This is a list of all the questions and their associated study carrel identifiers. One can learn a lot of the "aboutness" of a text simply by reading the questions.
identifier | question |
---|---|
11335 | The question must have occurred to many, what has all this to do with relativity? |
31999 | ( 1900? |
33397 | That is, if the muon did not exist, what effect would this have on the structure of matter? |
41063 | What in Winter did you there? |
27125 | The question now naturally presents itself, Why should the drop behave in this manner? |
27125 | What should we have expected the drop to do? |
49467 | But if light and heat consist of waves, what kind of waves are they and how are they produced? |
49467 | How can the same surface sometimes repel and sometimes attract a corpuscle? |
36457 | ''Where is your house?'' |
36457 | I said:''What height is it above the sea?'' |
28335 | Do you want to do the same thing right in your own home and entertain your friends with all kinds of fancy shadows? |
28335 | What could give keener delight than comical shadow- pictures, pantomimes, entertainments, etc.? |
28335 | Why not be the first in your town to give a"Fun with Soap- Bubbles Party?" |
28335 | Why not get a motor that has brains and that can do tricks and experiments? |
14725 | And what will these waves become after the said rays begin to intersect one another? |
14725 | That can not be: for if the particles of the metals are soft, how is it that polished silver and mercury reflect light so strongly? |
14725 | Whence then, one will say, does their opacity come? |
39831 | But even were the photographic record complete, what does it amount to? |
39831 | Why when the crater subsides should it flow inwards rather than outwards, so as to throw up such a remarkable central column? |
39831 | Why, for example, should the crater rise so suddenly and vertically immediately round the drop as it enters? |
45955 | But did you ever light a match, put it into a small bottle, and put the cork in? |
45955 | But how can these signals be received by the man for whom they are intended, who may be a hundred miles or more away? |
45955 | Now, suppose we were to fix_ two_ discharge- pipes to the tank, the water would run away very much quicker, would it not? |
45955 | That would dispose of the water very quickly and by a short way, would it not? |
45955 | Well, you will ask, if we can not use batteries, what is used to produce these electric lights? |
40119 | And how do coloured lights affect the visual organs so as to evoke appropriate sensations? |
40119 | If now both glasses be placed together before the slit, what will happen? |
40119 | Wherein, then, does coloured light differ from white? |
40119 | Why do things appear to be variously coloured when illuminated by light which is colourless? |
40119 | Why, then, should it be specially identified with the sensation? |
38348 | But it may be asked, In what does our really useful knowledge of light consist? |
38348 | But what, then, will be the effect of introducing a quantity of aqueous vapour into an atmosphere this nature? |
38348 | Do we find in this case any evidence of the presence of a machine for energy transmission? |
38348 | How then is the energy condition of the body to be definitely ascertained? |
38348 | What are its limits? |
38348 | What is the incepting influence in this process of transformation? |
38348 | What will be the effect of the primary mass on the planet under these new energy conditions? |
36344 | And how is it possible for him to satisfy the conflicting demand? |
36344 | But how can he suit them all in one locality on a single day? |
36344 | THE OPEN LETTER"What is lightning and what causes it?" |
36344 | The question then,"What is lightning and what causes it?" |
45515 | But, if the electrical fluid so easily pervades glass, how does the vial become_ charged_( as we term it) when we hold it in our hands? |
45515 | For if it was fine enough to come with the electrical fluid through the body of one person, why should it stop on the skin of another? |
45515 | Would not the bottle in that case be left just as we found it, uncharged, as we know a metal bottle so attempted to be charged would be? |
45515 | Would not the fire thrown in by the wire pass through to our hands, and so escape into the floor? |
32307 | 232.4->[ alpha](?) |
32307 | But what are the alpha rays? |
32307 | CHAPTER III CHANGES IN RADIO- ACTIVE BODIES Is Radio- activity a Permanent Property? |
32307 | Is this power of emitting radiations a permanent property or is it lost with the passage of time? |
32307 | \/ Mesothorium_{1}( 7.9 years)\/ Mesothorium_{2}( 8.9 hours)->[ beta]&[gamma]\/ Radiothorium( 2.91 years?) |
32307 | {->[ alpha]\/ Actinium D( 7.4 minutes)->[ beta]&[gamma]\/ Actinium E( unknown) Thorium( 4 × 10^{10} years?) |
32307 | {->[ alpha]{\/ Actinium C_{2}(?) |
37855 | 0.078 0.9 or Dec.? |
37855 | But where are the pits and cones of such eruptions? |
37855 | Could the results vary in harmony with the sun? |
37855 | Could this lead to electrolysis, hence to differentiation in volume, and thus to movements of the earth''s crust? |
37855 | Late Ordovician(?). |
37855 | Why should northern Kentucky be glaciated when northern Alaska was not? |
37855 | [ Footnote 28: J. W. Gregory: Is the Earth Drying Up? |
4908 | But what if these molecules, indestructible as they are, turn out to be not substances themselves, but mere affections of some other substance? |
4908 | But why should we labour to prove the advantage of practical science to the University? |
4908 | and how much is there of it? |
7333 | But what if the two- foot rule were to behave on the plane_ E_ in the same way as the disc- shadows_ L''_? |
7333 | Can we picture to ourselves a three- dimensional universe which is finite, yet unbounded? |
7333 | How can experience furnish an answer? |
7333 | How is this axiom to be interpreted in the older sense and in the more modern sense? |
7333 | How was unity to be preserved in his comprehension of the forces of nature? |
7333 | Now we put the question, What are the laws of disposition of the disc- shadows_ L''_ on the plane_ E_? |
7333 | So, will the initiated please pardon me, if part of what I shall bring forward has long been known? |
7333 | What do we wish to express when we say that our space is infinite? |
42613 | Also will all computer I/ O structures lend themselves to such a system; specifically, are multiport systems suitable? |
42613 | Also, how much trouble will be encountered with manufacturers''I/ O software, and how much will any necessary rewriting cost? |
42613 | Can setting up a large system truly be justified? |
42613 | Can the local computing center handle the needs, and at what cost? |
42613 | How much large- scale computing is anticipated? |
42613 | How much waiting time for results is tolerable? |
42613 | New Computer or Current Model? |
42613 | WHERE SHOULD LARGE- SCALE CALCULATIONS BE DONE? |
42613 | Where Should Large- Scale Calculations Be Done? |
33370 | Now that the cylinder and sphere are balanced I shall blow in more air, making the sphere larger; what will happen to the cylinder? |
33370 | Now why should the drops scatter? |
33370 | Suppose now that you take a small quantity of water, say as much as would go into a nut- shell, and suddenly let it go, what will happen? |
33370 | The cylinder is, as you see, very short; will it become blown out too, or what will happen? |
33370 | We have spoken of the curvature of a ball or sphere; now what is the curvature of a cylinder? |
33370 | What did the sealing- wax or the smoky flame do? |
33370 | What then is the curvature of the surface of a cylinder? |
33370 | What would happen if the weight of the drop or the force pulling it downwards could be prevented from acting? |
33370 | Which would you think would squeeze the air inside it most, a large or a small bubble? |
33370 | Who would venture to say that that was not curved? |
33370 | Why does the water remain at all? |
33370 | Will two soap- bubbles also when knocked together be unable to squeeze out the air between them? |
33370 | and what can the musical sound do to stop this from happening? |
39466 | Among the questions that await solution are: What are the relative densities of clouds? |
39466 | But to the commuter what does the weather mean? |
39466 | Do any other of the hundred and one things that are necessary for the greatest use and enjoyment of your car? |
39466 | Do you want to cure ignition troubles? |
39466 | Get the maximum wear out of your tires? |
39466 | Keep your transmission in order? |
39466 | On what does the permanence of the summer lows over the Rockies depend? |
39466 | Overhaul and adjust your carbureter? |
39466 | The puzzle is why should these areas change their power and position, and if they must change why do n''t they do it regularly? |
39466 | What are the causes and nature of precipitation? |
39466 | What influence do lunar tides bear to our weather? |
39466 | What is the original atmospheric electricity, its distribution and laws? |
39466 | What relations are there of solar radiation to our atmosphere? |
39466 | Will aërial ascents on all sides of an atmospheric disturbance discover the mechanism of storms? |
34221 | Why are our emotions called into action by modern music and modern art? 34221 Why are we tormented with this thought- stimulating age?" |
34221 | A note from her inclosed this dispatch:''What hath God wrought?'' |
34221 | I had no money; and there was no one that believed I could do it, and if I could"what good would come of it?" |
34221 | Morse has had no more credit than was due him, but has Henry had as much as is due him? |
34221 | The puzzle to most people is: How can the signals pass each other in different directions on the same wire? |
34221 | The question may be asked, why is there any regulation needed, if there is always an even head of water? |
34221 | Then you ask, how do they differ? |
34221 | Why are we called upon to help the downtrodden and oppressed, and to help to elevate mankind to a higher level? |
34221 | Why can not we be left alone in peace and quiet, to live in the easiest way?" |
34221 | Why not? |
34221 | Why this current? |
34221 | Why? |
34221 | You ask what is the difference? |
36456 | But how is man to recognise these? |
36456 | But what is this_ æther_ of which one hears so much in these days? |
36456 | But what special information do these waves, coming from the stars, convey to man? |
36456 | But why should the light be in the form of a line? |
36456 | Had we not been doing this very thing from the foundation of the world? |
36456 | How could man march if he had no road to march on? |
36456 | How, then, did we enable man to read our messages? |
36456 | If all these electrons were deprived of their energy, the atoms of matter would cease to exist, and man, where would he be? |
36456 | If man could cross- examine me or any of my fellows, I expect the first question would be-- What are you electrons made of? |
36456 | Is it an imaginary thing, or is it a reality? |
36456 | What could this mean? |
36456 | What else could they expect? |
36456 | What is an electron? |
36456 | What will happen? |
36456 | When will man succeed in discovering this secret of ours? |
36456 | Where would man be if we failed to perform our mission? |
36456 | Where would man be without us? |
13476 | But what is the ratio of the frequency of the collisions and that of the vibrations set up? |
13476 | For how is a flame produced unless by a fall of lifted weights? |
13476 | How are the highest degrees of heat reached in nature? |
13476 | How can such high temperatures be arrived at? |
13476 | How could the observer call the luminosity thus produced? |
13476 | How does the earth behave? |
13476 | How does the insulated sphere act in this case? |
13476 | Is it the less a flame because it does not hurt my eye by its brilliancy? |
13476 | Is there, I ask, can there be, a more interesting study than that of alternating currents? |
13476 | Is this energy static or kinetic? |
13476 | It did not emit much perceptible heat, nor did it glow with an intense light; but is it the less a flame because it does not scorch my hand? |
13476 | The earth is an air condenser, but is it a perfect or a very imperfect one-- a mere sink of energy? |
13476 | The question is, how far can we go with frequencies? |
13476 | The question presents itself here, can a conductor phosphoresce? |
13476 | What change have I produced in the tube in the act of exciting it? |
13476 | What determines the rigidity of a body? |
13476 | Would it not seem that it is better to employ a small button than a frail filament? |
37729 | And what other is such a Needle, but many such like Graines accumulated one upon another? |
37729 | But if as well in water as in Air, there be no Renitence against simple Division, how can we say, that the water is easlier divided than the Air? |
37729 | Now, who knows not that the true Cause is the immediate, and not the mediate[35]? |
37729 | What then is this Crassitude of the water, with which it resisteth Division? |
37729 | e. out of the water_] shall weigh four or six pounds, sinketh it to the Bottom, and being substracted, it ascends to the Surface of the water? |
46338 | Did he do it? 46338 Why so? |
46338 | (_ About 200 years old._) Will you buy, lady, buy My sweet blooming lavender? |
46338 | (_ October 28th._) It is a Bedford custom for boys to cry baked pears about the town, with the following words:-- Who knows what I have got? |
46338 | Did he do it? |
46338 | Did your eye brighten, when young lambs at play Leap''d o''er your path with animated pride, Or graz''d in merry clusters by your side? |
46338 | In a hot pot? |
46338 | May I my reason interpose, The question with an answer close? |
46338 | Oh, green bud, smile on me awhile; Oh, young bird, let me stay: What joy have we, old leaf, in thee? |
46338 | What time the daisy decks the green, Thy certain voice we hear; Hast thou a star to guide thy path, Or mark the rolling year? |
46338 | What trust to things below, whenas we see, As Men, the Heavens have their Hypocrisie? |
46338 | Where may we hear it now? |
46338 | Who knows what I have got? |
46338 | Why so?" |
46338 | Why, Valentine''s a day to choose A mistress, and our freedom lose? |
46338 | _ George Withers._***** Blue flags, yellow flags, flags all freckled, Which will you take? |
46338 | _ Herrick._***** Ye who have felt and seen Spring''s morning smiles and soul enlivening green, Say, did you give the thrilling transport way? |
46338 | _ Tusser._***** 1570(?) |
46338 | golden, golden summer, What is it thou hast done? |
15207 | Considered as a factor of attraction, is mass really indestructible? |
15207 | How is it that its charge does not waste itself away, and what bonds assure the permanence of its constitution? |
15207 | New Views on Ether and Matter: Insufficiency of Larmor''s view-- Ether definable by electric and magnetic fields-- Is matter all electrons? |
15207 | What is the nature of this energy? |
15207 | When one looks at the phenomena of induction, would it not be just to remember that Arago foresaw them, and that Michael Faraday discovered them? |
15207 | Why? |
15207 | is-- Can we make a mechanical model which corresponds to it? |
29444 | ( 4) In a galvanic battery, the source of electricity is chemical action; but what is chemical action? |
29444 | And can a body give out what it has not got? |
29444 | Are bread and butter and foods in general inert because they will not push and pull as a man or a horse may? |
29444 | Are gunpowder and nitro- glycerine inert? |
29444 | Are the cases more dissimilar than the mechanical analogy would make them seem to be? |
29444 | Are there any phenomena which imply that rotation is going on in an electric conductor? |
29444 | But how can a magnet, not subject to a varying current, change its magnetic field? |
29444 | Can any inert body weighing a pound furnish a horse- power for half a day? |
29444 | Density Density? |
29444 | Elastic Elastic? |
29444 | First, under what circumstances do electrical phenomena arise? |
29444 | How can this be explained mechanically? |
29444 | Indestructible? |
29444 | Is it not certain that the question is, How does the motion get from one to the other, whether there be a wire or not? |
29444 | Is there any necessity for assuming a mysterious agency, or a force of a_ nature_ different from the visible ones at the two ends of the line? |
29444 | Lastly, how many inert bodies together will it take to make an active body? |
29444 | Where and how did it get its heat? |
29444 | Where and how did it lose it? |
29444 | Would one need to suppose there was anything mysterious between the two-- a force, a fluid, an immaterial something? |
29444 | Would they not evidently move in the same way and for the same reason? |
45446 | Do? |
45446 | How long will it take? |
45446 | The fact is singular,he says,"and you require the reason? |
45446 | But since they agree in all the particulars wherein we can already compare them, is it not probable that they agree likewise in this? |
45446 | But since they agree in all the particulars wherein we can already compare them, is it not probable that they agree likewise in this? |
45446 | Continuing, he fleeces Paine in the following noble words:"But were you to succeed, do you imagine any good would be done by it? |
