MASTER NEGA TIVE NO. 91-80259 MICROFILMED 1991 COLUMBIA UNIVERSITY LIBRARIES/NEW YORK as part of the Foundations of Western Civilization Preservation Project" Funded by the NATIONAL ENDOWMENT FOR THE HUMANITIES Reproductions may not be made without pennission from Columbia University Library COPYRIGHT STATEMENT The copyright law of the United States - Title 17, United States Code - concerns the making of photocopies or other reproductions of copyrighted material... Columbia University Library reserves the right to refuse to accept a copy order if, in its judgement, fulfillment of the order would mvolve violation of the copyright law. AUTHOR: EWBANK, TH TITLE: CURSORY THOU HTS RAL... PLACE: WYORK DA TE : [1 863] COLUMBIA UNIVERSITY LIBRARIES PRESERVATION DEPARTMENT % ■ BIBLIOGRAPHIC MICROFORM TARGET Master Negative # • . Original Material as Filmed - Existing Bibliographic Record 113 1 Ewl lEwbanlc, Thoiaas 1792-1870] anon i GiTTsory thou/3:hts on Gomo natural phenomena bearing chiefly on the priiwary cauce of the succocsion { of new species and on the unity of force • • • £ 2d ed signed May 1863) IJ Y c 1863? 3 46 p ; 107526 ^' I . ,_ _ • • • Restrictions on Use: "~" ~~ """ "■" ~~ ~~ *"~ ~~ ~~ "^ ~~ — ^— — — — — — — — — — — — ^— .>_ •— ^_ ^— — r -mr __ .^ „_ ^_ 1 i 1 I i t I 1 1 TECHNICAL MICROFORM DATA FILM SIZE:__0^__h:3rr>^ REDUCTION RATIO: llx 1 . IMAGE PLACEMENT: lA ® IB IIB DATE FILMED: ^UlZ^l INITIALS fclZ- RLMED BY: RESEARCH PUBLICATIONS, INC WOODBRIDGE. CT • • ... 0, c Association for information and Image Management 1100 Wayne Avenue, Suite 1100 Silver Spring. Maryland 20910 301/587-8202 Centimeter 1 irn I rr ""'"■■'■"■"""""I" 4 5 iiliiiiliiiiliiiilii I I r I I T 6 LjIi 7 8 in 9 10 11 liii|lin|liiiiliiiili TTT 12 iilii 13 14 "■■l""l""l"' 15 mm ill Inches 1.0 l£ 1 2.8 |5£ ^ III 3.2 I&3 ■^ 140 ta Mm 1.4 2.5 2.2 2.0 1.8 1.6 I.I 1.25 MfiNUFRCTURED TO RUM STRNDRRDS BY APPLIED IMAGE. INC. \j \j %' ^vm » -»*•/■ % ^$ I I 13 tw / in th^ ffiitu 0f Jl^nr ^c^vh »«! ifeatrg :f' Cd/ ^yr^^vj^c-v-o. ^^^ i& Mi I CURSORY THOUGHTS OF SOMF f.v,? i4,k a NATURAL PHENOMENA; BEARING CHIEFLY ON THE PRIMARY CAUSE or xriK SUCCESSION OF NEW SPECIES, AND ON THE UNITY OF FORCE In contemplation of created thing^s. By Bteps we may ascend to God." Milton. SECOND EDITION, WITH ADDENDA la M 3r c tD - U r k : WIM.IAM EVEHDELL^S SONS. 104 FULTON STREET. <4? CURSORY THOUGHTS ON SOME J^ATURAL PHEIOIEIA: BEAEma CHIEFLY ON THE PRIMARY CAUSE OF THE SUCCESSION OF NEW SPECIES, AND OW THE TOITY OF FORCE, In contemplation of created tilings, By 8tep8 we may ascend to God. Milton. NEW YORK: CHARLES SCRIBXER, 124 GRAXD* STREET. CH.iRLES B. RICHARDSOX, 264 CANAL STREET. > '\ ,f I > I ) ybtSi't o r CURSORY THOUGHTS, iiilO> L— On the Movemfinta of the Orbs in the Solar System.— A New Chart proposed. II.— The influence of those movements on the Development of Mundane phenomena. Origin of species, &c. Ill —Attraction the Parent of all Forces— Repulsion springs from it. I- As THERE are no absolute duplicates of mental any more than of material organisms, men can no more think alike in every minutia, than look alike. Every individual contem- plates a subject under impressions somewhat peculiar to himself, hence shades of difference abound when general uni- formity prevails. This remarkable trait in the plan of Crea- tion ?s essential to individuality, to social existence, and to progress, for if varieties of intellectual did not equal those of physical conformation much of nature's operations would escape detection ; hence the saying, that every reflecting per- son however humble his parts may contribute some one hint or other to the common stock ; — that, however often reapers may pass over the fields of knowledge, there will always be something for gleaners to pick up ; — that, as with matter, every modification of mind, the lowest as well as the highest, is not made without a purpose. 342999 4 , CURSORY THOUGHTS Students of nature know, that every form, color, quality and condition of matter is replete with instruction, and that the knowledge of it can never be exhausted. It is the same with motion and every variety of motion. Human ingenu- ity has contrived a multiplicity of mechanical movements, but, as with every discovery in the arts, they have their nat- ural prototypes on the earth or in the heavens. The lines described in space by the orbs that compose our system have not, that I am aware of, been portrayed, and yet, it is not too much to say, their varieties, their convolu, tions and circumvolutions, their mathematical accuracy, their harmony and their, beauty, present materials for a chart or a series of charts, as interesting and instructive