had been ufed to tranfport convicted criminals to the American plantations, and fell them by way of trade. This turning to good account, when any pil¬ ferers or petty rogues were brought before them, they threatened them with hanging ; and then fome offi¬ cers who attended, earneffly perfuaded the ignorant in¬ timidated creatures to beg for tranfportation, as the only way to fave them; and in general their advice was followed. Then, without more form, each alderman in courfe took one, and fold him for his own benefit*, and fometimes warm difputes arofe between them about the next turn. This infamous trade, which had been carried on many years, coming to the knowledge of and the Ball of audience is faid to be fupported by the lord chief juftice, he made the mayor defeend from pillars of mafly gold. Near the palace are feveral the bench, and (land at the bar in his fcarlet and furr, others, where the relations of the emperor live. The with his guilty brethren the aldermen, and plead as emprefs has a palace of her own, and there are 20 common criminals. He then obliged them to give fe- fmall ones for the concubines. Befides, all the vaflal curities to anfwer informations; but the proceedings kings have each a palace in the city, with a handfome were flopped by the Revolution.—However, the bru- garden, and ftables for 2000 horfes. The houfes of tality Jeffreys commonly (bowed on the bench, where the common fort .are nothing but a ground floor, and his voice and vifage were equally terrible, at length ex- the rooms are parted by folding-fereens 5 fo that they pofed him to a fevere mortification. A ferivener of can make the rooms larger or fmaller at pleafure. It Wannino bavlnor a raufi- bpfor^ *>;«, r>n«> ,,f is Rated in an agreeable plain, at the bottom of a fine bay ; and the river which cro(Tes it, is divided intofeve- Jal canals. E.. Long. 140. o. N. Lat. 35^ 32. JEFFERY. See Geoffrey. JEFFREYS (Sir George), baron Wem, commonly called Judge Jeffreys, was the fixth fon of John JeF freys, Efq; of Afton in Denbighfhirc ; and was edu- Wapping having a caufe before him, one; of the oppo¬ nent’s counfel faid he was a ftrange fellow, and fome¬ times went to church, and fometimes to conventiclesy and it was thought he was a trimmer. At this the chancellor fired; “ A trimmer? (faid he); I have heard much of that monfter, but never faw one. Come forth, Mr Trimmer, and let me fee your fhape.” He then treated the poor fellow fo roughly, that, on his oated at Weftminfter-fchool, whence he removed to leaving the hall, he declared he would not undergo the the Inner Temple, where he applied himfelf to the flu- terrors of that man’s face again to fave his life, and he dy of the law. Alderman Jeffreys, who was probably fliould certainly retain the frightful impreffions of it as related to him, introduced him among the citizens of long as he lived. Soon after, the prince of Orange London ; and he being a merry bottle-companion, coming, the lord chancellor, dreading the public re- foon came into great bufinefs, and was chofen their fentment, difguifed lumfelf in a feaman’s drefs, in or- .recorder. Fie was afterwards chofen folicitor to the der to leave the kingdom ; and was drinking in a cel- duke of York ; and in 1680 was knighted, and made lar, when this ferivener coming into the cellar, andfee- chief-jnftice of Chefter. At length, refigning the re- ing again the face which had filled him with fuch hor- corderfhip, he obtained the poft of chief-juftice of the ror, ftarted ; on which Jeffreys, fearing he was known, king’s-bench, and, foon after the acceflion of James II. feigned a cough, and turned to the wall with his pot the great feal. During the reign of king Charles II. of beer in his hand. But Mr Trimmer going out, gave -he fhowed himfelf a bitter enemy to thofe diffenting notice that he was there ; and the mob ruffling in, fei- minifters who, in that time of perfecution, were tried by him : he was one of the greateft advifers and pro¬ moters of all the opprefltons and arbitrary meafures carried on in the reign of James II. ; and his fanguL nary and inhuman proceedingsagainfl Monmouth’s un¬ happy adherents in the weft will ever render his name infamous. Whenever the prifoner was of a different party, or he could pleafe the court by condemning him, inftead of appearing according to the duty of his office, zed him/ and carried him before the lord-mayor, who fent him with a ftrong guard to the lords of the coun* cil, by whom he was committed to the* Tower, where he died in 1689.