45446 | How can he, when he sees this, be otherwise animated than by the deepest feeling of humility, of devotion and of love? |
45446 | If men are so wicked_ with_ religion, what would they be_ without_ it?" |
45446 | If the earth has a magnetic field, he argued, why not the moon, the planets and the sun itself,"the mover and inciter of the universe"? |
45446 | It was as a very young man that he wrote:"What is''t that comes in false, deceitful guise, Making dull fools of those that''fore were wise? |
45446 | Must I then defend Galvani in the eyes of posterity for one of the most beautiful sentiments that can spring from the nature of man? |
45446 | Was not Laplace animated by a kindred feeling when he spoke about the infinitude of our ignorance? |
45446 | What are you thinking of, my little friend? |
45446 | What can I do?" |
38928 | And what are we to expect? |
38928 | And even, if that were the case, would not the space be quite colourless? |
38928 | But how have the particles been increased in size in the east? |
38928 | But turn up the surface next the earth, or the road, or the grass, and what do you see? |
38928 | But what is the practical benefit of this information? |
38928 | But whence comes the dust? |
38928 | CHAPTER II THE FORMATION OF DEW The writer of the Book of Job gravely asked the important question,"Who hath begotten the drops of dew?" |
38928 | CHAPTER XII HAZE What is haze? |
38928 | Can the varying condition of the sun exert any influences upon terrestrial affairs? |
38928 | Can these, then, be counted? |
38928 | Does it fall from the heavens above, or does it rise from the earth beneath?" |
38928 | For is not health the greatest of all possessions? |
38928 | Has the regular periodicity of eleven years in the sun- spots no effect upon climate and agricultural produce? |
38928 | How is it formed? |
38928 | Is it connected with the variation of rainfall, the temperature and pressure of the atmosphere, and the frequency of storms? |
38928 | Is there any audible accompaniment to the brilliant spectacle? |
38928 | Now why that brilliancy of the east, when the west was colourless? |
38928 | Now, what is this fog? |
38928 | The question has been frequently asked: Why are such aërial effects not more widely observed? |
38928 | Then what is it? |
38928 | We repeat the question in another form,"Whence comes the real dew? |
38928 | What if it were yet possible to predict the variations of prices in the coming sun- spot cycle? |
38928 | What is the cause of the spiral movement in storm- winds? |
38928 | What is the explanation? |
38928 | What, then, produces the blueness? |
38928 | Why so? |
38928 | Why was that? |
38928 | Why was the surface brighter than usual? |
10773 | At what distance would it have to be to have a time of fourteen days? 10773 But where did the ether atom come from? |
10773 | But who knows or cares for Kepler''s great law of Repulsion, or Apergy? 10773 Did it never occur to you that the ether of this solar system must be revolving around this central sun? |
10773 | Did you not see and know that if they had this revolution around a central sun it must be within a solar globe? 10773 What is the centre of this prana? |
10773 | What lies beyond the surface of the solar globe? 10773 But what are they in reality? 10773 Can you comprehend our system of metaphysics until you have clearly and completely mastered our physics? 10773 Can you not guess? 10773 Can you teach a child equation of payments before he knows the first four rules? 10773 Globes of Atma, Buddhi, and Consciousness in which the atoms, having organized, are in motion, are they not? 10773 Have we any other class of phenomena to explain, except vital and physical? 10773 How can you explain how and whence life comes, or what it is? 10773 How did it come? 10773 How do we know it? 10773 Mr. Willson, what is the melting point of iron? 10773 Pinafore''produced for the first time? |
10773 | That it consists of five ethers, corresponding to our five senses, as the ancient Hindus assert-- who can say? |
10773 | This explains physical, but how do you explain vital phenomena? |
10773 | What is it? |
10773 | What is not illusion? |
10773 | What then is real? |
10773 | Where did the atom come from? |
10773 | Why do you say the color has changed, and why do you say red? |
10773 | Why should it form by fives for iron, by nines for hydrogen? |
10773 | Why? |
10773 | Would you not get into a fog at the very start? |
1225 | Do? |
1225 | What is its use? |
1225 | ''Is it right,''he seemed to ask,''to call this agency which I have discovered electricity at all? |
1225 | ''That wo n''t do,''he said, with good- humoured impatience;''who was his predecessor?'' |
1225 | And here the question may arise in some minds, What is the use of it all? |
1225 | But how is the health? |
1225 | But so long as we are unable to reply to the question,''What is an electric current?'' |
1225 | Do these words shadow forth anything like the reality? |
1225 | Dr. Franklin says to such,"What is the use of an infant?" |
1225 | F. Then you know what the consequence of sending that letter will be? |
1225 | He found that, though the current passed through water, it did not pass through ice:--why not, since they are one and the same substance? |
1225 | If so, why should both cease when the wire ceases to move? |
1225 | Is then the act of decomposition essential to the act of conduction in these bodies? |
1225 | Is then the magnetic field really viscous, and if so, what substance exists in it and the wire to produce the viscosity? |
1225 | Is this effect an attraction and a repulsion at a distance? |
1225 | Is this new force a true repulsion, or is it merely a differential attraction? |
1225 | Might not the apparent repulsion of diamagnetic bodies be really due to the greater attraction of the medium by which they are surrounded? |
1225 | Still, if needed, an answer of another kind might be given to the question''What is its use?'' |
1225 | What do we know, he asks, of the atom apart from its force? |
1225 | What has been the practical use of the labours of Faraday? |
1225 | What must be the consequence? |
1225 | What thought remains on which to hang the imagination of an a independent of the acknowledged forces?'' |
1225 | What was the reason of this failure? |
1225 | Why, he asks, should decomposition thus take place?--what force is it that wrenches the locked constituents of these compounds asunder? |
47396 | But how are you getting on? 47396 How is it that your name is not signed to the testimony that you give? |
47396 | How long will it take? |
47396 | What is the use of an infant? |
47396 | Which shall it be? |
47396 | [ 7] Is it possible that he can be happier when lecturing to the juveniles? 47396 ''Pray how long have you known this?'' 47396 ''Then why do you come to waste my time about well- known facts, that were published forty years ago?'' 47396 2_s._ 6_d.__ The DAILY NEWS says:__ Who likes a quiet story, full of mature thought, of clear, humorous surprises, of artistic studious design? |
47396 | And after a few moments''pause he added,''Well, now have you any more facts of the sort?'' |
47396 | And how does Mrs. Phillips do; and the girls? |
47396 | And who was the prisoner who thus speculated on the applications of science to war? |
47396 | Are you comfortable? |
47396 | Are you doubtful even whilst you publish? |
47396 | Atoms, or centres of force? |
47396 | But if the heat produced during life, and necessary to life, is not life after all, why should electricity itself be life? |
47396 | By what theory is it to be accounted for? |
47396 | Could not the same effect be produced by two spiral pairs only? |
47396 | Early in the morning there came a knock at the bed- room door, but, as I happened to be performing my ablutions, I cried,"Who''s there?" |
47396 | His master''s permission was obtained, but where was the money to come from? |
47396 | How did he obtain it? |
47396 | If you assent, can you help me with any drawings or models, or illustrations either in the way of thoughts or experiments? |
47396 | It will be asked, Was this 100_l._ or 200_l._ per annum the sole income of Faraday? |
47396 | Lord Clarendon asked him:"You think it is now knocking at the door, and there is a prospect of the door being opened?" |
47396 | The gas company, I presume, came to an end; but what of the volatile liquid? |
47396 | Where was the tree rooted that bore such beautiful blossoms? |
47396 | Yet how can we properly speak of this sacred relationship, especially as the mourning widow is still amongst us? |
47396 | [ 27] But what was the use of this little spark between the shaken wires? |
47396 | and if so, what can be their smallest dimension?" |
14986 | (?) |
14986 | ), which, acting at a distance and not by the intermediate particles, has, like the force of gravity, no relation to them? |
14986 | ); for how, otherwise, could the results formerly described occur? |
14986 | ---- one element to either? |
14986 | ----, dark? |
14986 | --------, are they essentially different? |
14986 | 16 Selenium(?) |
14986 | Does not the middle part of the wire, therefore, act here as an insulating medium, though it be of metal? |
14986 | Gold(?) |
14986 | May not this be an effect identical with the attractions of similar currents? |
14986 | The question then arises, what is this limiting condition which separates, as it were, conduction and insulation from each other? |
14986 | What, then, follows as a necessary consequence of the whole experiment? |
14986 | Will the relation of C and B to A be unaltered, notwithstanding the difference of the dielectrics interposed between them? |
14986 | _ Mercury_, periodide of, an exception to the law of conduction? |
14986 | account for the transverse effects of electrical currents? |
14986 | and is not the spark through the air an indication of the tension( simultaneous with_ induction_) of the electricity in the ends of this single wire? |
14986 | whether the intensity at which the current ceased to act would be the same for all bodies? |
42245 | What, I repeat, can you expect unphilosophical minds to make of so astonishing an affair as this? 42245 Among the thousands of_ tours de force_ and of dexterity accomplished by lightning, which should we take and which leave? 42245 And of that strange imprint of the cross? 42245 Are they to be attributed to the shock, to a general upheaval which brings back the circulation to its normal course? 42245 As the cabin stands under the shade of a pine tree, one is disposed to ask whether the lightning did not strike this pine? 42245 But could anything be more dreadful than the fate of certain ships that have been struck by lightning? 42245 But that does not prove conclusively that the lightning struck upwards from the ground; it may have rebounded(?) 42245 But what is the ordinary lot of these last when science spares them? 42245 Can it be that man''s thunder can repulse that of Jupiter? 42245 Can we attribute it to physical predisposition? 42245 Can we eat with impunity the flesh of animals which have been struck? 42245 Can we, then, marvel much that lightning should rival our feeble electric resources? 42245 Did I not say just now that lightning has sometimes-- though very rarely-- exercised a beneficial influence on sick people it strikes? 42245 Does it not seem as if the lightning plays with the lives of the trees as with man? 42245 Has it not been asserted that lightning may exert a benign influence on vegetation? 42245 How are storm- clouds to be detected? 42245 How are these things to be explained? 42245 How are we to explain the following facts of nature? 42245 How often one has remarked great tree trunks in the forests, decayed and desolate, standing sadly, like poor headless bodies? 42245 How resist all the thousand delusions and uncertainties and fears the entire thing calls forth? 42245 How was the lightning able to plant in the earth, with such inconceivable rapidity, the top of the tree where the roots had been? 42245 Is not the following phenomenon enough to make lightning more mysterious in its fantastic and varied mode of action? 42245 It is to be noted that the meteor did not follow the conductor; but, after all, is not the whole tower itself the most powerful conductor imaginable? 42245 May it not have been a tattoo- mark in spite of what his companions declared? 42245 Might they not be produced by this discharge upon the surface of the body-- or by the emission of electricity from the body struck? 42245 Moreover, why are we recommended always to put the conductor into a well, damp earth, or even into a small pond? 42245 Mysterious, is it not? 42245 Photography, the photo- electric pictures produced in the laboratories of physicists, Moses''s_ figures_(? 42245 To what cause can the invulnerability of the explosive matter be due? 42245 To- day, is it not regarded by astronomers as one of the most important forces of nature? 42245 Was it not the auxiliary of the gods in the dark ages? 42245 Was not it a veritable farce? 42245 Was there in these pictures nothing but ecchymoses-- infiltrations of the blood into the cellular tissue? 42245 What are the causes of this difference? 42245 What demon guided the lightning in these scenes of pillage? 42245 What is one to think of the extraordinary way in which the figure of the Saviour was left hanging? 42245 What is this resinous matter? 42245 What shall we say now of the photographing of a landscape on the inside of the skin of sheep which had been struck by lightning? 42245 Which shall we consider the privileged words-- those taken or those left? 42245 Who can explain why it sometimes glides into a stable full of cows without injuring one? 42245 Who is to explain these anomalies? 42245 Who knows whether, later on, when phonography is brought to perfection, it will not also register the noisy accompaniment to the electric flash? 42245 Why are certain organic or non- organic bodies visited repeatedly by lightning? 42245 Why does it not invariably kill those it strikes? 42245 Why not? 42245 Why should it not be the collaborator of man''s intelligence to- morrow? 42245 Why this preference? 42245 Would it act the same with atmospheric electricity as with that in our laboratories? 42245 Would the influence of the electric matter be more dangerous in the extremities than in the middle? 42245 and why does it sometimes not even wound them? 46763 Have you found your life distasteful? |
46763 | How long will it take? |
46763 | Inertia is an essential property of matter; is it a never- failing attendant on the mind? 46763 Then why do you come to waste my time about well- known facts that were published forty years ago?" |
46763 | ''That wo n''t do,''he said, with good- humoured impatience;''who was his predecessor?'' |
46763 | Again, to the same friend, he writes:"What? |
46763 | Again: in activity, what intellectual being would resign his employment? |
46763 | Benjamin Franklin says to such,''What is the use of an infant?'' |
46763 | Dear home, dear friends, what is all this moving, and bustle, and whirl, and change worth compared to you? |
46763 | Do your joys with age diminish? |
46763 | Extreme severity''tis right to shun, For who could stand were justice only done? |
46763 | For when we met with it a second time he asked,''What is the name of that flower?'' |
46763 | He instantly said,"What do you mean by abstracting? |
46763 | I long to be in and among them all; and where can I expect to be more happy, or better off in anything? |
46763 | If the surface of the earth gave our amateur traveller cause for wonder, what must have been his feelings when he first went down to the sea- shore? |
46763 | Is there nothing in the human mind which seems analogous to this power?... |
46763 | Must in death your daylight finish? |
46763 | Now, is this the case with mental inertia?" |
46763 | O grave, where is thy victory?'' |
46763 | Or are they not always found contented to remain as if they were satisfied with their situation? |
46763 | Query by Abbott:''Then pray, Mike, why have you not answered my last before now since subjects are so plentiful?'' |
46763 | The notes are brief-- but yet how much is there not expressed in them? |
46763 | Was the dolt ever willing to resign inanity for perception? |
46763 | Was the idle mind ever yet pleased to be placed in activity? |
46763 | Was your youth of pleasure wasteful? |
46763 | Who were his parents? |
46763 | Who would be content to forego the pleasures hourly crowding upon him? |
46763 | Words are given to him,''O death, where is thy sting? |
46763 | Writing nearly a quarter of a century ago Professor Tyndall answers this question as to"What is the use of it all?" |
46763 | _ What can I do?_""Do?" |
46763 | _ What can I do?_""Do?" |
46763 | affirm you have little to say, and yet a philosopher? |
46763 | from where did they come? |
46763 | was Pepys''reply,"do? |
46763 | what did they do? |
46763 | what were they like? |
38583 | Can any one particular form of government suit all mankind? |
38583 | Do the pith- balls diverge by the disturbance of electricity through mutual induction or not? |
38583 | How may smoky chimneys be best cured? |
38583 | How may the phenomena of vapours be explained? |
38583 | How may the possessions of the Lakes be improved to our advantage? |
38583 | Is it consistent with the principles of liberty in a free government to punish a man as a libeller when he speaks the truth? |