as any that have employed the hands of engravers, or put in requi- sition eccentric or geometrical lathes. The ordinary tame diagrams of the planets, arranged in simple concentric circles, with the sun in the center, might do well enough if they impressed ordinary readers or popular audiences with the actual facts. If the sun were stationary they would do this, but as he is ever advancing through space, they do not show how a planet, the earth, for example, gets out of one circle into another to keep up with him. It is the same with the satellites. Our moon follows the earth to circulate round her, as she follows the sun to circulate round him. I would therefore have both orbital and axial movements projected ; not by plane lines but by such as accord with central and surface movements. What these are like, would be seen if every planet had marking styles that left tracings behind them. "We should then behold systems of curves running into figures allied to the engine work on watch-cases and vignettes on bank bills, and surpassing them — the best of them — in symmetry and precision. Though closed to material they are open to mental vision, and afford glimpses, in the grandest of material movements, of the glories of the invisible works of Creation. If the earth did not turn on her axis, the lines described by every part of her surface would be similar to that of her axis, but, as she turns round it every twenty-four hours, her equator describes a series of 365 circles in each revolution I' r «' <■ ON SOISIE NATURAL PHENOMENA. 5 round the sun ; hence her orbital path is made up of these instead of a single one, and these are multiplied indefinitely by points on the equator — interlocking each other more or less closely, according to the distance between the points. Again, marking pencils ranging from her equator to the poles would exhibit the phenomenon of the equatorial circles resolved, through cycloidal or epicycloidal curves, or what- ever their proper names may be, into straight lines and even mto points. The interlocked circles gradually separating, then flattening into cusped figures, next into deep, and then mto shallow undulating lines, which finally approach straight ones, and those ending at each pole in a point. With the earth's orbit of circles another set of lines is combined— those described by the moon. The period of her rotation is exactly equal to that of her sidereal sweep round the earth, hence she rolls round us twelve times in the year. She therefore contributes a series of waving lines that cross and recross the circles described by the eartli. The lines fol- lowed by the centers of the earth and her satellite should also be given in the pictorial representation. Though mentioned as circles, the orbits of both planets and moons are elliptical. That of our moon has of course the earth in one of its foci, and the ellipse is constantlv chan- ging its form and position on the plane of the earth's orbit. It is obvious that no body can move round another in a cir- cle while the center of that circle keeps going forward. — Hence elliptical orbits would seem proofs of progression of central bodies ; and may not their progression be deduced from the ellipticity of their orbits or of their secondaries. As every planet, planetoid, and moon differs more or less from the rest in the character and intersections of its curves, a chart representing the whole, or chief of them, in their order and proportion, with tha cycloidal like lines of ths rota- ting sun in their midst, and the extremes of elliptical lines brought in from various directions by the comets, would be of general, enduring, and increasing interest. To ordinary minds a glance would give pleasure, while to the studious it would be suggestive of sublime contemplations. If the lines in a representation of the whole system should be too much involved for an ordinary sized plate, let us have CURSORY THOUGHTS it in sections, or sub-systems, as those of Jupitef and Saturn, either of which would be an acquisition. IL Of the utility of such a map let no one doubt, or for a moment imagine its value would consist chiefly in pleasing the eye. As well suppose nothing interesting in flowers but their colors, or in birds but their plumage. To attain just conceptions of mundane marvels it is necessary to refer to transmundane movements : Sublime in the highest degree, and simple as sublime, all others are not only comprised with- in, but have proceeded from and are governed by them. As the whirring mechanisms of a factory stop the instant the propelling power is cut off, so would motion in all terrestrial organisms be arrested by the cessation of