—It is remarkable, that the late coun- tefs-of Pomfret met with very rude infults from the po¬ pulace on the weflern road, only becaufe fhe was grand¬ daughter of the inhuman Jeffreys. JEHOVAH, one of the icripture-names of God, .fignifymg the Being who is felf-exiftent and gives exift- as his counfel, he would fcarce allow him to fpeak for ence to others, himfelf; but would load him with the groffeft and So great a veneration had the Jews for this name, . moft vulgar abufe, browbeat, infult, and turn to ridi- that they left off the cuftom of pronouncing it, whers- eule the witneffei.that fpoke in his behalf; and even by its true.pronunciation was forgotten. TheycaUitr ic~- JEN [ no ] J E 0 tetragrammaion, or “ the name with four letters ; and Cord, butchers meat, and wild fowls, are very cheap, believe, that whoever knows the true pronunciation of E. Long. 86. 25. N. Lat. 58, 40. it cannot fail to be heard by God. JENCOPING, a town of Sweden, in the province JEJUNE style. See Style. of Smaland, feated on the fouth fide of the lake Wer- JEJUNUM, the fecond of the fmall guts; thus ter, with a Ilrong citadel. The houfes are all built with called from the Latin jejunus, “ hungry;” becaufe wood. E. Long. 14. 20. N. Lat. 57. 22. always found empty. See Anatomy, n® 93. JENKIN (Robert), a learned Englifh divine in the JELLAL^EAN, or Gelal^an Calendar, epocha, 18th century, was bred at Cambridge, became mafter and year. See Calendar, Epocha, and Year. of St John’s college, and wrote feveral books much JELLY, a form of food, or medicine, prepared efteemed, w'ss. 1. An hiftorical examination of the from the juices of ripe fruits, boiled to a proper con- authority of Geneial Councils, 4to. 2. The reafon- fiftence with fugar, or the ftrong deco&ions of the ablenefs and certainty of the Chrittian religion, 2 vols horns, bones, or extremities of animals, boiled to fuch 8vo. 3. Defenfio $. Augujlint. This book is written a height as to be iliff and firm when cold, without the againft M. Le ClerC. 4. Remarks on fome books lately addition of any fugar.—The jellies of fruits are cool- publifhed, ws. Mr Whifton’s eight fermons, Locke’s ing, faponaceous, and acefcent, and therefore are good paraphrale, &c. 5. A tranflation from the French of as medicines in all diforders of the primae vise, arifmg the life of Apollonius Tyaneus. from alkalefcent juices, efpecially when not given alone, JENKINS (Henry). See Longevity. but diluted with water. On the contrary, the jellies Jenkins (Sir Leoline), a learned civilian and abfe made from animal fubltances are all alkalefcent, and are ftatefman of the laft century, born in Glamorganfhire therefore good in all cafes in which an acidity of the about the year 1623. Being rendered obnoxious to humours prevails: the alkalefcent quality of thefe is, the parliament during the civil war by adhering to the ho'wever, in a great meafure taken off, by the adding king’s caufe, he cohfulted his fafety by flight; but re¬ lemon juice and fugar to them. There were formerly turning on the relloration, he was admitted an advo- a fort of jellies much in ufe, called compound jellies; cate in the court of arches, and fucceeded Dr Exton thefe had the reftorative medicinal drugs added to them, as judge* When the queen-mother Henrietta died iri but they are now fcarce ever heard of. 2669 at Paris, her whole eftate, real and perfonal, was ‘jKLir-Oat, a preparation of common oats, recom- claimed by her nephew Louis XIV. : upon which Dr mended by many of the German phyficians in all hec- Jenkins’s opinion being called for and approved, he tic diforders, to be taken with broth of fnails or Cray- went to Paris, with three others joined with him in St fi(h.