38583 | Is self- interest the rudder that steers mankind, the universal monarch to whom all are tributaries? |
38583 | Is the emission of paper money safe? |
38583 | What is the reason that men of the greatest knowledge are not the most happy? |
38583 | What is the reason that the tides rise higher in the Bay of Fundy than the Bay of Delaware? |
38583 | What signifies philosophy that does not apply to some use? 38583 Which is least criminal-- a bad action joined with a good intention, or a good action with a bad intention?" |
38583 | Which is the best form of government? 38583 Why are tumultuous, uneasy sensations united with our desires?" |
38583 | Why does the flame of a candle tend upwards in a spire? |
38583 | And what signifies the dearness of labour, when an English shilling passes for five and twenty? |
38583 | But since they agree in all the particulars wherein we can already compare them, is it not probable they agree likewise in this? |
38583 | But were you to succeed, do you imagine any good would be done by it? |
38583 | Hence he asks,"To what a great distance may ten thousand acres of electrified cloud strike and give its fire, and how loud must be that crack? |
38583 | His constant question was"What''s the go o''that?" |
38583 | If men are so wicked_ with religion_, what would they be_ if without_ it? |
38583 | May not different degrees of the vibration of the abovementioned universal medium occasion the appearances of different colours? |
38583 | May we not learn from hence that black clothes are not so fit to wear in a hot, sunny climate or season, as white ones?" |
38583 | Must not the smallest particle conceivable have, with such a motion, a force exceeding that of a twenty- four pounder discharged from a cannon?... |
38583 | The following are specimens of subjects discussed by the club:--"Is sound an entity or body?" |
38583 | Would they caulk their ships, would they even litter their horses with wool, if it were not both plenty and cheap? |
38583 | You require the reason? |
38583 | _ Q._ And what is their temper now? |
38583 | _ Q._ Do n''t you think cloth from England absolutely necessary to them? |
38583 | _ Q._ Do you think the people of America would submit to pay the stamp duty if it was moderated? |
38583 | _ Q._ How can the commerce be affected? |
38583 | _ Q._ If the Act is not repealed, what do you think will be the consequence? |
38583 | _ Q._ Is it in their power to do without them? |
38583 | _ Q._ Is it their interest not to take them? |
38583 | _ Q._ Was it an opinion in America before 1763 that the Parliament had no right to lay taxes and duties there? |
38583 | _ Q._ What is now their pride? |
38583 | _ Q._ What used to be the pride of the Americans? |
38583 | _ Q._ What was the temper of America towards Great Britain before the year 1763? |
38583 | _ Q._ Will it not take a long time to establish that manufacture among them? |
38583 | and must they not in the mean while suffer greatly? |
38583 | and what was that form which first prevailed among mankind?" |
38583 | and, if answered in terms too general for his satisfaction, he would continue,"But what''s the particular go of it?" |
33810 | Come, qui diroit, Ou est- il? 33810 Magnes quid est? |
33810 | Sed cur sagitta, vel obelus à vero Septentrione, quandoque ad dextram,{ 12} quandoque ad sinistram declinat? 33810 371, p. 336):Karabe quid est? |
33810 | And if it be an effusion does it seize upon the air whose motion the bodies follow, or upon the bodies themselves? |
33810 | And would there then be a diurnal motion of that_ Primum Mobile_ which is so great and beyond them all immense and profound? |
33810 | At ferrum, quod pluit in Taurinis, cuius frustum apud nos extat, qua ex fodina sustulit nubes? |
33810 | But how does the loadstone feed on the iron, when the filings in which it is kept are neither consumed nor become lighter? |
33810 | But if amber allured the body itself, then what need were there of friction, if it is bare and smooth? |
33810 | But it may be asked why does amber allure water, when water placed on its surface removes its action? |
33810 | But what has attraction to do with stupefaction, or stupor with a Philosopher''s intellect, when he is discoursing about attraction? |
33810 | But what is that effluvium from crystal, glass, and diamond, since these are bodies of considerable hardness and firmly concreted? |
33810 | But which end of the iron wire will it be? |
33810 | But with regard to the_ Primum Mobile_ and its contrary and exceeding rapid movement, what are the bodies which incite it or propel it? |
33810 | Do they acquire strength like animals when{ 93} they eat and are sated? |
33810 | For what connexion is there of iron with Mars? |
33810 | If a stone weighing a drachm will lift a drachm, would a stone that weighs an ounce lift an ounce? |
33810 | If the attraction existed from heat, why should not very many other bodies also attract, if warmed by fire, by the sun, or by friction? |
33810 | Is any such magnetical effluvium given off, whether corporeal or incorporeal? |
33810 | Is it the body itself, inclosed within its own circumference? |
33810 | Is the medicine prepared by addition or subtraction? |
33810 | Is there anything which can re- create this primary form or bestow it anew? |
33810 | Is there not also something which is exhaled from them by heat and attrition? |
33810 | Or is it something imperceptible to us, which flows out from the substance into the ambient air? |
33810 | Or what is that mad force beyond the_ Primum Mobile_? |
33810 | Passando di alli a mas altura, Noruestea, que es dezir,[~q] declina al Poniente... que me digã la causa desta efecto?... |
33810 | Sed dic interea, Cur Magnes trahit ubiq; ferrum? |
33810 | The truth is that Kâhrubâ{ 34} is the gum of a tree, called jôz i rûmî[_ i.e._, roman nut; walnut? |
33810 | Then why should an attractive force of fire be looked for in amber? |
33810 | These things being so, what is it which moves? |
33810 | What has copper to do with Venus? |
33810 | What is it, then, which{ 140} preserves its verticity, and whence is it derived? |
33810 | What is the nature that conspires with it? |
33810 | or how does tin, or how does spelter correspond with Jupiter? |
33810 | or is nothing at all given off that subsists? |
33810 | præsertim[~q] si cum Electro affines sunt, quomodo& cum Adamante affinitatem habebunt, qui dissimilis Electro est?" |
33810 | quomodo igitur? |
33810 | quæ nam affinitas est pilorum,& furculorum cum Electro,& Adamante? |
58404 | Also, Why Birds are made to flye, and not Beasts? |
58404 | And Vegetables such and such sorts of shapes and properties? |
58404 | And for what Cause, or Design, have Animals such and such sorts of shapes and properties? |
58404 | But some may ask, Whether the Sensitive Parts can perceive the Rational, in one and the same Creature? |
58404 | But some may ask,_ Whether the whole Mind of one Creature, as the whole Mind of one Man, may not perceive the whole Mind of another Man_? |
58404 | But the question is, Whether the Sensitive Parts of a Human Society, do, at any time, Contemplate? |
58404 | But, my Thoughts are, at this present, in some dispute; as, Whether the Earth is a Part of the Production of Vegetables, as being the Breeder? |
58404 | But, some may ask,_ What is Law?_ I answer: Law is, Limited Prescriptions and Rules. |
58404 | If not in this World, in any other World?_ The Minor Parts were of opinion, There were none in this World; but, that there were some in other Worlds. |
58404 | Some may ask the Question,_ Whether the Rational and Sensitive, have Perception of each other?_ I answer: In my Opinion, they have. |
58404 | The Parts of my Mind were in dispute, Whether the Interior Parts of a Human Creature, had sleeping and waking actions? |
58404 | Whether a Human Creature hath Knowledg in Death, or not? |
58404 | Whether their Productions were frequent, or not?_ The Minor Part''s Opinion, was, That they were frequent. |
58404 | _ Whether it might not probably be, that the Bones or Carcase of a Human Creature, were the Root of Human Life? |
58404 | _ Whether there were any in this World? |
14000 | All the waves of the spectrum, from the extreme red to the extreme violet, are thus acted upon; but in what proportions will they be scattered? |
14000 | And the question proposed is, What is the nature of that colour? |
14000 | And yet, when analyzed, what are industrial America and industrial England? |
14000 | Are the chemical rays, then, the same in the copper and the green beech? |
14000 | Are they always so? |
14000 | Are they then alike? |
14000 | Are we to ignore all this? |
14000 | But I would appeal confidently to this assembly whether such things exhaust the demands of human nature? |
14000 | But can small particles be really proved to act in the manner indicated? |
14000 | But what, in this case, could be the material forming the waves? |
14000 | But why have we to''wait a little''before we see this effect? |
14000 | Can we have the one without the other? |
14000 | Could we have seen these men at work, without any knowledge of the consequences of their work, what should we have thought of them? |
14000 | Did this mean that the light was altogether annihilated? |
14000 | Does she continue by the play of the same forces to form the vegetable, and afterwards the animal? |
14000 | He can not consider, much less answer, the question,''What is light?'' |
14000 | How, then, did it fare with the Emission Theory when the deductions from it were brought face to face with natural phenomena? |
14000 | In what way different? |
14000 | Is it that there are two kinds of particles, the one specially fitted for transmission and the other for reflection? |
14000 | Is this exhibition of energy the work of the muscle alone? |
14000 | Let us begin our experimental inquiries here by asking, What is the meaning of blackness? |
14000 | Or shall we say it was authority merely? |
14000 | Shall we obtain two magnets, each with a single pole? |
14000 | Strange, is it not, that the beam should possess such heating power after having passed through so cold a substance? |
14000 | Surely there must be some hidden meaning in this little distance,_ d_, which turns up so constantly? |
14000 | The question now arises, what will occur supposing the ray from the water to follow the course_ n_''''''E, which lies beyond_ n_''''E? |
14000 | We may ask, in passing, what, without the faculty which formed the''image,''would Bradley''s wind and vane have been to him? |
14000 | What are we to conclude? |
14000 | What boils it? |
14000 | What is the condition of the glass while the sound is heard? |
14000 | What is the meaning of that green? |
14000 | What is this something? |
14000 | What must occur when we send a beam through both liquids? |
14000 | What urged them to those battles and those victories over reticent Nature, which have become the heritage of the human race? |
14000 | What was the motive that spurred them on? |
14000 | What, then, will occur if we break this magnet in two at the centre E? |
14000 | When I place a bar of wood across my knee and seek to break it, what is the mechanical condition of the bar? |
14000 | Whence comes that heat? |
14000 | Whence this triple complexity? |
14000 | Whence, then, are derived the colours of the soap- bubble? |
14000 | Where do her operations stop? |
14000 | Wherein consists the strength of the present theory of gravitation? |
14000 | Wherein consists the strength of the theory of undulation? |
14000 | Which? |
14000 | Why do I dwell upon these things? |
14000 | Why is this? |
14000 | Why is this? |
14000 | Why? |
14000 | Will the amount of heat generated in the battery be the same as before? |
14000 | Would it not seem that Nature harboured the intention of educating us for other enjoyments than those derivable from meat and drink? |
14000 | Would you show him the necessary patience, or grant him the necessary support? |
14000 | is it simply a pure colour of the spectrum, or is it a compound, and if so, what are its component parts? |
63372 | AND WHAT IS IT ALL ABOUT? |
63372 | And to what extent shall we be able to reconcile the results of one observer using one reference frame, and a second observer using a different one? |
63372 | And what, now, can be deduced from these very simple looking equations? |
63372 | But did you ever observe anything suggesting the presence of time in the absence of space, or vice versa? |
63372 | But is its result in agreement with actual experience? |
63372 | But is this not a relic of animism? |
63372 | But once more the question arises: What could be done by an optical experiment? |
63372 | But what about these axioms themselves? |
63372 | But which particular material reference- frame shall we use? |
63372 | But who shall define point in terms of something simpler and something which precedes point in the formulation of geometry? |
63372 | By its fruits the ether hypothesis justified itself; but does the ether exist? |
63372 | Can we tell whether we are moving through this ether, even though all parts of our apparatus move together, and at the same rate? |
63372 | Do objects on the earth, on this account, look larger to a moon observer than they do to us? |
63372 | Does it take longer to swim to a point 1 mile up a stream and back or to a point 1 mile across stream and back? |
63372 | How do we judge about it? |
63372 | How shall we determine whether this body is at rest, or whether it is moving at high or low velocity through space? |
63372 | How shall we finally determine this? |
63372 | How shall we prove it? |
63372 | How then can we talk about the relative duration of these intervals? |
63372 | If a train is 1,000 feet long at rest, how long will it be when running a mile a minute? |
63372 | If it does not, are we justified in still calling it a law of nature? |
63372 | If it passes a second observer at 60 miles per hour, what is its length as observed by him? |
63372 | If the laws begin to become, intricate, why not reshape, somewhat, the fundamental concepts, in order to simplify the scientific laws? |
63372 | Is it really impossible to distinguish between rest and motion of a body if we do not take into consideration its relations to other objects? |
63372 | Is the expression of natural law independent of or dependent upon the choice of a system of coordinates? |
63372 | Is there then in the chaos of observational disagreements anything which is independent of all observers? |
63372 | Is this geometry ever realized? |
63372 | Is this the only possible explanation? |
63372 | Is time eternal or finite? |
63372 | It is not an event about which the headline writers are likely to get greatly excited; but what of that? |
63372 | It is then in order to investigate the converse: if the lines are parallel to begin with, are the angles equal? |
63372 | May not our belief in the uniformity of time be due to the uniformity of the motion of all observers on the earth? |
63372 | Maybe the representation will be a distorted one, but who is to say which is the absolutely undistorted representation? |
63372 | Perhaps the curvature was introduced by some peculiarity of our reference framework? |
63372 | SUCCESSIVE STEPS TOWARD GENERALITY Is then our laboriously acquired geometry of points in a three- dimensional space to go into the discard? |
63372 | Shall we carry over our idea( b) to answer the next question:"To which material body shall we attach our framework?" |
63372 | So it is altogether sensible for us to ask:"Is the universe of space about us really Euclidean in whatever of realized geometry it presents to us? |
63372 | The natural question here, of course, is"Well, where are their time axes?" |
63372 | This is all very fine; but how does the geometer know what postulates to lay down? |
63372 | Time can no longer be regarded as something independent of position and motion, and the question is what is the reality? |
63372 | WHAT MAY WE TAKE FOR GRANTED? |
63372 | WHO IS MOVING? |
63372 | WHO IS RIGHT? |
63372 | We believe there are sound waves produced, and all that; but what of it? |
63372 | We think we understand this, but our understanding consists merely of the unspoken query,"Why, of course; what is there to prevent?" |
63372 | Well, how would we prove it if he told us that our space axes did not run in precisely the same direction? |
63372 | What do we mean when we say that a plane is two- dimensional? |
63372 | What is the essential peculiarity of an absolute frame? |
63372 | What may we conclude from this coincidence? |
63372 | What tells us that the second just elapsed is equal to the one following? |
63372 | Where shall we look for such a preferred coordinate system? |
63372 | Why should there be this limitation of the time- factor? |
63372 | Why, then, should that introduced by relative motion puzzle us? |
63372 | Why? |
63372 | ] 220[ Who is right? |
63372 | ]*[ But if the quantity$ E/ C^2$ is to be considered as an actual increase in mass, may it not be possible that all mass is energy? |
63372 | ]*[ For if we can not tell which of two bodies is moving, which one is shortened? |
22472 | A resinous substance that fell after a fireball? |
22472 | But that the science of Astronomy suffered the slightest in prestige? |
22472 | But what went up, from one place, in a whirlwind? |
22472 | Cannon balls and wedges, and what may they mean? |