celestial move- ments. Hence as there is no property of matter here, so there is no motion in this part of the heavens at least, but what has a direct bearing on the progress of our species. For this the power to discover them is given. Astronomical diagrams have made clear to all comprehensions the relationship of this earth to others in its vicinity — that we are occupants of one of a number of adjoining demesnes. And have they not exploded the puerile and petulant notion that we are isolated in an obscure corner of creation ; pushed aside, as it were, like rough children out of good company. Instead of that we perceive our orb moving in the galaxy on a par with oth- ers, for of the all-pervading and sustaining influence of gravi- tation she gives as well as receives, and in proportion equal to any. Thus expanding the scripture doctrine into the heavens, that God is no respecter oi persons, and that his ten- der mercies are over all his worhs. Another common impression is, that human life runs from age to age in one unvaried round. It only seems to do so to unobservant minds. Life in the abstract is motion, but actu- al life is motion in fresh channels. There is no provision for either still life or renewing old routines of life. From some cause or other the scene is always shifting and its repetition ON SOME NATURAL PHENOMENA. avoided. The rate at which it shifts, we may be sure, is adapted to our natures and our position in creation ; too slow to be obvious to current observation, because intended to im- part, with the sense of permanence, the advantages of per- manence. Thus society to the Uving may seem stationary, but is not. We know it is not now with us what it was fifty or twenty years ago, and Ave have no reason to infer that it will be in the next century what it has been in this one, or in any one before this. If we view life in a series of circles, expanding from those of individual existences, through tribes nations and races, to the orbit of the species, we cannot iind two precisely alike. It is the same with the occupations of life. Each has a cir- cuit of its own, made up of and merging into others of ever varying sweeps, for no art or profession could have any value or even subsist^ if it were not linked to and interlinked with others. Then professions are changing, and science and art keep adding to their numbers. No phase of human life is therefore enduring, because its elements cannot be fixed. Not the circlet of a day in the experience of man, woman, or child is repeated without change. It is the same with all creatures, from the shortest to the longest of livers. There is doubtless variety in the scenes of existence of those that are born, grow old and die in a day. Every natural fact arises from an antecedent fact, and this mutation in mundane aflairs is a sequence of the changing condition of the earth herself. From center to surface she is, and always has been in process of change^ as her recording tablets, her rocks and strata proclaim. There must b^- some- thing great intended in this, and something not local here, but common to every sphere ; at least it appears of too radi- cal a character to be peculiar to one orb. To what does it point ? To a feature in creation, than which nothing makes Infinite Wisdom more manifest, or more attractive — to the UNIVERSAL LAW OF VARIETY — the illimitable evolution of new forms and conditions from limited materials. By it, sources of variety are as exhaustless on the smaller as on the lar- gest worlds — another striking proof of equality in the spheres however greatly they may difler in their external relations. Had worlds and their products been made incapable of I I 8 CURSORY THOUGHTS change, life would (judging from our feelings) have been dull and monotonous in the largest, and unendurable in the least. Here, a perpetual recurrence of the same scenes and events would eventually cause all generations to think the same thoughts and act over the same acts. One common ex- ercise of body and soul without a new result or the idea of one— not a single hope in the future, and progress impos- sible. ^ How beautifully the law of variety reverses all this ; and while it provides for indefinite changes by giving permanency to none, as respects individual existence it gives the effect of permanency to all. To what antecedent cause is thi«=; great result the sequent ? To one which has been recognised and named, but the nature of which science has not reached and perhaps never may reach. If it be an ultimate attribute ot matter there is, of course, no getting behind it. The range of physical causation terminates in the ele- ments of matter— in atoms. In