—It is made by boiling a large quantity of oats, commiffion, and recovered her effefts; for which he with the huflc taken off, with fome hartlhorn fliavings, received the honour of knighthood. He officiated as and currants together, with a leg of veal cut to pieces, one of the mediators at the treaty of Nimeguen, in and with the bones all broken ; thefe are to be fet over which tedious negociation he was engaged about four the fire with a large quantity of water, till the whole is years and a half; and was afterwards made a privy- reduced to a fort of jelly ; which when {trained and cold counfellor and fecretary of ftate. He died in 1685; will be very firm and hard. A few fpoonfuls of this and as he never married, bequeathed his whole eilate are to be taken every morning, diluted with a bafon of to charitable ufes: he was fo great a benefa&or to Je- either of the above-mentioned broths, or any other fus-college Oxford, that he is generally looked on as warm liquor. the fecond founder. All his letters and papers were JEMPTERLAND, a province of Sweden, bound- collefted and printed in 1724, in 2 vols folio, ed on the north by Angermania, on the eaft by Me- JENNY-wren, a name given by writers on fong* dalpadia, on the fouth by Helfingia, and on the weft birds to the wren. See Wren. by Norway. It is full of mountains ; and the principal JENTACULUM was, amongft the Romans, a towns are Reffundt, Lich, and Docra. morning refreftiment like our breakfaft. It was ex- JENA, a ftrong town of Germany, in the circle of ceedingly Ample, confifting, for the moft part, of Upper Saxony, and in Thuringia, with an univerfity. bread alone; labouring people indeed had fomething It is feated on the river Sala, in E. Long. 2. 59. N. more fubftantial to enable them to fupport the fatigues Lat. 51.0. of their employment. What has been here faid may JENCAPORE, a town of Afia, in Indoftan, and be obferved of the Jews and Grecians alfo. The Greeks in the dominions of the Great Mogul, capital of a ter- diftinguilhed this morning-meal by the feveral names ritory of the fame name. It is feated on the river of a/urov, axpalio-^oc or ax.pahy the Ammonites, came to defire alliitance from Jephthah ; and that he would take upon him the com¬ mand of them. Jephthah at firft reproached them with the injuftice which they had done him, or at lead which they had not prevented, when he w'as forced from his father’s houfe. But as thefe people were very earned in their requed, he told them, that he would fuccour them, provided that at the end of the war they would ac¬ knowledge him for their prince. This they confented to, and promifed with an oath. Jephthah, in the year of the world 2817, having been acknowledged prince of the Ifraelites in an affem- hly of the people, was filled with the fpirit of God, and began to get his troops together ; to that end, he went over all the land which the children of Ifrael pof- fefied beyond Jordan. At the fame time he made a vow to the Lord, that if he were fuccefsful againd the Ammonites, he would offer up for a burnt-offering whatever (hould fird come out of his houfe to meet him. The battle being fought, Jephthah remained conqueror, and ravaged all the land of Ammon. But as he returned to his houfe, his only daughter came out to meet him with timbrels and with dances: where¬ upon Jephthah tore his clothes, and faid, “ Alas, my daughter, thou had brought me very low: for I have made a vow unto the Lord, and cannot fail in the per¬ formance of it.” His daughter anfwered, “ My fa¬ ther, if thou had made a vow unto the Lord, do with me as thou had promifed ; grant me only the favour that I may be at liberty to go up to the mountains, and there for two months bewail my virginity with my companions.” Jephthah granted her this liberty; and at the end of two months, he offered up his daughter, who died a virgin, a burnt-offering, agreeable to his vow, according to the opinion of mod commentators. In the mean time, the Ephraimites, jealous of the vt&ory obtained by Jepbthah over the Ammonites, paffed the river Jordan in a tumultuous manner, came and complained to Jephthah that he had not invited them to this war, and threatened to fet fire to his houfe. Jephthah anfwered them, that he had fent to defire their afiidance; but obferving that they did not come, he put his life in his hands and hazarded a battle. The Ephraimites not being fatisfied with thefe reafons, Jephthah affembled the people of Gilead, gave them battle, and defeated them ; fo that there were two and forty thoufand men of the tribe of Ephraim killed that day. We know nothing more in particular concerning the life of