22472 | Do you want power over something? |
22472 | Editor''s note:"May not these appearances be attributed to an abnormal state of the optic nerves of the observer?" |
22472 | How can one think of something and something else, too? |
22472 | How could a mountain be without base in a greater body? |
22472 | I shall have to accept, myself, that gelatinous substance has often fallen from the sky-- Or that, far up, or far away, the whole sky is gelatinous? |
22472 | If it stood in the sky for several days, we rank with Moses as a chronicler of improprieties-- or was that story, or datum, we mean, told by Moses? |
22472 | If six observations correlated, what more could be asked? |
22472 | Interesting, but mere speculation-- but what solid object, high in the air, had that bird struck against? |
22472 | Looking back-- why did n''t I do this or that little thing that would have cost so little and have meant so much? |
22472 | My notion of astronomic accuracy: Who could not be a prize marksman, if only his hits be recorded? |
22472 | Or-- if they were of substances that had had origin upon some other part of this earth''s surface-- had the hail, too, that origin? |
22472 | Our own expression: What matters it how we, the French Academy, or the Salvation Army may explain? |
22472 | Scientists in the past have taken the positivist attitude-- is this or that reasonable or unreasonable? |
22472 | Shadow of the earth on the moon? |
22472 | So how can you prove that something is not something else, when neither is something else some other thing? |
22472 | So we shall interpret-- and what does it matter? |
22472 | Storekeeper live without customers? |
22472 | That fragments are brought down by storms? |
22472 | That meteors tear through and detach fragments? |
22472 | That something was trawling overhead? |
22472 | That the twinkling of stars is penetration of light through something that quivers? |
22472 | The greatest of mysteries: Why do n''t they ever come here, or send here, openly? |
22472 | The mystery of it is: What could have brought so many of them together? |
22472 | The other instances seem to me to be typical of-- something like migration? |
22472 | The question: Was it a thing or the shadow of a thing? |
22472 | The shapes were of great diversity-- or different aspects of similar shapes? |
22472 | Then Mr. Proctor wrote disagreeable letters, himself, about other persons-- what else would you expect in a quasi- existence? |
22472 | Then one thinks of lightning? |
22472 | Then some pity crept in? |
22472 | What does it matter what my notions may be? |
22472 | What is a house? |
22472 | What is meant by the fittest? |
22472 | What is there to say, except that it fell with high velocity and embedded in the tree? |
22472 | When is fiction bad, cheap, low? |
22472 | Where did he get a rare coin, and why was it not missed from some collection? |
22472 | Whirlwinds we read of over and over-- but where and what whirlwind? |
22472 | Why that? |
22472 | Why? |
22472 | Will you look over your records and tell me where your engine was at about ten minutes past four, July fifth?" |
22472 | Would it be wise to establish diplomatic relation with the hen that now functions, satisfied with mere sense of achievement by way of compensation? |
22472 | You''d think that such a question as that would make trouble? |
22472 | _ Notes and Queries_, 8- 12- 228: That in the province of Macerata, Italy( summer of 1897?) |
60271 | And if not, why not assume that all lines drawn through a point outside a given line will eventually intersect it? |
60271 | Are there no outstanding difficulties? |
60271 | Are we to attribute the displacement to the gravitational field and not to the refracting matter around the sun? |
60271 | But are there such lines? |
60271 | But how do we know that the sun itself does not move with reference to some other body? |
60271 | But how much would the path of the projectile be bent? |
60271 | But if all things pointing in a certain direction are shortened to an equal extent, how are you going to notice it? |
60271 | But is there no relationship existing between the space and time of one body in the universe as compared to the space and time of another? |
60271 | But now if matter and light have the same origin, and matter is subject to gravitation, why not light also? |
60271 | But perhaps the moon itself has attractive power? |
60271 | But suppose I add that it is situated at Broadway and 117th Street, south- east? |
60271 | But then if the earth attracts the moon, why does not the moon fall to the earth? |
60271 | But what is beyond? |
60271 | But what is this ether? |
60271 | But what is this ether? |
60271 | But why should you? |
60271 | Can we not find something which holds good for all bodies in the universe? |
60271 | Did not Aristotle say that earth, air, fire and water constituted the four elements? |
60271 | Did not Ptolemy say that the earth was the center around which the sun revolved? |
60271 | Does the earth exert any gravitational pull on the moon? |
60271 | How do we know that our planetary system, and the stars, and the cosmos as a whole is not in motion? |
60271 | How does it appear? |
60271 | How will the time taken for light to travel in these two directions compare? |
60271 | If matter and light have the same origin, and if matter is subject to gravitation, why not light also? |
60271 | If one, two and three dimensions, why not four-- and five and six, for that matter? |
60271 | If water is the medium for the waves of the sea, what is the medium for the waves of light? |
60271 | If, however, there is no ether, or if we are to ignore it, how are we to get the velocity of bodies in space? |
60271 | In particular what can be done with respect to gravitational phenomena? |
60271 | Is it not, then, possible to regard the system of coordinates as at rest, and the centrifugal forces as gravitational? |
60271 | Is there no possibility of error? |
60271 | It may be asked, why does not a bullet continue moving indefinitely once it has left the barrel of the gun? |
60271 | It may well be asked, what bearing have these laws of Newton on the question of time and space? |
60271 | Must we then revise our ideas of an ether? |
60271 | Perhaps you think the attraction due to the air in between the magnet and iron? |
60271 | Probably the further up you go the less does the earth attract the apple, but at what distance does this attraction stop entirely? |
60271 | Still Another Victory? |
60271 | Suppose I say to you that the chemical laboratory of Columbia University faces Broadway; would that locate the laboratory? |
60271 | Suppose these two- dimensional beings were living on the surface of the earth; what could they see? |
60271 | Suppose we ignore the ether altogether, what then? |
60271 | To begin with, why should Einstein suppose that the path of a ray of light would be affected by the son? |
60271 | We say that it takes a"long time"to get from New York to Albany; long as compared to what? |
60271 | What Is This"Ether"? |
60271 | What charges give rise to light waves? |
60271 | What has nature to do with the coordinate systems that we propose and with their motions? |
60271 | What has this Albert Einstein done to merit such extraordinary praise? |
60271 | What is the explanation? |
60271 | What is this"something else"? |
60271 | What of the remaining 42 seconds? |
60271 | What was it? |
60271 | What would be the shape of its parabola? |
60271 | Where is the fundamental set of axes? |
60271 | Where is the rope that pulls the iron towards the magnet? |
60271 | Why did the planets move in just this way? |
60271 | Why is not the velocity of the planets reduced in time, just as the velocity of a rifle bullet decreases owing to the resistance of the air? |
60271 | Why not consider them both as brought into our equations by the agency of mathematical transformations? |
60271 | Why not? |
60271 | Why should there be to any other so- called"force,"which like centrifugal force, is independent of the nature of the matter? |
60271 | Why then is there any difference in the essence of the two? |
60271 | Why, then, question further? |
60271 | Will you apply the yard stick? |
60271 | Will you pass judgment with the help of your eyes? |
60271 | Would Einstein''s figures be confirmed? |
60271 | Would an apple reach the earth if thrown from the moon? |
60271 | Yet how can we conceive of the iron being drawn to the magnet unless there is some go- between? |
60271 | You may say, why not take our standard of time as the standard, and measure everything by it? |
60271 | [ 1] But what is this light? |
60271 | [ 5] Where Did Einstein Get His Idea of Gravitation? |
60271 | some medium not readily perceptible to the senses perhaps, and therefore not strictly a form of matter? |
60271 | that, in fact, not only the earth''s motion, but the motion of all the planets is regulated by the same means? |
38036 | ( Figure 1) Detect a Tiny Current How sensitive is your simple electric meter? |
38036 | ( b) batteries connected in series and in parallel? |
38036 | ( c) your original connection and the reverse of it? |
38036 | B-11 Credit Points 2 FIRST AID FOR ELECTRICAL INJURIES What would you do if you saw someone who had been hurt by electricity? |
38036 | B-5 Credit Points 5 WHAT MAKES MOTORS RUN What makes an electric motor run? |
38036 | But did you ever think about the electric iron that helps so much to give you that well- dressed feeling? |
38036 | Can you explain why? |
38036 | Can you make an electric motor that will run? |
38036 | Can you show by using the compass that each piece is a complete magnet? |
38036 | Can you tell why? |
38036 | Could chicks or pigs receive warmth from a heat lamp without the air in the pens becoming warm? |
38036 | Did you ever notice how snow melts faster on a black top road than it does on a concrete road? |
38036 | Did you have to walk or run some distance and perhaps shout, too, to be heard by the other person? |
38036 | Did you know that you can do this kind of a heating job three different ways? |
38036 | Did you know that you could save his life, if you had taken the time to learn and practice a few simple rules of electrical first aid? |
38036 | Did your motor speed up or slow down when you pushed the field poles out of line? |
38036 | Did your toy motor run? |
38036 | Do you see what happens and why it does? |
38036 | Does each piece have both a North Pole and a South Pole? |
38036 | Does it settle down, pointing in one direction? |
38036 | Does the South Pole of the needle attract the North or South Pole of the compass? |
38036 | For a temporary magnet? |
38036 | How can artificial magnets be made? |
38036 | How can you find out which is the North Pole of an unmarked magnet? |
38036 | How can you reverse the direction of rotation of your toy motor? |
38036 | How can you reverse the polarity? |
38036 | How did the heat get to the popcorn? |
38036 | How does a broiler unit in a range cook meat? |
38036 | How does an oven bake food? |
38036 | How does this help us to measure electricity? |
38036 | How is heat transferred from one body to another? |
38036 | How many different uses for electricity are there in your home today? |
38036 | How many more tacks were you able to pick up? |
38036 | How many motors are there in your home? |
38036 | How many poles does a magnet have? |
38036 | How many were_ common_ when your parents began to keep house? |
38036 | How much oil?______ SAE Oil______ is used for larger motors. |
38036 | How sensitive are electrical instruments? |
38036 | Is there another way too? |
38036 | Loose prongs on appliance or lamps plugs----[ Illustration: Figure 8] How Many Hazards Did You Find? |
38036 | Make Popcorn 3 Ways How do you make popcorn? |
38036 | Measure the Voltage of Batteries Do you know what difference the size of dry cell battery makes in the voltage it supplies? |
38036 | Or, why not give each member of your family a Hazard Hunt Guide and have a contest? |
38036 | Replace Any Wrong- Size Fuses Do the fuse sizes you have written on your chart agree with the ones that are in place in the panel? |
38036 | See how the compass needle changes direction? |
38036 | Talk it Over With Your Parents Do you think that your home has enough of the proper size circuits? |
38036 | The first question you should ask yourself is"Can I quickly turn off the power?" |
38036 | The rubber band should hold the switch nail tightly against nail at C. Does the bulb light? |
38036 | What Did You Learn? |
38036 | What Did You Learn? |
38036 | What Did You Learn? |
38036 | What Did You Learn? |
38036 | What Did You Learn? |
38036 | What Did You Learn? |
38036 | What Did You Learn? |
38036 | What Size Cord? |
38036 | What causes the compass to change direction when a wire carrying battery current is held over the needle? |
38036 | What does every current- carrying wire have around it? |
38036 | What happens to the magnetic polarity of the armature when you turn it slowly by hand and check it with a compass? |
38036 | What happens to the motor''s speed? |
38036 | What happens? |
38036 | What happens? |
38036 | What happens? |
38036 | What has this meant? |
38036 | What is it? |
38036 | What is the capacity of each, in watts? |
38036 | What is the difference in voltage between( a) a large and a small dry cell? |
38036 | What kind of heating took place here? |
38036 | What kind of heating was this? |
38036 | What length will be best for your various uses? |
38036 | What material is needed for a permanent magnet? |
38036 | What similarity does the test for induced current show between movement through a magnetic field and the making and breaking of a direct current? |
38036 | What will be the heaviest load you are likely to put on the cord, in amperes? |
38036 | What''s In A Lamp? |
38036 | What''s Your Electric Bill? |
38036 | Where are natural magnets obtained? |
38036 | Which magnetic poles attract each other? |
38036 | Which way does the compass point now? |
38036 | Why could n''t you make a compass out of a strip of plastic? |
38036 | Why? |
38036 | Would n''t you like to have electrician''s tools all handy, ready for use, and know how to use them properly? |
38036 | [ Illustration: Figure 1 Tying an Underwriter''s Knot][ Illustration: Figure 2 Disassembled Light] What Did You Learn? |
38036 | [ Illustration: Figure 3( Socket and Switch Assembly)] What Did You Learn? |
38036 | _ How Much Will You Use?_ Now that you know the wattage of the appliance, multiply this figure by number of hours the equipment operates in one day. |
38036 | ______ How many are less than one- horsepower? |
38036 | ______ How many motors need regular oiling or grease? |
38036 | ______ On the farm? |
33504 | And after what manner are they inflected to make those Fringes? |
33504 | And among such various and strange Transmutations, why may not Nature change Bodies into Light, and Light into Bodies? |
33504 | And considering the lastingness of the Motions excited in the bottom of the Eye by Light, are they not of a vibrating nature? |
33504 | And do not hot Bodies communicate their Heat to contiguous cold ones, by the Vibrations of this Medium propagated from them into the cold ones? |
33504 | And do not the Motions once excited continue about a Second of Time before they cease? |
33504 | And do not the Vibrations of this Medium in hot Bodies contribute to the intenseness and duration of their Heat? |
33504 | And do not the three Fringes of colour''d Light above- mention''d arise from three such bendings? |
33504 | And doth it not readily pervade all Bodies? |
33504 | And in general, is it not from the same Principle that Heat congregates homogeneal Bodies, and separates heterogeneal ones? |
33504 | And is it not( by its elastick force) expanded through all the Heavens? |
33504 | And is not this Medium exceedingly more rare and subtile than the Air, and exceedingly more elastick and active? |
33504 | And may not its resistance be so small, as to be inconsiderable? |
33504 | And what else is a burning Coal than red hot Wood? |
33504 | And when a Man by a stroke upon his Eye sees a flash of Light, are not the like Motions excited in the_ Retina_ by the stroke? |
33504 | And why does not common Salt, or Salt- petre, or Vitriol, run_ per Deliquium_, but for want of such an Attraction? |
33504 | Are not all Hypotheses erroneous which have hitherto been invented for explaining the Phænomena of Light, by new Modifications of the Rays? |
33504 | Are not all Hypotheses erroneous, in which Light is supposed to consist in Pression or Motion, propagated through a fluid Medium? |
33504 | Are not the Rays of Light in passing by the edges and sides of Bodies, bent several times backwards and forwards, with a motion like that of an Eel? |
33504 | Are not the Rays of Light very small Bodies emitted from shining Substances? |
33504 | Are there not other original Properties of the Rays of Light, besides those already described? |
33504 | Do not the Rays of Light in falling upon the bottom of the Eye excite Vibrations in the_ Tunica Retina_? |
33504 | For what else is a red hot Iron than Fire? |
33504 | Have not the Rays of Light several sides, endued with several original Properties? |
33504 | How came the Bodies of Animals to be contrived with so much Art, and for what ends were their several Parts? |
33504 | How do the Motions of the Body follow from the Will, and whence is the Instinct in Animals? |