them are the germs of all material developments, as the rudiments of the tree are in its seed, or those of the bird in the egg. From them creation has rjroum and continues to grow, for their reproductive pow- er can neither be exhausted nor impaired. They are not onlv the seeds but the materials of which all bodies are built, and carry with them that which gives variety and vitalitv to tJie universe — whatever it may be. But the difTiculty of conceiving how opposite or contrary results can flow from one and the same source has led to tlie doctrine of variety in atoms. To meet two great classes of phe- nomena tvyo kinds have been held necessary —Chemical atoms, txwa Physical ones whose functions are thouo-ht to be only mechanical. In addition to these, to meet another exigence, heat-maknig atoms also have been suirgested. Now poverty in the virtue of one° primordial element, is, we think, wholly inadmissible. If; on that account, two be deemed necessary, so may ten or twenty. If one be so poor m resource as to need the aid of another, with equal reason it may be held that the efficiencv of two would be increased by an additional number. Then do not two kinds of atoms im- ply two kinds of matter f The fact is, if unity on this point be once invaded there is no security against farther invasions. liic theory of Dualism, we beHeve, will be banished from <•■ ON SOME NATURAL PHENOMENA. 9 physics, however long it may be retained in ethics. From the limited progress yet made in the knowledge of nature's laws we are apt to multiply them for the solution of difficult points. This is not surprising, nor is it to be regretted. It is a natural if not a necessary step toward the discovery that in them, as in their effects, variety is the oifspring of unity — that one cause springs from another, and gives birth to a fresh one, like the limbs, branches, twigs, leaves and leaflets, etc., of a tree shooting from one bole. Such, we imagine, is the case with the properties of matter, and that attraction is the bole, or the root of the bole, whence they proceed. At all events, if they do not spring from it, they center in it, and as- suredly cannot subsist without it. From it the law, or principle, of endless variety will be found to spring. The bond of the universe, attraction holds the spheres in their orbits as it holds atoms in theirs ; for it connects them, separately and collectively, as by elastic filaments, which, though stretched through infinity, cannot be broken, or lose their contractile power. Its influence in drawing^ and ever tending to draw bodies together, and resisting their separa- tion, has been a source of perplexity, from its implying an affection, and a yearning in atoms to join one another — char- acteristics of sentient bodies, and with a power to act on one another when apart which sentient bodies do not possess. There is certainly nothing metaphorical in this, but, as an ultimate phenomenon it is irrational in the extreme to make our conceptions the standard of what is inconceivable, for how any property resides in matter is utterly incomprehensi- ble. Let it not then be imagined that there is no connecting agent between bodies because w^e perceive none. There are many things quite as mysterious, which being familiar to us excite neither surprise nor doubt. Had the elements of mat- ter instead of clinging to one another, been made unconge- nial, opposed, or indifferent to union, there had been, (we may infer,) either no distinct forms and masses, or forms and masses of dust. It is conceded that in no substance are they in actual contact, and that there may be as many degrees ot insensible as of sensible distances, so that the phenomenon is quite as inexplicable in flying a kite and drawing it in with a 10 CURSORY THOUGHTS string whose constituent particles do not touch each other, as the earth drawing the moon after her. If an ultimate cause, it matters little whether this ineffa- ble influence be the immediate or intermediate work of the Creator. It is enough that it is from Him. If attraction be considered as only drawing matter togeth- er, it would not account for diversity of forms and qualities, but viewed as carrying with it all the attributes of atoms, it will go far toward resolving all phenomena, if not all into one. We certainly do not know that any property of matter subsists, or that any action of matter takes place or can take place without it. All that is known points more directly to it, than to anything else, as the principle of action that com- ])risos all other principles, or one whose touch it is that awa- kens them. That mutation and variety come from it there is sufficient