Jephthah, only that he judged Ifrael fix years, and was buried in a city of Gilead. St Paul (Heb. xi. 32.) places Jephthah among the faints of the Old Teftament, the merit of whofe faith di- ftinguifhed them. But it muft be obferved, that there is 3 1 ]. I E R fomething fo extraordinary in Jephthah’s vow, that J«t>os, notwithftanding the fcripture fpeaks of it in very plain ,3ei emiah,l and clear terms, yet fuch difficulties arife concerning it _v as perplex the commentators. Some maintain, that this daughter of Jephthah was not facrificed, as that would have been a violation of the law of Mofes ; and efpecially, when by the fame law he might have re¬ deemed his daughter for ten fhekels of filver: therefore they contend, that it was fomething elfe Jephthah did to his daughter, fuch as devoting her to a Hate of ce¬ libacy, or dedicating her to the fervice of God.—On the other hand, thofe who maintain the affirmative, or that Jephthah’s daughter was adlually facrificed, urge, that the times wherein Jephthah lived were fadly ad- dided to idolatry ; alfo the manner wherein he lived before he was called to the affiflance of his country ; but above all, the clear, evident, and exprefs meaning of the text. They obferve, that vows of perpetual virginity are inftitutions of a modern date ; and had there been no more in it, there would have been little occafion for rending his clothes, and bemoaning himfelf as he did ; befides the bitter lamentations made by herfelf, and by all the daughters of Ifrael in fucceeding times. But if fhe was facrificed, we may fafely and confidently aver with Jofephus, who fays that fhe was, that this facri- fice was neither lawful nor acceptable to God ; but, on the contrary, an abominable crime, that might, not- withflanding, have proceeded from a miftaken principle of religion. JERBOA. See Mus. JEREMIAH (the Prophecy of), a canonical book of the Old Teftament. This divine writer was of the race of the priefts, the fon of Hilkia of Anathoth, of the tribe of Benjamin. He was called to the prophetic office when very young, about the 13th year of Jofiah, and continued in the difcharge of it about 40 years. He was not carried captive to Babylon with the other Jews, but remained in Judea to lament the defolation of his country. He was afterwards a prifoner in E- gypt with his difciple Baruch, where it is fuppofed he died in a very advanced age. Some of the Chriftian fathers tell us he was ftoned to death by the Jews, for preaching againft their idolatry ; and fome fay he was put ta death by Pharaoh Hophrah, becaufe of his pro¬ phecy againft him. Part of the prophecy of Jeremiah relates to the time after the captivity of Ifrael, and be¬ fore that of Judah, from the firft chapter to the 44th ; and part of it was in the time of the latter captivity, from the 44th chapter to the end. The prophet lays open the fins of Judah with great freedom and bold- nefs, and reminds them of the fevere judgments which had befallen the ten tribes for the fame offences. He ' palfionately laments their misfortune, and recommends a fpeedy reformation to them. Afterwards he predi&s the grievous calamities that were approaching, parti¬ cularly the 70 years captivity in Chaldea. He like- wife foretels their deliverance and happy return, and the recompence which Babylon, Moab. and other enemies of the Jews, fhould meet with in due time. There are likewife feveral intimations in this prophecy concerning the kingdom of the Meffiah ; alfo feveral remarkable vifions, and types, and hiftorical paffages relating to thofe times. The yzd chapter does not . belong to the prophecy of Jeremiah, which probably was added by Ezra, and contains a narrative of the ta. j E’ R i II 'Jericho king of Jerufafem, and of what happened during the Te ^ captivity of the Jews, to the death of Jechonias. St -i - - ■' 1 Jerom has obferved upon this prophet, that his ftyle is more eafy than that of Ifaiah and Hofea; that he re¬ tains fomething of the rufticily of the village where he was bora; but that he is very learned and majeftic, and equal to thofe two prophets in the fenfe of his prophecy. JERICHO, or Hiertchus (arc. geog.), a city of Judea ; fituated between Jordan and Jerufalem, at the diftance of 150 ftadia from the latter, and 60 from the former. Jofephue