33504 | If it be asked, what then is their Cause? |
33504 | Is not Fire a Body heated so hot as to emit Light copiously? |
33504 | Is not Flame a Vapour, Fume or Exhalation heated red hot, that is, so hot as to shine? |
33504 | Is not this Medium much rarer within the dense Bodies of the Sun, Stars, Planets and Comets, than in the empty celestial Spaces between them? |
33504 | Was the Eye contrived without Skill in Opticks, and the Ear without Knowledge of Sounds? |
33504 | Whence is it that Nature doth nothing in vain; and whence arises all that Order and Beauty which we see in the World? |
33504 | and are not these Vibrations propagated from the point of Incidence to great distances? |
33429 | Has meteorology made such progress? |
33429 | Have not the''American Association for the Advancement of Science''arrived at some definite and sound conclusion upon the subject? |
33429 | How, then, did you acquire the information you seem to possess? |
33429 | I have,he says,"long held the proper inquiry to be,_ what are storms_? |
33429 | I must understand this,said he;"how is it?" |
33429 | Long cold snap,we exclaim;"how long will it last?" |
33429 | Now, what is that? |
33429 | Shall I have fair weather now till I get home? |
33429 | Again, where are the_ upper regions_, from which the lateral overflow takes place? |
33429 | And all this without any relation, whatever, to the contiguity of the oceans? |
33429 | And now, what is the explanation of all this? |
33429 | Are all these the result of simple evaporation, ascent to a colder region, condensation, and descent again? |
33429 | Are they in fact so drawn? |
33429 | But further still, what heating and ascending process is it that makes the variable winds north of the tropics? |
33429 | But of what kind? |
33429 | But what says Burnes respecting the winds of this part? |
33429 | But what_ power_ impels the winds, which thus meet at these points? |
33429 | But which is the stronger force? |
33429 | But why does he say this_ covers the storm_? |
33429 | Can any one believe they were successive rotary gales? |
33429 | Can he not arrange with a moderate lens, to move his engine with the rays of the summer sun? |
33429 | Can it be, you ask, that this driving wind is but an_ incident_ of the storm? |
33429 | Can the lateral tide, if there be one, affect the weather? |
33429 | Cumulus, broken stratus, patches of cirro- cumulus or cirro- stratus, or scud? |
33429 | Do the magnetic currents, passing upward with increased force, lift, elevate the atmosphere? |
33429 | Does any man believe that either current exists? |
33429 | Does it heat so fast as to_ keep up the ascensive force_ without intermission, at twenty- five, or twenty, or ten miles the hour? |
33429 | From whence, then, does it come? |
33429 | Gloomy from what? |
33429 | Has the earth any agency, and if so, what? |
33429 | Her interior deserts are extensive and intensely hot-- why are they rainless? |
33429 | How are they produced? |
33429 | How are they_ impelled_? |
33429 | How can a thaw come? |
33429 | How coming? |
33429 | If neither the ceiling nor floor of the chamber have any agency in producing it, what does? |
33429 | If so, how then can we explain the diurnal fall while magnetism is most active? |
33429 | If the latter, why a tendency to rotation from right to left? |
33429 | If the upper one, why is the interloper at the surface noted and quoted to prove what a storm is? |
33429 | In what manner does it act? |
33429 | Is it distinct from it, and if so, what is it doing there? |
33429 | Is it not then the agent? |
33429 | Is it then the attraction of magnetism which produces the barometric oscillations? |
33429 | Is not our air the same and our heat the same? |
33429 | Is that the ascensive force of air at 100 °? |
33429 | Is the true one always the upper one, and why? |
33429 | Is there such an agent? |
33429 | Is this vast suction found by the unlucky mariner who may be drawn within the vortex? |
33429 | Must it not be, at least, double that of the belt of calms, or the"great region of expansion,"as Professor Dove calls it? |
33429 | Nay, what shall be done with Professor Dove? |
33429 | Nay, would not gravity fill the second vacuum from_ above_, rather than from the south- west side? |
33429 | Now what occasioned this general depression of temperature, and local fall of snow? |
33429 | Or is it a mere mechanical effect of meeting,"coming into each other,"or"over- sliding?" |
33429 | Precisely so; but why carried away? |
33429 | She is not more timid than others; why does she invariably thus build? |
33429 | The belt of rains, formed by the currents of the two trades, threading their way through each other-- how are they produced? |
33429 | This brings us to the inquiry, how was it done? |
33429 | Upon_ what cause_ do these great central phenomena, so vast, so regular, so wonderful, depend? |
33429 | What do these gentlemen mean? |
33429 | What does Professor Dove mean by the term_ impulsion_, as applied to the winds? |
33429 | What is the ascensive power of an area of atmosphere of 100 °? |
33429 | What is the height of this expansion? |
33429 | What is the_ motive power_ of this connected atmospheric machinery, whose action and influence extend over the entire globe? |
33429 | What makes her"_ impulses_"differ from those of other birds, and always in the_ same manner_? |
33429 | What power placed it there, and for what purpose? |
33429 | What says Mr. Ericsson to this? |
33429 | What, then, is the ascension force of air at 100 °? |
33429 | Where is the great uprising suction during the prevalence of this extensive surface horizontal monsoon beneath it? |
33429 | Who dare belie The constant sun?" |
33429 | Who dare belie The constant sun?" |
33429 | Who shall we believe? |
33429 | Why do they not ascend? |
33429 | Why do they not have a_ vortex_, a_ monsoon_, or even a_ shower_? |
33429 | Why does it not ascend? |
33429 | Why draw only from under the central belt of rains? |
33429 | Why should the place where the currents thus pass through each other be a place of almost daily precipitation? |
33429 | Why should we be exempt? |
33429 | Why then is it rainless? |
33429 | Why? |
33429 | Would not such a fact be perfectly conclusive in any other science except theory- swathed meteorology? |
33429 | _ And the opposite is true every where upon the land._ How much hotter is the ocean and air under this supposed vortex? |
33429 | _ What, in short, is the power, and how is it exerted?_ To these questions, Mr. Redfield''s essays furnish no comprehensive answer. |
33429 | and not,_ how are storms produced_? |
33429 | and will not the air incline to rush in, to some or all these successive vacuums, from some other side than south- west? |
33429 | and, if so, why the preference of vacuums by the air, and_ when, where, and why_, should the_ successive vacuums stop_? |
33429 | fog, or stratus, or a stratum of scud, or what? |
33429 | not"How are storms produced?" |
33429 | or, have these deserts the power of selecting the quarter from which their vacuum shall be filled, and of delegating it to succeeding vacuums? |
33429 | or, that every one of them was not an interloping wind on which the true storm wind was superimposed? |
33429 | or, will it all voluntarily rush in, and leave a new complete vacuum? |
33429 | that brings in the warm air and fog of the Gulf Stream upon our_ snow- clad coast_, in mid- winter, to increase the January thaw? |
48041 | ( B) Is the attraction for outside bodies increased or decreased by placing the armature on H M? |
48041 | ( B) Withdraw E S. Do the leaves remain spread? |
48041 | ( C) Again, place a little piece of T P upon E C before lowering it upon E S. Do not touch E C, but bring your finger near T P. What does T P do? |
48041 | ( C) Repeat( A), and before removing E S, touch I T.( D) Remove your finger from I T, then withdraw E S. Do the leaves now remain spread? |
48041 | ( D) What is the result when a N pole of one is brought near a S pole of the other? |
48041 | ( D) With H P D touch T F B first( why? |
48041 | ( From your study of induction what should be the result?) |
48041 | ( Why?) |
48041 | 13) from one pole of H M. Do their lower ends attract or repel each other? |
48041 | 132 and 135 what can be said about the resistances of parallel circuits as compared with the resistances of the separate branches? |
48041 | 175? |
48041 | 31? |
48041 | Anything still happen to the copper? |
48041 | Are lines of force made to cut the turns of the coil? |
48041 | Are lines of force made to cut the turns of the coil? |
48041 | Are the filings_ simply_ pushed about? |
48041 | Are the leaves charged alike? |
48041 | As E S was-, what was the kind of a charge in L? |
48041 | As the earth acts like a huge magnet, having poles, lines of force, etc., will it magnetize pieces of iron which are in the air or upon its surface? |
48041 | As they were charged by contact, is the electrification on them+ or-? |
48041 | Can a current be produced by heat? |
48041 | Can a_ current_ of electricity in a conductor induce a_ current_ in another conductor not in any way connected with the first? |
48041 | Can current electricity produce effects through space? |
48041 | Can motion be produced by the electric current? |
48041 | Can they be reversed? |
48041 | Can this principle be used for practical purposes? |
48041 | Can we arrange our apparatus so that we can get some useful results from this action? |
48041 | Can we conduct from one place to another this peculiar state of things, this queer form of potential energy which we call electrification? |
48041 | Can we give some of its magnetism to another piece of steel? |
48041 | Can we have our charged body in one place and get attractions or repulsions at some other place? |
48041 | Can we not, then, use the needle to study the lines of force about wires and coils? |
48041 | Can we pass the magnetism along from one piece of steel to another? |
48041 | Can we reverse this process? |
48041 | Can we use this to charge a second condenser? |
48041 | Can we_ slowly_ discharge E C, or discharge it without sounds? |
48041 | Can we_ twist_ it into a wire and out again without the use of magnets? |
48041 | Can you devise an experiment to prove that metals may be charged? |
48041 | Can you easily pick it up? |
48041 | Can you explain why they did not detect any electrification on metals? |
48041 | Can you get the needle back to the first reading? |
48041 | Can you now determine, beforehand, how the poles of the needle magnet will be arranged? |
48041 | Can you now see why the needle did not remain horizontal after its poles were changed? |
48041 | Can you think of any method by which_ two N poles_ can be made in one piece of steel? |
48041 | Can you think of any reason for this? |
48041 | Could any use be made of such a motion, if it were on a large scale? |
48041 | Could it be made to run a machine? |
48041 | Did any electrification go to the electroscope from E S? |
48041 | Do any filings cling to A? |
48041 | Do lines of force still pass through the armature? |
48041 | Do the electromagnets attract or repel each other? |
48041 | Do the filings arrange themselves as in the case of permanent magnets? |
48041 | Do the lines of force flow from one N pole directly to the N pole of the other? |
48041 | Do the lines of force from the opposite poles attract or repel each other? |
48041 | Do the particles of filings reaching out from one B M attract or repel those from the other B M? |
48041 | Do these become charged? |
48041 | Do they attract or repel each other? |
48041 | Do two charged bodies_ always_ repel each other? |
48041 | Do we expect this of a man or horse? |
48041 | Do you feel anything unusual? |
48041 | Do you know how to find out? |
48041 | Do you know how to make the needle softer? |
48041 | Do you now see why a silk thread was used to make the carbon electroscope? |
48041 | Do you now see why it is necessary, to get good results, to have the paper, glass, etc., hot before electrifying them? |
48041 | Do you see any relation between a non- electric and a conductor? |
48041 | Does B F B continue to be attracted by E C? |
48041 | Does G, which has an opposite charge to the electroscope, make L diverge more or less? |
48041 | Does a change in internal resistance affect the strength of the current? |
48041 | Does any induced current pass through A G when the core is held still in the coil H, even though a current passes through coil E? |
48041 | Does anything occur now at the surface of the anode? |
48041 | Does heat increase or decrease the resistance of a copper wire? |
48041 | Does it pass through A G in the same direction as that which came directly from the two cells? |
48041 | Does one cell oppose the other? |
48041 | Does some of the current pass through A G? |
48041 | Does the armature make one click, as in the telegraph sounder, or does it vibrate rapidly? |
48041 | Does the coil seem to have poles? |
48041 | Does the current seem stronger when the plates are moved? |
48041 | Does the magnetic needle always come to rest about parallel to the lines of filings? |
48041 | Does the needle jump suddenly when the current passes? |
48041 | Does the needle move more or less than before? |
48041 | Does the needle remain deflected after the motion ceases? |
48041 | Does the needle remain deflected? |
48041 | Does the needle remain horizontal? |
48041 | Does this coil act like a magnet, having poles, magnetic field, etc.? |
48041 | From results obtained do you see any relation between the strength of the current and the number of pairs? |
48041 | Has its S pole been reversed? |
48041 | Has its magnetism become weaker or stronger than before? |
48041 | Has the Cu plate been acted upon? |
48041 | Has this combination a strong or weak pointing- power? |
48041 | Has this strengthened or weakened the poker magnet? |
48041 | How can any magnetism in the needle be removed? |
48041 | How can two condensers be joined to get the advantages of a large surface? |
48041 | How does the potential of this point compare with that of M P? |
48041 | How does this quotient, or ratio, compare with that found in part( C)? |
48041 | If a current is produced, does it pass from the coil in the same direction as before, in( C)? |
48041 | If a current is produced, in which direction does it flow from the coil? |
48041 | In the same or opposite direction? |
48041 | In( C) what became of the charge in L? |
48041 | Is W N still repelled? |
48041 | Is any current induced in H by a steady current in E? |
48041 | Is copper still deposited? |
48041 | Is dry silk a conductor? |
48041 | Is it possible that the box, T B, was polarized, being in the electric field of E C? |
48041 | Is it possible that there are different kinds of electrifications? |
48041 | Is it still repelled by T B after E C is removed? |
48041 | Is the E end of the coil a N or a S pole? |
48041 | Is the N pole of the needle deflected in the same direction as it was in( A)? |
48041 | Is the charge on the glass exactly like that on the ebonite? |
48041 | Is the copper deposited as rapidly as before? |
48041 | Is the current as strong with small plates as with large plates when the external resistance is small? |
48041 | Is the current constant or temporary? |
48041 | Is the current produced in the same direction as that from( B)? |
48041 | Is the needle deflected about the same number of degrees as in( A)? |
48041 | Is the needle deflected more or less than it was when the wire simply passed over or under it once? |
48041 | Is the point a N or a S pole? |
48041 | Is the steel brittle? |
48041 | Is the strength of the current greatly affected by_ slight_ changes in the internal resistance when the external resistance is large? |
48041 | Is the top N or S, when the current enters the coil at O E? |
48041 | Is there an electromagnetic induction? |
48041 | Is there any motion produced in H? |
48041 | Questions.=_ Will two pieces of electrified glass repel each other? |
48041 | Should it pass from C to M P or the reverse? |
48041 | The pointing power( § 25) of such a magnet is very slight; would it have_ any_ pointing power if we could make the end poles of equal strength? |
48041 | This cuts the cells out of the circuit; but, if you desire, also remove wire 3 from M P. Does the storage cell, S C, produce any current? |
48041 | What do they show? |
48041 | What does the experiment show? |
48041 | What effect has it upon the polarity of the E end of the coil? |
48041 | What effect has the acid? |
48041 | What effect, if any, has a charged body upon an insulated conductor_ before_ they touch each other, and before any spark passes to the conductor? |
48041 | What happens to the little pieces? |
48041 | What is learned from the results of( A) and( B)? |
48041 | What is the relation between the area of cross- section of a wire and its resistance? |
48041 | What is the relation between the length of a wire and its resistance? |
48041 | What is the relation, then, between the size( area of cross- section) of a wire and its resistance? |
48041 | What position would the needle take if we should hold it directly over the earth''s N magnetic pole? |
48041 | What should the carbon do? |
48041 | What takes place? |
48041 | What would happen if we could cut into T B at the middle with an insulated knife while it is polarized by E C? |
48041 | Which has the greater resistance? |