evidence, and such as seems to exclude the possibility of th(3ir ascription to aught else. As the influence of attraction, here and everywhere, is admitted to be ceaseless, it is only necessary to show that it is ceaselessly (though impercepti- bly) varying. To do this we need but appeal to the fact that its grand sources, the spheres, are every moment varying their relative positions — that neither they nor the earth, sun, planets or moon ever pass over a foot of the same track in space — and consequently their reciprocal action upon one another is every instant varying, and every fraction of every instant. Does not this show that the universe is conducted on the principle of ceaseless and endless change — that a rigid dupli- , cation of individual organisms cannot occur — that the law of transfiguration has neither cessation nor limits. Had it been otherwise, exhaustion of the Creator's resources might have been inferred. As the interlaced fibres of the human brain are seen to es- tablish a communication throughout the cerebral mass, so the proposed chart would give us a' glimpse of the lines through which the nerves of the universe run from sphere to sphere, and how they inclose tho whole in a network of attraction whose threads no forces can rupture, and through whose meshes not an atom can pass. If our system were cut ofT from the influence of others we should have many changes in thu dLUHipuLU'lUu njf i * bodies. ON SOME NATURAL PHENOMENA. 11 > * M I- but they would bs limited to those of the earth's posi- tions with respect to the other planets. If the number of these were less we should have less, and if our globe were the only one, life here would in time become a perfectly mo- notonous round. There could arise no new varieties of plants or animals, and, iiltimately, there would be no difference be- tween individuals, not even in ourselves. We should become fac-similes of one another. But as long as the earth revolves round the sun and is carried by him toward other systems, changes in her products must inevitably continue. This is the t°ue influence of the stars — one of the causes of which few of us think, and still fewer dream that they are not on the earth but in the heavens, and yet are as surely there as that we experience their effects here. As everything on the spheres contributes to and is affected by their reciprocal influence, there exists as direct a rela- tionship between their products as between themselves— between their occupants also. However modified, their bodies are formed of identically the same material as ours, and are i^^overned by the same principles; for matter is everywhere essentially the same, and the laws to which it is subject here everywhere prevail. This is no more than what might have been anticipated, for what would an external union amount to without an internal one. That would surely be an imper- fect bond of the universe which embraced the lower forms and conditions of matter, and left out its highest develop- ments. In attraction there is, so to speak, a blood relation- ship between the denizens of the spheres. It runs through the veins of them all. Katuralists, in attempting to account for successive genera and species, have not appealed to cosmical influence, but they will, if we are right in supposing the problem cannot be solved without recognising its omnipresence and power. The philosophy of a watch could never be understood by the clo- sest scrutiny of its wheels, separately or combined, as long as the spring is ignored. Investigation could result only in fruit- less conjectures, nor can living mechanisms and changes in them be explained if this the mainspring be left out. Every assigned cause less than this, has itself to be explained, and tlmt° cannot be done without referring ta another, and not 12 CURSORY THOUGHTS even then, for it would be but cliasiiig tlie secret fiom wheel to wheel. We rarely look beyond the visible and palpable. That which suffices for the business in hand is employed without considering what relations it may have to other matters. A separate cause is sought out for a separate effect. But in na- ture there are no detached causes or effects, while the nearer one approaches the ultimate, the more comprehensive it is in itself and fruitful of others. Thus wind, or steam, propels our ships over the ocean without having anything to do with the freight, while that which moves the spheres— the fleets on which all Creation's treasures are embarked — is the forming and conserving principle of both passengers and goods. There is no force in the objection drawn from great inter- vals of time between the appearance of new and disappearance of