fays, “ the whole fpace from Jerufalem is defart and rocky, and equally barren and uncultivated from Jericho to the lake Afphaltites-; yet the places near the town and above it are extremely fertile and delicious, fo that it may be juftly called a divine plain, furpafiing the reft of the land of Canaan, no unfruitful country, and furrounded by hills in the manner of an amphitheatre. It produces opobalfa- mum myrobalans, and dates; from the laft of which it is called the city of palm-trees, by Mofes. The place is now called Raha; and is fituated, M. Volney in¬ forms us,“ in a. plain fix or feven leagues long, by three wide, around which area number of barren moun¬ tains, that render it extremely hot. Here formerly was cultivated Ihe balm of Mecca. TYora the de- fcription Of the Hadjes, this is a ftirnb fimilar to the pomegranate-tree, with leaves like thofe of rue : it bears a pulpy nut, in which is contained a kernel that yields the tefinous Juice we call balm or balfam. At prefent there is not a plant of k remaining at Raha ; but another fpecies is to be found there, called Zak- loan, which produce a fweet oil, alfo celebrated for healing wounds. This 5 ] J E R Philadelphia markets, and many of them keep large Jerfey. dairies. The markets of New York and Philadelphia' Y receive a very confiderable proportion of their fup- plies from the contiguous parts of New Jerfey. And it is worthy of remark that thefe contiguous parts are exceedingly well calculated, as to the nature and ferti¬ lity of their foils, to afford thefe fupplies ; and the in¬ tervention of a great number of navigable rivers and creeks renders it very convenient to market their pro¬ duce. Thefe fupplies confift of vegetables of marry kinds, apples, pears, peaches, plums, ftrawberries, cherries, and other fruits; cyder in large quantities and of the beft quality, butter, cheefe, beef, pork, mutton, and the leffer meats. The trade of this ftate is carried on almoft folely with and from thofe two great commercial cities, New York on one fide, and Philadelphia on the other; though it wants not good ports of its own. The articles exported, befides thofe already mentioned, are wheat, flour, horfes, live cattle, hams, which are cele¬ brated as being the beft in the world, lumber, flax, feed, leather, and iron in great quantities in pigs and bars. Formerly copper ore was reckoned among their moft valuable exports; but the mines' have not been worked fince the commencement of the late war. The iron manufa&ure is the greateft fource of wealth to the ftate. Iron works are ere&ed in Gloucefter, Burlington, Morris, and other counties. The moun¬ tains in the county of Morris give rife to a number of ftreams neceffary and convenient for thefe works, and. at the fame time furnilh a copious fupply of wood and ore of a fuperior quality. In this county alone are no lefs than feven rich iron mines, from which might be taken ore fufficient to fupply the United States; and to work it into iron arc two furnaces, two rolling and flitting mills, and about thirty forges, containing from two to four fires each. Thefe works produce annually about 540 tons of bar iron, 800 tons of pigs, befides large quantities of hollow ware, fheet iron, and nail rods. In the whole ftate, it is fuppofed there is yearly made about I200;: or.t of bar iron, 1200 do. of pigs, 80 do. of nail rods, exclufive of hollow ware, and various other caftings, of which vaft quantities are made. The charailer, manners, and cuftoms of the people are various in different parts of the ftate. The inha¬ bitants are a colle&ion of Low Dutch, Germans, Englifli, Scotch, Irifti, and New Englanders, or their defeendants. National attachment and mutual con¬ venience have generally induced thefe feveral kinds of people to fettle together in a body ; and in this way their peculiar national manners, cuftoms, and charac¬ ter, are ftill preferved, efpecially among the lower clafs of people, who have little intercourfe with any but thofe of their own nation. Religion, although its tendency is to unite people in thofe things that are effential to happinefs, occafions wide differences as to manners, cuftoms, and even chara&er. The Prefby- terian, the Quaker, the Epifcopalian, the Baptift, the German and Low Dutch Calvinift, the Methodift, and