48041 | Which should be the more easily magnetized? |
48041 | Why do nails cling more strongly to the core than filings after the circuit is broken? |
48041 | Why do the lines of force appear indistinct in the center of the ring and around it? |
48041 | Why do they fasten telegraph wires to glass insulators? |
48041 | Why does soft iron make a better core than steel for electromagnets? |
48041 | Why is the motion produced much larger than that given by a hollow coil? |
48041 | Why? |
48041 | Will the small end of the core attract both poles of the compass- needle, or is it slightly magnetized? |
39566 | And can you, my young friends, be careless about your own salvation while Samuel is so anxious for you? 39566 And what is radiation?" |
39566 | And what, Mr. Hume, about the ice water? |
39566 | And, Mr. Wilton,asked Peter,"does not the Bible say that''God created all things for his own glory''?" |
39566 | Ansel, have you ever heard the''dew point''spoken of? |
39566 | Ansel, will you state the theories which have been held touching the nature of heat? |
39566 | Are you becoming discouraged and almost ready to give up all effort to follow Christ? |
39566 | Are you unwilling to come to him-- to trust him and submit to him? |
39566 | Are your thoughts and feelings and opinions about Christ and salvation the same as they were six weeks ago? |
39566 | But by what agency does man achieve the mastery of Nature? 39566 But can you wholly get rid of the conviction that the Bible is the word of God, written by holy men inspired by the Holy Spirit?" |
39566 | But how does this carry heat from the warmer region to the colder regions around? |
39566 | But how would it please you if my talk upon the ministry of pain should prove to be very much like a sermon? |
39566 | But were you not interested and pleased with the discourse? 39566 But what did you mean? |
39566 | But why do you say, of course? 39566 But would not all these natural agencies subserve essentially the same ends in the discipline of unfallen and sinless beings? |
39566 | But, Samuel, did you not pray for Mr. Hume also, and talk with him? |
39566 | But,said he,"does not the book of Nature-- your Bible, as you call it-- have something to say of God? |
39566 | Can you tell us, Ansel, whether the earth receives heat from the moon and stars? |
39566 | Can you tell us, Peter, why tubs of water set in a cellar should have this effect? |
39566 | Can you tell why a newspaper spread over a tomato vine keeps the frost from the vine? |
39566 | Did you ever think, Ansel, that you were very ambitious? |
39566 | Did you expect a month ago that at this time you would be feeling and acting as you now feel and act? |
39566 | Do not men heat and burn bricks, not to soften them, but to harden them? |
39566 | Do you believe that Christ is able to save you? |
39566 | Do you believe that he is willing to save you? |
39566 | Do you know what is meant by it? |
39566 | Do you look upon this irregular expansion and contraction of water,asked Mr. Hume,"as a real exception to the rule that heat expands bodies?" |
39566 | Do you wish now that you had fought it through, as you proposed, and kept all your feelings to yourself? |
39566 | Have not you, Mr. Hume, been treating Christ and the Holy Spirit as Samuel feared that you would treat him? |
39566 | Have you ever noticed whether cloudy nights or clear nights are the warmer? |
39566 | Have you no more enjoyment in reading the Scriptures and in your prayer in secret than you had a week ago? |
39566 | How could the dew fall upon the under side? |
39566 | How could we tell,asked Peter,"without knowing what kind of work the machine was designed to do?" |
39566 | How does the form of the earth operate to produce inequality of temperature? |
39566 | How is water formed from these two gases? 39566 How would such a plan please the other members of the class?" |
39566 | I am glad to hear that; but can you tell how they are different? |
39566 | I want to ask,said Peter,"how this internal heat came to exist, and how it is maintained?" |
39566 | If I understand you, then,he said,"you would like a course of lessons in the teachings of Nature?" |
39566 | In this bountiful supply of heat to warm the earth and serve human needs must we not see a kind design on the part of the Creator? 39566 Perhaps,"he continued,"you would prefer to study one of the historic books of the Old Testament?" |
39566 | Peter, what is the third method by which heat passes from place to place? |
39566 | Samuel, what is the cause of day and night? |
39566 | That is the old and common expression, but what is meant by latent heat? |
39566 | Upon what does the dew point depend? |
39566 | Was your answer correct, then? |
39566 | We use heat also in cooking our food,spoke up Peter:"is it not because heat destroys the cohesive attraction, and thus softens it?" |
39566 | What answer did you try to give him, Ansel? |
39566 | What are some of those means for transferring heat which seem to you to operate the same in the annual as in the daily changes of temperature? |
39566 | What book can you find which is true if the Bible is not true? |
39566 | What do you mean, Ansel? |
39566 | What do you think it is that hinders your coming into light and joy as others have done? |
39566 | What do you wish? |
39566 | What have you been reading, Ansel, that has put such thoughts into your mind? |
39566 | What have you tried to do for Christ? |
39566 | What is cohesive attraction? |
39566 | What is combustion? |
39566 | What is it, Ansel? |
39566 | What is meant by convection of heat? |
39566 | What is meant, Ansel, by the''conduction''of heat? |
39566 | What is that heat called, Ansel, which is absorbed by a body with no rise of temperature? |
39566 | What is that inequality of temperature which is produced by the shape of the earth? |
39566 | What is the cause of the sun''s heat? |
39566 | What is the evidence,asked Samuel,"that the dynamic theory of heat is true?" |
39566 | What is the third great natural source of heat? 39566 What leads you,"asked Mr. Wilton,"to present yourself to the church, asking for baptism?" |
39566 | What will you say, Peter? |
39566 | Why did you stand upon a rock? |
39566 | Will you correct your answer? |
39566 | Will you not tell us,said Samuel,"how these ocean currents are produced? |
39566 | Will you please explain this? |
39566 | Will you please tell us, Mr. Wilton, how this weakening of cohesive attraction is explained upon the dynamic theory of heat? |
39566 | Would it be wise and well to take no account of foreseen events? 39566 ''And who are these lads and young men for whom all this work and wisdom is expended?'' 39566 ''Can the Ethiopian change his skin or the leopard his spots? 39566 ''Pray, sir,''he says to the master,''what is this strange contradictory institution?'' 39566 ''What must I do to be saved?'' 39566 --_Youmans._What is the second method by which heat passes from place to place?" |
39566 | 30:"Sirs, what must I do to be saved?" |
39566 | A hundred times a day the questions came, What if there be a God who holds me responsible? |
39566 | A self- righteous young man came to Jesus asking,''Good Master, what good thing shall I do that I may inherit everlasting life?'' |
39566 | Ansel, have you studied geology?" |
39566 | Ansel, how shall we explain this?" |
39566 | Ansel, what part of the atmosphere is warmest?" |
39566 | Are there different conditions and different duties required of different men? |
39566 | Are they mixed together as oxygen and nitrogen are mingled in the air, or are they chemically united?" |
39566 | Are we to suppose that the column of heated air reaches to the top of the atmosphere?" |
39566 | Are you contented to live''having no hope and without God in the world''? |
39566 | Are you, Samuel, in your interest in studying Nature, forgetting Christ and the souls of men?" |
39566 | At length he thought,''Why should I not? |
39566 | But did God''s plan excuse his treason against his Lord? |
39566 | But does it seem reasonable that the world was designed merely as a place of punishment for men by reason of their wickedness?" |
39566 | But does not that condensation which forms the cloud- ring set free latent heat, and thus intensify the great heat of the equator? |
39566 | But here two questions arise: What is the glory of God? |
39566 | But how is the weight raised? |
39566 | But how shall we know the object for which God made and governs the world?" |
39566 | But if the casket be so worthy, what shall be said of the gem which is enshrined within? |
39566 | But what did you learn last Sunday?" |
39566 | But what is one iceberg to the thousands which drift yearly from the frigid zones toward the tropics? |
39566 | But what is the Gulf Stream, though it be fifty fold greater than all the rivers of the world, in comparison with the whole sum of the ocean streams? |
39566 | But what is the question which you wished to propose?" |
39566 | But what is the question?" |
39566 | But what is the setting for this gem? |
39566 | But what kind of evidence am I to look for?" |
39566 | But whence comes the force necessary to accomplish this? |
39566 | But whence comes the heat of combustion? |
39566 | But why do not the glowing rays of the sun raise the temperature at once to the highest possible point? |
39566 | But why do not the vegetables begin to freeze as soon as the water?" |
39566 | But why not endow living creatures with nerves of sensation which could experience pleasure, but could not feel pain? |
39566 | But why should not God embrace in his plan that great event, the fall of man, which he foresaw in the future? |
39566 | Can you blot out your past sins? |
39566 | Can you change that condemnation by your feeble, fickle resolutions to reform? |
39566 | Can you erase the record which stands written in the book of remembrance on high? |
39566 | Can you not now tell why water is incombustible?" |
39566 | Can you tell us, Ansel, how the temperature of the earth is affected by the atmosphere?" |
39566 | Can you tell us, Peter, at what season of year the earth is nearer the sun?" |
39566 | Could his late repentance call them back to life and hope? |
39566 | Did Mr. Hume say that what he calls''The book of Nature''contradicts the sacred Scriptures?" |
39566 | Did the Creator then''Bid his angels turn askance The poles of earth twice ten degrees and more From the sun''s axle''? |
39566 | Did this plan touching Christ make the apostasy of man a necessity? |
39566 | Did you ever see barefoot boys running in the cold dew stop and stand upon a stone or rock to get their feet warm?" |
39566 | Did you not carry the same idea of being chief into your plans and expectations for the future? |
39566 | Do all bodies conduct heat with equal rapidity?" |
39566 | Do clouds tend to produce inequalities of temperature?" |
39566 | Do n''t you remember how he used to laugh at the idea of being plunged in the river in honor of a dead man? |
39566 | Do not men produce by cultivation better fruits and vegetables than Nature ever grows when left to herself?" |
39566 | Do not the laws of Nature bring suffering to the good and the bad alike, and happiness also to all classes of men? |
39566 | Do not the works of Nature tell of the same God whose being and character were preached to us yesterday from the Holy Scriptures?" |
39566 | Do you know, Ansel, how to ascertain the dew point at any time?" |
39566 | Do you really and honestly wish to be saved from sin? |
39566 | Do you remember what was said about the production of cold by expansion and of heat by compression?" |
39566 | Do you think that my long trial of doubt and unrest and pain of heart can ever be blessed to my good?" |
39566 | Do you wish to study the evidences of the truth and inspiration of the Holy Scriptures?" |
39566 | Does Nature punish those whom you call the wicked? |
39566 | Does Nature reward the righteous? |
39566 | Does any one think of another cause of inequality of temperature?" |
39566 | Does it not mean that he made the world so good and perfect that all creatures ought to praise him on account of it?" |
39566 | Does it not speak of an infinitely wise and good Creator and Governor? |
39566 | Does that seem to you to be true, Samuel?" |
39566 | Does the temperature rise in any place? |
39566 | Does the world seem as if fitted up to be the dwelling- place of holy beings?" |
39566 | During the past few weeks you have heard others asking,''What shall we do to be saved?'' |
39566 | Have you never heard of setting tubs of water in cellars to keep vegetables from freezing?" |
39566 | Have you succeeded in getting rid of your sins? |
39566 | He could only cry out in astonishment,''Father, why am I, thine obedient son, thus smitten?'' |
39566 | How are we to combine these two sets of arrangements in our thinking?" |
39566 | How can God make his frown felt except by looking pain, so to speak, into the sinner''s conscience? |
39566 | How could it be otherwise? |
39566 | How is carbon brought into this state of suspense, waiting to dash upon oxygen and develop heat? |
39566 | How is this accomplished? |
39566 | How is this diurnal change of temperature alleviated?" |
39566 | How is this provision for suffering in man and in all sentient creatures consistent with the benevolence elsewhere shown? |
39566 | How much heat is given out in the freezing of water?" |
39566 | How shall their motions be explained? |
39566 | How shall we estimate the strength of this force? |
39566 | How were you interested in the sermon?" |
39566 | How would that affect the rate of radiation from the earth?" |
39566 | How would you apply this principle to the subject we are now considering? |
39566 | Hume?" |
39566 | Hume?" |
39566 | Hume?" |
39566 | Hume?" |
39566 | Hume?" |
39566 | Hume?" |
39566 | If Nature and Nature''s God have blessings in store for the willing and the obedient, why should not I know this and receive my share?" |
39566 | If a second example were made of a second ungodly city, would the expression of divine wrath be weakened? |
39566 | If, however, you want something else than the salvation which Jesus gives, what can you expect but perplexity, difficulty, darkness? |
39566 | Is it a new and original generation of heat, or is it merely a transfer? |
39566 | Is it because it evaporates before it reaches a sufficiently high temperature?" |
39566 | Is it not reasonable to believe that he designed it for their use? |
39566 | Is it wrong to wish for such an experience?" |
39566 | Is that so?" |
39566 | Is this plain to you, Ansel, and does it seem reasonable?" |
39566 | Is this possible? |
39566 | Is your happiness here and hereafter more important to Samuel than to yourselves?" |
39566 | Jesus has gone to prepare mansions for those who will, as he foresees, believe in him: why not make provision for foreseen evils also? |
39566 | Mr. Hume, can you suggest any method by which we can estimate the amount of heat which is carried north and south by the return trades?" |
39566 | Mr. Wilton proposed the question to the class:"What shall be our next course of lessons? |
39566 | Must he, then, after having caught a glimpse of life and joy, be cut off from hope and be driven from God for ever? |
39566 | No one else answered, and finally Mr. Hume said:"I suppose, of course, that you refer to the land and sea breezes?" |
39566 | On the other hand, when the sun sets and his heat is withdrawn, why does not the temperature fall suddenly to the lowest possible point? |
39566 | Ought we to believe that God planned the world for an object for which it never has been and never will be employed? |
39566 | Perhaps you will tell us what seems to you to be that object? |
39566 | Peter, have you ever seen a coal- pit? |
39566 | Plant a grain of corn in midwinter: why does it not germinate and grow? |
39566 | Samuel, what is a third cause of unequal temperature?" |
39566 | Samuel, will you name the second chief source of heat?" |
39566 | Shall we from the burden flee? |
39566 | Some even ventured to approach Mr. Hume himself with their raillery:"What do you think now of being dipped in the river in honor of a dead man?" |
39566 | The Creator foresaw the fall of man; is there no objection to the supposition that, knowing that man would sin, God made no provision for it? |
39566 | The young man answered,''All these have I kept from my youth up; what lack I yet?'' |
39566 | Then Ansel spoke up:"Mr. Wilton, why can we not study something which we know to be true?" |
39566 | Was it merely an accident that the dove was fitted to become the emblem of purity and of the Holy Spirit? |
39566 | Was not this so?" |
39566 | What care could give him knowledge of the qualities of all natural substances, that he might avoid their dangerous properties? |
39566 | What carefulness could guard against the tornado on the land, or the hurricane and the cyclone upon the sea? |
39566 | What could his confession do for the young men already, perhaps, among the lost through his influence? |
39566 | What did he mean by that, Samuel?" |
39566 | What does man need besides scope and reward for exertion? |
39566 | What effect, Peter, has the unevenness of the earth''s surface upon temperature?" |
39566 | What if Christ be the Son of God? |
39566 | What if a third example be made of a third city? |
39566 | What if every wicked city is made an example? |
39566 | What if hydrogen were put in the place of nitrogen? |