old species. Nature's developments require for their matu- rity, definite but different degrees of duration. Of these we Know little, except that they constitute an expanding series from hours, perhaps momencs, to such as may require for units of measure, centuries if not decades of centuries. Natu- ral causes are from the beginning. There can be no changes lu, no interferences with, and no additions to them ; hence whatever is mysterious is so simply because knowledge is not sufficiently advanced to explain it. It certainly is not for us, in the very infancy of our schooling, if not of" our species, to limit periods or processes of nature's developments, and when they differ from our juvenile imaginings, rather than expand our views, call in special interposition of the Creator to sanc- tion them. To the slow but ceaseless mutations of the earth's strata her products must for ever conform in order to exist. One law of growth governs al], and, according to that law, species of animals, as well as of plaiits, come in their seasons. As well look for matured frogs from tadpoles within the period assigned for their ripening, as for new species within their or- dained periods. But come as they may, they come through second causes, and the cause suggested meets every condition whether they are evolved out of old species or not. Attraction being the all comprehending principle in nature, necessarily holds the same relation to science— is its exterior circle within which all others revolve. Successfully to pcne- i: ' I ^ ON SOME NATURAL PHENOMENA. 13 trate them we must know something of it ; and so it is that onlv since it has begun to be studied has Physics made any real or substantial progress. But how much has yet to be learned ! Its workings in what is called instinct in animals have to be detected, and its operations on mind explained — how it is that mental organizations are varied by or with the material. Matter without motion is dead, and mind also. Besides the influence of its mutations and movements around us, its restlessness within us keeps the imagination from rest, both while we sleep and when awake. The sliglitest movement of the head deranges our dreams, and changing the position of the body disperses them ; nor can they be repeated, because the condition of matter within and without has in the the meantime changed. Moreover their character is affected, by the nature, quantity and digestion of our food, while opium and kindred drugs evolve preternatural visions. Thus the restlessness of mind is explained by the restlessness of that which excites it. These, of course, are natural results of a natural law, and science has to find out what attraction has to do with them — and perhaps with mental and moral affinities also. The idea that the capricious thoughts of men are subject to law, or belong to any system of order, may appear a wild one, and still be a true one. As in other things, discord in this may be harmony not understood. To superficial observation, our globe consists of miscellaneous substances in utter confusion, and not a few altogether worthless, yet the closer they are ex- amined the more clearly is design in their disposition and es- sential value in them all, made manifest. This theatre of mental activity, we may be assured, is as strictly under law as its metals and minerals, its coals, limestones and granite, though we are not yet able to observe the workings of the law. Intellectual progress, like everything else, must have a cause — an exterior and enduring stimulant — and what can it be, if not the one indicated? This is not making mind an emanation of matter, but matter the instrument for exercising ^mind. Extend the principle to all worlds, for if the true one it must be applicable to all, and have we not in attraction a simple, natural and sufficient cause for mental excitation and 14 CURSORY THOUGHTS progress on them all — however varied in their masses and volumes, their movements and products, their occupants and conditions— one accordant with the perfect sympathy which subsists between the material and immaterial, and which must subsist so long as the invisible is made discernible in the visible. Material forms and motions are embodiments of Divine thoughts, varying infinitely with the thoughts. They are the lessons given us to study. We are to translate things into thoughts, for which purpose they have to be followed through all the multiplicities of their external and internal turnings. It is pleasing to contemplate the universe, as, what we believe it literally is, a school — the spheres its class-rooms and to every class a room. In this school students can never be