the Moravian, have each their diftinguiflring charac- teriftics, either in their worlhip, their difeipline, or their drefs. There is ftill another very perceptible charafteriftical difference, diftinft from either of the others, which ariies from the intercourfe of the inha-. P 2 bitanta J E R Jeifey. bitants with different ftates. The people in Weft Jerfey trade to Philadelphia, and of courfe imitate their fafhions, and imbibe their manners. The inha¬ bitants of Eaft Jerfey trade to New York, and regu¬ late their faihions and manners according to thofe of New York. So that the difference in regard to faihions and manners between Eaft and Weft Jerfey, is nearly as gieat as between New York and Phila¬ delphia. The people of New Jerfey are generally in- duftrious, frugal, and hofpitable. There are, compa¬ ratively, but few men of learning in the Hate, nor can it be faid that the people in general have a tafte for the fciences. The lower clafs, in which may be in- t eluded three-fifths of the inhabitants of the whole ftate, are ignorant, and are criminally negleftful in the edu¬ cation of their children. There are, in this ftate, a- boutyc Prelbyterian congregations, fubje&to the care of three Prefbyteries, viz. that of New York, of New Brunfwick, and Philadelphia; 40 congregations of the Friends; 30 of the Baptifts; 25 of Epifcopalians; 28 of the Dutch, befides a few Moravians and Me- thodifts. There are two colleges in New Jerfey ; one at Princeton, called NaJJau Hall; the other at Brunfwick, called Queen’s-college. The college at Princeton was firft founded about the year 1738, and enlarged by governor Belcher in 1747. It has an annual income of about L. 900 currency ; ,of which L. 200 arifes from funded public fecurities and lands, and the reft from the fees of the ftudents. There is a grammar- fchod of about 30 fcholars, connefted with the col¬ lege, under the fuperintendance of the prefidfnt, and taught by two mailers. Before the late revolution this college was furnifhed with a philofophical apparatus worth L. 500, which (except the elegant orrery con- ilru&ed by Mr Rittenhoufe) was almoft entirely dc- itroyed during the war, as w'as alfo the library, which now confifts of between 2000 and 3000 volumes.—The charter for Queen’s-college at Brunfwick was granted juft before the war, in confequence of an application from a body of the Dutch church. Its funds, raifed wholly by free donations, amounted foon after its eftablifhment to four thoufand pounds; but they were confiderably diminilhed by the war. The ftudents are under the care of a prefident. This college has lately increafed both in numbers and reputation. There are alfo a number of flourilhing academies in this ftate ; one. at Trenton, another in Hakkenfak, others at Orangedale, Freehold, Elizabeth-town, Burlington, Newark, Spring-field, Morriftown, Bordentown, and Amboy : but there are no regular cftablifhments for common fchools. The ufual mode of education is for the inhabitants of a village or neighbourhood to join in affording a temporary fupport for a fchoolmatter, upon fuch terms as is mutually agreeable. But the encouragement which thefe occafional teachers meet with, is generally fuch as that no perfon of abilities adequate to the bufinefs will undertake it, and of courfe little advantage is derived from thefe fchools. There are a number of towns in this ftate, nearly of equal fize and importance, and none that has more than 200 houfes, compadtly built. — 7re«ts« is the lar- geft town in New Jerfey. This town, with Lamber- ton, which joins it on the fouth, contains 200 houfes, and about ijoo inhabitants. Here the legiflature J E R meets, the fupreme court fits, and the public offices Jerfejr. are all kept, except the fecretary’s, which is at Bur- lington. On thefe accounts it is confidered as the ca¬ pital of the ftate.—Burlington Hands on the eaft fide of the Delaware, 20 miles above Philadelphia by water, and 17 by land. The ifland, which is the moft popu¬ lous part of the city, is a mile and a quarter in length, and three quarters of a mile in breadth. On the ifland are 160 houfes, 900 white and 100 black inhabitants. There are two houfes for public worlhip in the town, one for the Friends or Quakers, who are the molt nu¬ merous, and one for the Epifcopalians. The other public buildings are two market-houfes, a court-houfe, and the beft gaol in the ftate. Befides thefe, there is an academy, a free fchool, a nail manufactory, and an ex¬ cellent diftillery, if that can be called excellent which produces a poifon both of health and morals.