39566 | What if some other equally active element were mingled with oxygen to form the atmosphere? |
39566 | What if there be a future life and a judgment day? |
39566 | What if, in place of nitrogen, vapor of sulphur were substituted? |
39566 | What is another cause of inequality of temperature?" |
39566 | What is meant by this? |
39566 | What is that?" |
39566 | What is the chief form of this which is used for the production of heat? |
39566 | What is the general principle touching the effect of heat upon bodies?" |
39566 | What is the meaning of this? |
39566 | What is understood, Ansel, by this term, specific heat?" |
39566 | What need is there of a creator? |
39566 | What power should save him from the bursting of the volcano and the jaws of the earthquake? |
39566 | What shall I render unto the Lord for all his benefits? |
39566 | What was a confession in comparison with the ruin he had caused? |
39566 | What will be the end of his groping in darkness? |
39566 | What would be the effect, Ansel, if the atmosphere were as warm, or warmer, at the top than at the surface of the earth? |
39566 | What, Mr. Hume, do you think the effect would be upon creatures such as we all know men to be?" |
39566 | When radiant heat falls upon a body, what becomes of it?" |
39566 | Which will encourage the larger manliness and nurture the higher culture and strength? |
39566 | Who can prove that the universe did not exist from eternity? |
39566 | Who should stand sentinel against the unseen poison borne upon the wings of the wind? |
39566 | Who will mention another method by which heat is economized?" |
39566 | Who will suggest it?" |
39566 | Who will tell us?" |
39566 | Why does not the dew-- for frost is nothing but dew frozen as it forms-- come upon the under side of the paper?" |
39566 | Why is this, Samuel?" |
39566 | Why not give up my own will? |
39566 | Why not pray that God''s will may be done?'' |
39566 | Will some one explain this?" |
39566 | Will some one mention some of the general methods by which the waste of heat is prevented?" |
39566 | Will some one now state the manner in which the dynamic theory of heat explains this expansion?" |
39566 | Will some one suggest what this agency is?" |
39566 | Will you bolt the door? |
39566 | Will you not come to him? |
39566 | Will you not trust his promises and commit yourselves to his hands to be saved? |
39566 | Will you tell us, Peter, the first and chief of these effects?" |
39566 | Will you tell us, Samuel, how winds are caused?" |
39566 | Will you tell us, Samuel, the first adjustment or arrangement upon which the temperature of the earth depends?" |
39566 | Will you, Mr. Hume, suggest one of the general arrangements for the economical use of heat?" |
39566 | Wilt thou not bow their pride of heart and turn their wills and make their hearts tender, gentle, and believing? |
39566 | Wilt thou not draw them to thyself? |
39566 | Wilt thou not smite the rock, and cause the waters of penitent grief to flow? |
39566 | With these machines before you, could you tell me whether the inventor were a wise and skillful machinist?" |
39566 | Would God forgive and raise to heavenly heights a man who had dragged others down to hell? |
39566 | Would it be possible that Christ should fill his soul with blessedness while his victims were drinking the wine of the wrath of God? |
39566 | Would it have been wiser and better to leave out of account that most stupendous fact in the history of the human race? |
39566 | Would that seem to be a fitting employment for the sinless children of the all- loving Father? |
39566 | Would you be satisfied to have a commonplace experience, such as thousands of others have, which would attract no special notice? |
39566 | Would you like to study one of the Epistles-- the Epistle to the Romans or that to the Hebrews?" |
39566 | Yet, taken as a whole, can one doubt that variety of climate and change of temperature are of advantage to man? |
39566 | You cry out,''Men and brethren, what shall we do?'' |
39566 | and Peter''s answer,"Lord, to whom shall we go? |
39566 | and the lion, of strength and regal state? |
39566 | and, What is it for God to glorify himself by his works of creation and government? |
39566 | he asked;"do you think Genesis less trustworthy than the Epistle of Paul?" |
39566 | the ant, to be the type of prudent industry? |
39566 | the horse, of spirit and daring? |
39566 | the lamb, to be the emblem of gentleness, of Christ the gentle Sufferer, and of his suffering people? |
22156 | A cyclone? |
22156 | About how high could we make this kite go, sir? |
22156 | Ah write it? 22156 Ai n''t I asking you to?" |
22156 | Ai n''t time, jest time, all over? |
22156 | All clouds are fogs, sir? |
22156 | All for our own? |
22156 | All those observations are sent to Washington, are n''t they, sir? |
22156 | An''the courts have a ruling that weather records is evidence? |
22156 | An''what''s a Kraker- something sunset? |
22156 | And I suppose you think I told you to? |
22156 | And around noon- time? |
22156 | And barometers like mine? |
22156 | And can you always tell what the weather is like, all over the country? |
22156 | And did n''t you? |
22156 | And even if the person you help is never going to be able to do you any good, why, that''s all the more reason for helping, is n''t it? |
22156 | And have they all got rain gauges like mine? |
22156 | And if the basket were sixty feet high, as high as a barn? |
22156 | And in the evening? |
22156 | And was that the way that you lads figured out that my fruit was likely to be frozen? |
22156 | And what is the present velocity? |
22156 | And where are the others? |
22156 | And where does the cold wave come in? |
22156 | And why does that crackle? 22156 And wind- measurers, like my anemometer?" |
22156 | And you say the shooting was before half- past eight? |
22156 | And you went on working? |
22156 | Any of you boys coming my way? |
22156 | Anything wrong? |
22156 | Are n''t they dandies? |
22156 | Are n''t you going to tell him about the frost? |
22156 | Are they all here? |
22156 | Are they the best kites for lifting, sir? |
22156 | Are you ready? |
22156 | At any special distance, sir? |
22156 | Bad weather coming, is n''t there, Anton? |
22156 | Because water is denser than air? |
22156 | Build two- thirds of the whole two thousand miles by some underwater system, constructing the wall under water? 22156 But do many people get killed with lightning?" |
22156 | But do n''t you think he can draw? |
22156 | But does n''t anybody know why it rains? |
22156 | But does n''t it cost an awful lot? |
22156 | But how did they find that out? |
22156 | But how is that going to show the time? |
22156 | But suppose a wind comes up and blows the heat away? |
22156 | But suppose we do n''t get it just right? |
22156 | But the sunset colors, sir? |
22156 | But what has that got to do with the army, sir? |
22156 | But what''s the cause of ball- lightning? |
22156 | But why are they always so regular? |
22156 | But why does thunder make a noise? |
22156 | But why in the world should a hail- stone be made like an onion? |
22156 | But why, sir? |
22156 | Ca n''t we do it by hand? |
22156 | Can we, sir? |
22156 | Could an aeroplane get up there? |
22156 | Could n''t I hold one of those small kites, sir? |
22156 | Could n''t we interest some one else to do them, just to help the thing along? |
22156 | Dan''l,said the younger boy, reprovingly,"why do n''t you use that thick head of yours a little? |
22156 | Dead? |
22156 | Did anny one ever show you annything about printin''? |
22156 | Did n''t you? |
22156 | Did that follow a volcanic eruption, sir? |
22156 | Did you ever notice that there''s a little crack between each rail? 22156 Did you?" |
22156 | Directly opposite to the storm? |
22156 | Do I? 22156 Do n''t I have to run with it?" |
22156 | Do n''t you think that I ought to try to find Father first? |
22156 | Do you happen to know, though, Bert, what makes the colors of sunset? 22156 Do you reckon five seconds to a mile between the lightning and the thunder?" |
22156 | Do you suppose I''d rob him of the fun of telling you? 22156 Do you suppose he''s got three?" |
22156 | Do you suppose it''ll ever dry up, Ross? |
22156 | Do you suppose the Weather Bureau in Washington would make them for us and let us have a few copies? |
22156 | Do you suppose, sir,asked Tom,"that it would be safe to send up the kite? |
22156 | Do you think we ought to get mixed up in a thing like this? |
22156 | Do you want to go along? |
22156 | Does it look so bad? |
22156 | Does that depend on the wind? |
22156 | Every day? |
22156 | Going to fly them tandem? |
22156 | Going up, sir? |
22156 | Goliath, the strong man, the Flying Squirrel Brothers, Androcles, the lion tamer, Princess Tiny and the rest? |
22156 | Got the cup? |
22156 | Hail is electric, too, is n''t it? |
22156 | Have any of you boys thought at all about what''s going to happen to Anton, when he grows up? 22156 Have n''t you some scheme?" |
22156 | Have sun- spots anything to do with the weather, sir? |
22156 | Have you a long straight board? |
22156 | Have you seen a copy of our paper? |
22156 | Have you? |
22156 | Here? |
22156 | How about sheet- lightning? |
22156 | How am I going to get Lassie out? |
22156 | How can I tell them apart on a photograph plate, sir? |
22156 | How can it be anything else? |
22156 | How can you tell that? |
22156 | How could we get them made? |
22156 | How did he succeed? |
22156 | How did you get it, Dan''l? |
22156 | How did you get left behind, anyhow? |
22156 | How did you get out, then? |
22156 | How do you know? |
22156 | How do you know? |
22156 | How do you know? |
22156 | How does she make it? |
22156 | How have you been making it? |
22156 | How long is it, Ross? |
22156 | How many kinds of clouds does the Weather Bureau name? |
22156 | How many kites did they use? |
22156 | How many pairs of shoes have you got? |
22156 | How near? |
22156 | How was that? |
22156 | How''s that? |
22156 | How, Dan''l? |
22156 | How, Mr. Levin? 22156 How?" |
22156 | Howdy, Ross,came the greeting in reply,"all your folks safe?" |
22156 | I had n''t thought of it,Ross answered,"but it does seem as if he were up against it, does n''t it?" |
22156 | I''m not a bit sure,said Ross as he patted the dog,"whether it was Anton or the pups that you wanted me to rescue, eh? |
22156 | I''ve been wondering,said Anton, thoughtfully,"what makes snow- flakes take those shapes? |
22156 | I''ve been wondering,said Anton,"how you can find out that it''s so cold high up in the air if no one can live up there?" |
22156 | In the West Indies? |
22156 | Is it all right for to- day? |
22156 | Is it just the rain that makes floods? |
22156 | Is it right over my head, Dan''l? |
22156 | Is it steady or veering? |
22156 | Is it the difference between a good conductor and a bad one that makes people put up lightning- rods? |
22156 | Is n''t hail just frozen rain? |
22156 | Is thar more''n one kind of time? |
22156 | Is that high as compared with other countries? |
22156 | Is that the crack that makes a train bump? |
22156 | Is that why muggy days are so uncomfortable? |
22156 | Is the house still standing? |
22156 | Is there always a cyclone before a cold wave? |
22156 | Is there any place in the United States without clouds? |
22156 | Is this hyar another of your contraptions to tell what the weather''s goin''to be like the year after next? |
22156 | It has n''t knocked yet, Dan''l, has it? |
22156 | It settles in regular shapes, does n''t it? |
22156 | It''s evaporation that puts water into the air, is n''t it, sir? |
22156 | Just how does the Weather Bureau come in,asked Ross,"the rainfall?" |
22156 | Kites? 22156 Levin been talking to you about Anton, Bob?" |
22156 | Longer than the Amazon? |
22156 | Make a Weather Bureau of our own, Mr. Levin? 22156 Marooned? |
22156 | Mr. Levin,he said,"can you spare me for a bit? |
22156 | Now what was the temperature here yesterday morning, Anton? |
22156 | Of course,agreed Ross,"but what has that got to do with it?" |
22156 | One of the boys? |
22156 | Roads in the air? |
22156 | Scared, Anton? |
22156 | Sent it? |
22156 | So you did save it, eh? |
22156 | So, if you walked a long way east, you''d see the sun quicker, would n''t you? |
22156 | Suppose it were done, that way, Mr. Levin,put in Anton,"would that settle it all?" |
22156 | Suppose you could figure all those things out, could n''t you foretell the weather, then? |
22156 | Suppose you had a pea on your head, it would n''t be heavy to carry, would it? |
22156 | Suppose you sunk that wall, away down deep, below the level of the bottom of the river? |
22156 | That was the worst ever, was n''t it, sir? |
22156 | That''s what the dredges are for, is n''t it? |
22156 | The chap who used to be with the Weather Bureau, you mean? |
22156 | Then what are the fires for? |
22156 | Then what shall we do, sir? |
22156 | Then you think that heating an orchard will save the fruit? |
22156 | Then you were with him, were n''t you? |
22156 | There is, eh? |
22156 | There is? 22156 They do look pretty far apart, do n''t they?" |
22156 | They''re muddy, are n''t they? |
22156 | Thirty- four years,said the Forecaster thoughtfully;"that would be in 1883, would n''t it? |
22156 | Those are n''t the thunder clouds, sir, are they? |
22156 | To the eastward? 22156 Was it Rex who brought you here?" |
22156 | We can, ca n''t we? |
22156 | Well, boys,he said,"what are you after? |
22156 | Well, that''s prophesying, is n''t it? |
22156 | Well, what if he did? |
22156 | Well? |
22156 | Well? |
22156 | Well? |
22156 | Were n''t you afraid of being killed? |
22156 | What are St. Elmo''s fires? |
22156 | What are they, sir? |
22156 | What are those little balls? |
22156 | What are you going to build that wall on? 22156 What are you going to do with all the little streams that flow into the Mississippi? |
22156 | What are you going to do, Tom? |
22156 | What can a chap do? |
22156 | What could the rest of us do? |
22156 | What could we do? |
22156 | What do I do, sir? |
22156 | What do you mean, Anton? |
22156 | What do you suppose we can do? |
22156 | What do you want, coming to my house at this hour of the night? |
22156 | What does it look like? |
22156 | What fo''makes that shorter? |
22156 | What for? |
22156 | What in blazes are you trying to photograph? |
22156 | What is it, Dan''l? |
22156 | What is it? |
22156 | What kind of a job? |
22156 | What kind of a motto, sir? |
22156 | What on earth have you got there, Dan''l? |
22156 | What sort of things, sir? |
22156 | What time was the shooting? |
22156 | What was it this morning? |
22156 | What was that, Mr. Levin? 22156 What''ll you do?" |
22156 | What''s that contrivance you''ve got on your camera stand, anyway? |
22156 | What''s that got to do with weather? |
22156 | What''s the barometer? |
22156 | What''s the dew- point, sir? |
22156 | What''s the direction of the wind, Tom? |
22156 | What''s the good of that? |
22156 | What''s the good of that? |
22156 | What''s the highest flight that ever was made? |
22156 | What''s the idea of that? |
22156 | What''s up, Ross? |
22156 | What''s wrong? |
22156 | What- all happens to that yar hour? |
22156 | What? |
22156 | Where are you going, old boy? |
22156 | Where did it begin, sir? |
22156 | Where is he? |
22156 | Where will we get the wire? |
22156 | Where will you put it, boys? |
22156 | Where''s Rex now,queried Anton,"down in our old boat?" |
22156 | Whew,whistled the farmer,"and is that on its way here?" |
22156 | Which did you wear this afternoon? |
22156 | Who do you suppose drew them? |
22156 | Who is it? |
22156 | Who was that, sir? |
22156 | Who''d have thought o''that, now? |
22156 | Who''s that, sir? |
22156 | Who''s that? 22156 Who- all fixed it up that way?" |
22156 | Why did n''t you tell a fellow? |
22156 | Why do n''t you boys make it easy for him? |
22156 | Why do n''t you fix it so that you wo n''t have to measure the length of the shadow every day? |
22156 | Why do you? |
22156 | Why is annything blue? |
22156 | Why is it such a hard job? |
22156 | Why is it,asked the younger boy,"that there''s more rain one year than another?" |
22156 | Why not, Dan''l? |
22156 | Why not? |
22156 | Why were n''t we under bare poles,you asks? |
22156 | Why, Father? |
22156 | Why, sir? |
22156 | Why, sir? |
22156 | Why? |
22156 | Why? |
22156 | Why? |
22156 | Will that wire hold it, sir? |
22156 | Without any measuring as to length? |
22156 | Without you? |
22156 | Wo n''t you show us? |
22156 | Wondering if any one was going to come for you? |
22156 | Would we? |
22156 | Yes,Ross agreed, but uneasily, for he was watching the sky steadily,"but do you think we''ll ever be able to do it?" |
22156 | Yes? |
22156 | Yes? |
22156 | Yo''not fooling? |
22156 | You knew that the sun- dial is one of the official emblems of the United States? |
22156 | You know that printing- press of mine? |
22156 | You mean because CÃ ¦ sar is a negro? |
22156 | You mean both in summer and winter? |
22156 | You mean by smoking them? |
22156 | You mean her crystal? |
22156 | You mean that every day''s weather map is different? |
22156 | You mean the one you printed the pirate flags on, Fred? |
22156 | You mean to say that the weather at the North Pole and at the equator has anything to do with our weather here? |
22156 | You mean to say that there are different layers of wind? |