waiting for fresh tasks since an endless succession of them is estab- lished. Material are, and always will be, vastly in advance of intellectual developments everywhere. There is nothing ques- tionable in this. It is but saying the Teacher is in advance of his pupils. A proposition that resolves mental evolution on the spheres into that which governs their material forms and movements, may be unacceptable to some minds, but while creation is a panorama ever moving before an universal audience, and without intermission eliciting and expanding thought through- out that audience, we think there is no impropriety in sup- posing that which moves the spheres and diversifies their scenery, the instrument ordained for exciting intellectual activity upon them. In our theatres the 'scenery is changed, sometimes directly by men, and sometimes indirectly by weights, but the scenic machinery of the universe is invaria- bly moved by gravitation under the direction of its Great Manasrer. \ J ON SOME NATURAL PHENOMENA. 15 III. Section" I. — The ascription of so large a share of Crea- tion's wonders to attraction may be objected to, and perhaps will be till ALL FORGES are found resolvable into one. A numerous progeny, they appear so dissimilar in their features and habits, that, to coranioii observation, any relationship be- tween them could not be suspected, much less that they could have a common origin. The prevailing opinion is that the phenomena of nature require, at least, a duality of antago- nist forces, one to draw matter together and another to sepa- rate it. It is, indeed, obvious that if it be swelled or pushed out, it must 1)6 got back some w^ay or other, since no force can be indefinitely extended in one direction without exhausting itself, or ceasfno- to producs motion or results ; hence, it is said, if two great forces did not subsist to limit the effects of each other, the universe had been an impenetrable solid or an infinitely dilated fluid. Still, unity of force seems as natural and philosophical an inference as unity of light, heat, or of matter itself. It is diffi- cult to imagine the motive power of Creation a compound; to think the perfect harmony of its en|[ SOME NATURAL PHENOMENA. ^ f' sun and non-luminosity of the planets, the mass of the former ex- ceeding that of all the latter combined ; hence the coldness and dark- ness of space whera the means of generating heat and light are not. Then the temperature of our earth increases with pressure, from her surface to her center as already remarked ; but we ought not to have stopped there. Another test was at hand ; the atmosphere diminishes in temperature and density upwards. The lowest stratum is the warmest, and every superincumbent one less warm because of diminished pressure. We may never know how high nature's scale of density rises, but what appears to be the lowest degree, the ether outside of our atmosphere, is almost within our reach. From its tenuity and the absence of pressure, Its estimated temperature, 100^ below zero, may approximate the truth. • We have said the earth is a friction fire-mill, and we might have added that if it were not incessantly grinding out heat nothing that has life could exist upon it. * Although the sun is the most obvious and conspicuous source of heat for the earth, it is by no means the sole source of the enormous quantity that streams away in all di- rections from his surface, the earth receives but a small fraction. But it is neither lost nor wasted : he not only warms the earth, but assists to warm the universe. Our globe catches a trifling portion of his rays ; but the rest fly onward to distant regions, where all are finally intercepted by the wandering hosts of orbs with which the heavens are filled. And what the sun does, all the other stars and planets are doing. A mighty system of exchange is established among the bodies in space, by which each radiates heat to all the rest, and receives it in turn from all the rest, according to the measure of its endowments. The whole stellar universe thus con- tributes to our warmth. It is a startling fact, that if the earth were dependent alone upon the sun for heat, it would not get enough to make the existence of animal and vegetable life possible upon its surface.' Youmans. To say that heat is a common product of the earth would be say- u CUESOI^Y THOUaHTS ing little, because it is the most common and most essential. It , has, at least, three distinct sources from which it is ceaselessly streaming. 