—Perth Amboy ftands on a neck of land included between Ra¬ ritan river and Arthur Kull found. It lies open to Sandy Hook, and has one of the beft harbours on the continent. Veffels f;om fea may enter it in one tide, in almoft any weather.—Brunjwich was incorporated in 1784, and is fituated on the fouth-weft fide of Rari¬ tan river, 12 miles above Amboy. It contains about 200 houfes and 1600 inhabitants, one half of which are Dutch. Its fituation is low and unpleafant, being on the bank of the river, and under a high hill which rifes back of the town.— Princeton is a pleafant healthy village, of about 80 houfes, 52 miles from New York, and 43 from Philadelphia.—Elizabeth town and New¬ ark are pleafant towns ; the former is 15, and the lat¬ ter 9 miles from New York. Newark is famed for its good cyder. The government of this ftate is veiled in a governor, legiflative council, and general affembly. The gover¬ nor is chofen annually by the council and affembly jointly. The legiflative council is compofed of one member from each county, chofen annually by the people. The general affembly is compofed of three members from each county, chofen by the freemen. The council choofe one of their members to be vice- prefident, who, when the governor is abfent from the ftate, poffeffes the fupreme executive power. The council may originate any bills, excepting preparing and altering any money bill, which is the foie prero¬ gative of the affembly. The firft fettlers of New Jerfey were a number of Dutch emigrants from New York, who came over be¬ tween the years 1614 and 1620, and fettled in the county of Bergen. Next after thefe, in 1627, came over a colony of Swedes and Finns, and fettled on the river Delaware. The Dutch and Swedes, though not in harmony with each other, kept poffeffion of the country many years. In March 1634, Charles II. granted all the territory called by the Dutch New Ne¬ therlands, to his brother the duke of York. And in June j 664, the duke granted that part now called New Jerfey to Lord Berkeley of Stratton, and Sir Georgs Carteret, jointly; who in 1665 agreed upon certain conceffions with the people for the government of the province, and appointed Philip Carteret, Efq; their governor.—-The Dutch reduced the country in 1672; but it was reftored by the peace of Weftminfter, Fe¬ bruary 9. 1674. This ftate was the feat of war for feveral years, du¬ ring [ H6 ] J E R [i Jerfey, ring the bloody conteft. between Great Britain and A- Jcrufaieny merica. and her Ioffes, both of men and property, jn proportion to the population and wealth of the Hate, was greater than of any other of the thirteen ftates. Jersey, among woblcombers, denotes the fineft wool, taken from the reft by dreffing it with a Jerfey comb. JERUSALEM, a very famous and ancient city, capital of Judea or Paleftine, now a province of Turky in Afia. According to Manetho, an Egyptian hifto- rian, it was founded by the fhepherds who invaded E- • See E- gypt in an unknown period of antiquity *. Accord- gypt,n°». {ng to Jofephus, it was the capital of Melchifedek’s kingdom, called Salem in the book of Genefis: and the Arabians affeit, that it was built in honour of Mel- chifedek by 12 neighbouring kings; which when they had done, he called it Jerufahm. We know nothing of it with certainty, however, till the time of king David, who took it from the Jebufites, and made it the capital of his kingdom, which it ever after conti¬ nued to be. It was firft taken in the days of Je- hoafh, by Hazael the king of Syria, who flew all the nobility, but did not deftroy their city. It was af¬ terwards taken by Nebuchadnezzar king of Baby¬ lon, who deftroyed it, and carried away the inhabi¬ tants. Seventy years after, permifiion was granted by Cyrus king of Perfia to the Jews to rebuild their city, which was done ; and it continued the capital of Judea (though frequently fuffering much from the Grecian monarchs of Syria and Egypt), till the time of Vefpafian emperor of Rome, by whofe fon Titus it ..See