1. Gravitation, as already remarked, by compressing the whole of her materials into smaller and small spaces^ kindled and keeps alive her central fire; a feature as essential as the heart is to a living body. 2. Every individual, form and substance is an independent heat producer. It generates by attraction of cohesion the temperature natural to it. The fact is obvious in living bodies, and would be equally so in vegetables and minerals had we organs or instruments fine enough to penetrate them. 3. Every body that moves, or stirs, in or through earth, air, or water, evolves heat. Not an eyelash is raised without adding to the stock. Every earthly ttom is ceaselesdy producing it. However various its other functions are, it never stops fulfilling this one. Why all this provision for the perpetual evolution of heat here ? Because it is the most precious and prolific of mundane products. Without it, we could have no other. There is not an earthly object, or substance, of any value or use of itself, that can accomplish anything of itself. So it i% we be- lieve, with the spheres themselves. In the matter of heat how forcibly is this truth impressed upon us. While the quantity gen- erated here greatly surpasses all external supplies, they are abso- lutely indispensible. Suppose our orb isolated from others ; out- casts of creation, we should grovel in outer darkness, and be- numbed with cold, perish with chattering if not with gnashing of teeth. It is our relation to other orbs that prevents this. Con- nected by the most precious of bonds, we receive from them, in so- lar and stellar heat and light, blessings that defy the imagination to conceive greater. However foreign to us some solar products may be, none could be sent us so precious as these. We are not prepared to accept an old hypothesis, though re- vived and sanctioned by living authorities, that our gwat luminary is a mass of molten matter, its surface agitated by waves of flame and < ^ * . ( . ON SOME NATURAL PHENOMENA. 45 it nucleus subjected to violent commotions. A mere flambeau, as it were, to warm and light up our planet and others. If we had to construct lamps a thousand times larger than our apartments there might be some grounds for belief, none otherwise, that we can think of, unless the glowing sphere really is, what a learned cler- gyman of the Church of England makes it,; the :Gjeatral receptable for impenitent sinners of the system-^^an hypothesis not cumbered with the problem most perplexing to modern scientists — wliencethe material by which the combustion is kept up. (See Swinden's En- quiry into the Nature and Place of Hell. London, 1714.) The chemical unity of the whole planetary system has long been surmised, and the recent analysis di the sun's atmosphere by MM. Kirchofi" and Bunsen have, it is said, demonstrated the identity of solar and telluric substances. Iron, copper, flickel and zinc are common metals here. They appear to be quite as common, if not more so, in the sun. The discovery will lead to improved views respecting the constitution and temperature of the sun's interior. To say nothing of other materials, it is difficult to conceive how the metals just named can be generated in ' an incandescent liquid globe,' which M. Kirchoff thinks the Sun is. (See Smithsonian Re- port for 1861.) Mental culture is the criterion of human progress. To what a limited extent it has yet been carried out is apparent in the fact that in every state of enlightened Europe the great body of the people is represented as the unthinking multitude. Then, how far below even them are the populations of savage and semi-civilized lands. Under the most favorable views the amount of thought in * the world is startlingly small ; and how much of it is, even among peoples the most advanced, inane, puerile, superficial, and mere repetition I Deduct what is not original — the only real additions to the stock — and how minute the balance. Is this indicative of de- generacy in the species, as some would infer? No. This balance is, we believe, larger and of a better quality than has characterised 46 CUKSOEY THOUGHTS ON SOME NATURAL PHENOMENA. the Past. The contributions of our age have certainly exceeded the nett products of any previous age. We believe so because we believe our species is in its infancy, and consequently that it is neither remaining stationary nor retrograding, but growing in in- tellectual power and activity. A child has no idea of what he will be in vigorous manhood ; and our race seems equally unconscious of what it is to grow up to. The world has had, now and then, a few precocious students, but probably no better or closer thinkers than the average man of the race will one day be. New York, May, 1863. I':"' jr-ifirrr , f / ,~%- •>ffit- \ ■:!f \ * ■ J* * 'as.— A ' - * ^i ■>■* j--'f» '*■<> *■*■*""*: a-A<'F