22156 | You mean, sir, that a red sunset and a gray sunrise really tell that the weather is going to be fine? |
22156 | You really want to know why rain comes? 22156 You spoke of the''roads in the air,''sir,"put in Ross,"how many are there?" |
22156 | You''re not hurt? |
22156 | You''ve got plenty of wind at your place, Lee, have n''t you? |
22156 | You''ve often heard the crackling of a near- by thunder compared to an irregular volley of rifles, have n''t you? |
22156 | Your temperature? |
22156 | --_Marine Journal._ THE BOY WITH THE U. S. MAIL How much do you know of the working of the vast and wonderful Post Office Department? |
22156 | Abner?" |
22156 | Again-- Why should n''t he? |
22156 | And the wind, Tom?" |
22156 | And what do you suppose the circus folk did?" |
22156 | And what was the wind, Tom?" |
22156 | And why does a bar of iron sink through water and not through earth?" |
22156 | And, Mr. Lovell, can I use the wireless for a minute?" |
22156 | And, talking of grub, Anton, are n''t you hungry?" |
22156 | Another man?" |
22156 | Are these like that?" |
22156 | As the only thing that would make them expand would be the heat, you could measure the heat that way, could n''t you?" |
22156 | As there would n''t be anywhere for it to go except through the tube, it would shoot up the tube, would n''t it?" |
22156 | Besides, Ross, where would you build this wall? |
22156 | Boys,"he said, breaking off suddenly,"why does a stick float in water when it falls in air?" |
22156 | But I do n''t quite see what he can do?" |
22156 | But do you know what mud is?" |
22156 | But how about a cold wave? |
22156 | But how can you- all tell when the rain began?" |
22156 | But is that always the same?" |
22156 | But who''s to have charge of the kite- flying?" |
22156 | But, look here, Anton, how are we going to get you out? |
22156 | CHAPTER III PUTTING THE SUN TO WORK"Fo''the land''s sake, Mistah Anton, what fo''yo''puttin''up that pole on the grass?" |
22156 | CHAPTER IV THE MASSACRE OF AN ARMY"Where''s the boss?" |
22156 | Ca n''t you tell what I brought you here for?" |
22156 | Can you and will you take it?" |
22156 | Can you figure that out in the same way?" |
22156 | Can you?" |
22156 | Dan''l, do you suppose there''s a pail of whitewash in the barn?" |
22156 | Did we pump without stoppin''? |
22156 | Did we stop? |
22156 | Did you happen to notice, Ralph, whether there was a halo round the sun when you took this?" |
22156 | Did you know that, Ross? |
22156 | Do n''t you have to pass an examination, or something?" |
22156 | Do you know how to do that?" |
22156 | Do you know, Bob?" |
22156 | Do you mind if I go ahead and see?" |
22156 | Do you see that layer of cirro- stratus clouds?" |
22156 | Does n''t that prove he could n''t have been out after the rain started?" |
22156 | First of all, why is the sky blue?" |
22156 | From what house in Galveston had this floated, to find a resting- place on the floor of an un- roofed and un- walled negro''s cabin? |
22156 | Had the boat suffered in the careening of the house? |
22156 | Has anything happened?" |
22156 | Have any of you ever seen a weather kite?" |
22156 | Have n''t you sometimes seen, after a cold night, a lot of needles shooting out from the sides from a puddle?" |
22156 | Have you any prints of them?" |
22156 | Have you enlarged your staff, Fred?" |
22156 | He had reached the house, but how was Anton to be rescued? |
22156 | How about it, Bob?" |
22156 | How about it, boys? |
22156 | How am I going to get it?" |
22156 | How cold?" |
22156 | How much weight of air do you suppose you''re carrying, Anton?" |
22156 | How would you reel the kite home? |
22156 | How''s that?" |
22156 | I suppose you think a cyclone is some kind of a whirlwind, a particularly violent storm, eh?" |
22156 | I suppose you''ve heard the story of the American sun- dial motto?" |
22156 | I wonder why?" |
22156 | I''ll send one of the roustabouts with you, if you like?" |
22156 | If most of the thunder storms travel from the west, where does this banging come in?" |
22156 | If you saw his house on fire, Fred, you would n''t hesitate to tell Jed Tighe, would you?" |
22156 | Is n''t there a rhyme about clouds and towers, Dan''l?" |
22156 | Is that clear?" |
22156 | Is that it?" |
22156 | Is that what you mean?" |
22156 | Is that you? |
22156 | It''s a little short, is n''t it?" |
22156 | Just how, sir?" |
22156 | Levin?" |
22156 | Levin?" |
22156 | Levin?" |
22156 | Levin?" |
22156 | Levin?" |
22156 | Levin?" |
22156 | Levin?" |
22156 | Levin?" |
22156 | Levin?" |
22156 | Levin?" |
22156 | Levin?" |
22156 | Levin?" |
22156 | Levin?" |
22156 | Like Franklin''s?" |
22156 | Man against the hurricane-- which would win? |
22156 | Now, boys,"he continued,"what kind of banks has the river around here, rock or earth?" |
22156 | Now, where''s that crutch?" |
22156 | On all sides of the''low''there is rain, and you remember how it rained here, yesterday morning, early?" |
22156 | On the ground?" |
22156 | Putting up a flag- pole? |
22156 | Reassured, Ross turned to his companion, and asked:"What makes tornadoes, Anton?" |
22156 | Right on the bank?" |
22156 | See?" |
22156 | Shall we try a flight to- day?" |
22156 | Should he venture? |
22156 | So, if you allow for sag and so forth, you''d have to put out eight or nine thousand feet of wire to reach a mile, would n''t you?" |
22156 | Somebody else in trouble, eh?" |
22156 | Stood there all by itself, sharply gleaming against the black ground-- What was that lying on the farther side of it? |
22156 | The clocks change four times in the United States, do n''t they, Ross?" |
22156 | The sun rises in the east, does n''t it?" |
22156 | The wind, Tom?" |
22156 | This was rather a poser, but finally Anton said slowly,"It''s a mixture of earth and water, is n''t it?" |
22156 | Tom, how''s the wind?" |
22156 | True, the great sea- wall had since been built to protect the town, but would it stand? |
22156 | Was the door into the hall open? |
22156 | Well, Tom, what is it?" |
22156 | What I''m thinking is this-- why could n''t Anton be taken in hand and taught to fit himself for the Weather Bureau? |
22156 | What are we going to do?" |
22156 | What are you after? |
22156 | What do you think we''d better do?" |
22156 | What is it?" |
22156 | What kind of a figure will that make?" |
22156 | What more proof could any one want? |
22156 | What wages do you want?" |
22156 | What was the wind going to be like? |
22156 | What was there that he could do? |
22156 | What was your temperature here the day before yesterday, Anton?" |
22156 | What''s more, Anton, you remember those two clowns in the show who were so funny?" |
22156 | What''s the rhyme about that, Dan''l?" |
22156 | When you get up in the morning, is n''t your shadow longer than it is in the middle of the day?" |
22156 | Where are the pups?" |
22156 | Where do you suppose your folks are?" |
22156 | Which of you is game to do it? |
22156 | Which was it?" |
22156 | Who else do you think would join in?" |
22156 | Who wrote it?" |
22156 | Who''ll volunteer?" |
22156 | Why do n''t ye make some color plates and give them as premiums for subscriptions?" |
22156 | Why do n''t you send him a copy of the_ Review_, Fred? |
22156 | Why does n''t it just gradually get dark as the sun goes down?" |
22156 | Why is it? |
22156 | Why is the air blue?" |
22156 | Why should he? |
22156 | Why? |
22156 | Will you teach me all about printing in a day and a half? |
22156 | Wo n''t you tell us the story?" |
22156 | Would the day be fine? |
22156 | Yo''did n''t see him, Anton?" |
22156 | You can see that wherever you narrow the banks, the river channel has got to be made deeper to accommodate the water, has n''t it?" |
22156 | You know in fairy tales that some trees are supposed to be wicked and other trees are supposed to be good?" |
22156 | You know the saying about the St. Lawrence, do n''t you?" |
22156 | You know what that is?" |
22156 | You know, boys, generally the land slopes down in the direction of the river, does n''t it?" |
22156 | You mean he was caught by the flood?" |
22156 | You''ve eaten barley- sugar from a string some time, have n''t you?" |
22156 | You''ve heard Bob''s big wireless outfit crackle, when he sends out a spark, have n''t you?" |
22156 | You''ve seen clouds going at different rates, have n''t you, Mr. Tighe, some fast and some slowly?" |
22156 | exclaimed one of the boys,"what has a sunset got to do with patriotism?" |
22156 | he added,"if you''re going down stream, just keep your eye on the levee, wo n''t you? |
22156 | he called, then, as the boy''s exhausted state became more evident,"what have you been doing? |
22156 | queried the lad eagerly,"and then?" |
36691 | 1, plate 11? |
36691 | 1, plate 12? |
36691 | 1, plate 13? |
36691 | 1, plate 15?) |
36691 | 1, plate 18? |
36691 | 1, plate 19? |
36691 | 1, plate 20? |
36691 | 1,--and how does it operate? |
36691 | 1. plate 10? |
36691 | 1. plate 2? |
36691 | 1. plate 3? |
36691 | 1. plate 6? |
36691 | 1. plate 7? |
36691 | 1. plate 9, designed to represent? |
36691 | 10) Can a liquid be said to be impenetrable? |
36691 | 10) Is the term_ matter_, restricted to substances of a particular kind? |
36691 | 10) What is intended by the term_ bodies_? |
36691 | 10) What is meant by impenetrability? |
36691 | 100) How does the sun then shine at the poles, and what is the effect on the days and nights? |
36691 | 100) How is the north pole inclined in the middle of our summer, and what effect has this on the north frigid zone? |
36691 | 100) In what direction does the north pole always point? |
36691 | 100) What is shown by the position of the earth at B, in the figure? |
36691 | 101) How does the sun appear at the poles, during the period of day there? |
36691 | 101) In what will the days and nights differ in the temperate zone, from those at the poles, and at the equator? |
36691 | 101) When the earth has passed the autumnal equinox, what changes take place at the poles, and also in the whole northern and southern hemispheres? |
36691 | 101) Why is the heat greatest within the torrid zone? |
36691 | 102) In proceeding from the vernal equinox to the summer solstice, what changes take place? |
36691 | 102) What takes place at the time of the vernal equinox, and what is meant by the term? |
36691 | 103) From what cause arises the superior heat of the equatorial regions? |
36691 | 103) Why should oblique rays afford less heat than those which are perpendicular? |
36691 | 104) What causes conspire to lessen the solar heat in the morning and evening? |
36691 | 104) What other cause lessens the intensity of oblique rays? |
36691 | 105) Do the fixed stars require the same time as the sun, to return to the same meridian? |
36691 | 105) How is this accounted for? |
36691 | 105) In 365 days, how many times does the earth revolve on its axis? |
36691 | 105) Is there any change of seasons in the other planets? |
36691 | 105) What is said respecting the axes of Jupiter, of Mars, and of Saturn? |
36691 | 106) How is this accounted for? |
36691 | 106) What is meant by the solar and the sidereal day? |
36691 | 106) What is the difference in time between them? |
36691 | 106) What is the length of the tropical year? |
36691 | 107) The solar year is completed before the earth has made a complete revolution in its orbit, by what is this caused? |
36691 | 107) What difference is there in the length of the solar and sidereal year? |
36691 | 107) Why can we not always ascertain the true time by the apparent place of the sun? |
36691 | 108) As the moon revolves round the earth, and also accompanies it in its annual revolution, in what form would you draw the moon''s orbit? |
36691 | 108) In what time does the moon revolve round the earth? |
36691 | 108) What would be the greatest difference between solar, and true time, as indicated by a perfect clock? |
36691 | 109) Can the earth be seen from every part of the moon, and will it always exhibit the same appearance? |
36691 | 109) What are the changes of the moon called? |
36691 | 109) What by her being full? |
36691 | 109) What by her being horned, and her being gibbous? |
36691 | 109) What by her third quarter? |
36691 | 109) What causes the moon always to present the same face to the earth, and what must be the length of a day and night to its inhabitants? |
36691 | 109) What is meant by her first quarter? |
36691 | 11) How can you prove that air is impenetrable? |
36691 | 11) How do we distinguish the terms height and depth? |
36691 | 11) If air is impenetrable, what causes the water to rise some way into a goblet, if I plunge it into water with its mouth downward? |
36691 | 11) In how many directions, is a body said to have extension? |
36691 | 11) When I drive a nail into wood, do not both the iron and the wood occupy the same space? |
36691 | 110) Are total eclipses of the sun frequent, and when they happen what is their extent? |
36691 | 110) By what are eclipses of the sun caused? |
36691 | 110) What causes eclipses of the moon? |
36691 | 110) What causes partial eclipses of the moon? |
36691 | 110) What is meant by her conjunction?--what by her being in opposition?--what by her quadratures? |
36691 | 110) What is meant by the moon''s nodes? |
36691 | 110) When the moon is exactly in one of her nodes, what length of time will she be eclipsed? |
36691 | 110) Why do not eclipses happen at every new and full moon? |
36691 | 111) How are lunar eclipses visible, and what is proved by their duration? |
36691 | 111) What does this prove respecting the size of the moon? |
36691 | 111) What remark is made respecting those planets which have several moons? |
36691 | 111) What use is made of the eclipses of the satellites of Jupiter? |
36691 | 112) By what other means may latitude be found? |
36691 | 112) From what is longitude reckoned? |
36691 | 112) How does the rotation of the earth upon its axis, govern the time at different places? |
36691 | 112) How is the latitude of a place usually found? |
36691 | 113) By what means may a captain find the time at London, and in the place where his ship may be? |
36691 | 113) How may the eclipses of Jupiter''s satellites be used to find the longitude? |
36691 | 113) What two circumstances, if known, will enable you to find your longitude from a given place? |
36691 | 114) By what are tides caused? |
36691 | 114) How will you know whether the longitude is east or west? |
36691 | 114) What is meant by the transit of a planet? |
36691 | 114) Why can we see transits of Venus and Mercury only? |
36691 | 114) Why is not a similar effect produced on the land? |
36691 | 115) In what two parts of the world is it high water at the same time? |
36691 | 115) What circumstances respecting the decrease of attraction are taken into account, in explaining the tides? |
36691 | 116) Has the sun any influence on the tides, and why is it less than that of the moon? |
36691 | 116) What by neap tides, and how are they caused? |
36691 | 116) What circumstances affect the time of the tide in rivers, bays,& c.? |
36691 | 116) What is meant by spring tides, and how are they produced? |
36691 | 117) Why are the tides three- quarters of an hour later every day? |
36691 | 117) Why in the open ocean, is it high water, some hours after the moon has passed the meridian? |
36691 | 118) From what is fluidity supposed to arise? |
36691 | 118) Into what two classes are fluids divided? |
36691 | 118) Of what do hydrostatics and hydraulics treat? |
36691 | 118) What are the two divisions of the science which treats of the mechanical properties of liquids? |
36691 | 118) What is a fluid defined to be? |
36691 | 119) Ought this experiment to be considered as conclusive? |
36691 | 119) What is said of the incompressibility of liquids, and what experiment is related? |
36691 | 119) Why do fluids appear to gravitate more freely than solids? |
36691 | 12) What constitutes the_ figure_, or_ form_ of a body? |
36691 | 12) What examples can you give, to prove that the particles of a body are minute in the extreme? |
36691 | 12) What is meant by divisibility? |
36691 | 12) What is said respecting the form of minerals? |
36691 | 12) What of artificial, and accidental forms? |
36691 | 12) What of the vegetable and animal creation? |
36691 | 12, accounted for? |
36691 | 120) What circumstances occasion oil to float upon water? |
36691 | 120) What difference is there in the gravitation of solid masses, and of fluids? |
36691 | 120) What is there in the nature of a fluid, which causes it to seek this level? |
36691 | 120) When is a fluid said to be in equilibrium? |
36691 | 121) From what does the lateral pressure proceed? |
36691 | 121) What results as regards the pressure of fluids? |
36691 | 122) Has the extent of the surface of a fluid, any effect upon its pressure downwards? |
36691 | 122) What will be the difference between the pressure upon the bottom, and upon one side of a cubical vessel? |
36691 | 123) How could the equilibrium of fluids be exemplified by pouring water in at the spout of a tea- pot? |
36691 | 123) What do we in common mean by calling a body heavy, or light? |
36691 | 123) What is meant by the specific gravity of a body? |
36691 | 124) What has been adopted as a standard for comparison? |
36691 | 124) What must be supposed equal in estimating the specific gravity of a body? |
36691 | 124) Why would not the metals answer to compare other bodies with? |
36691 | 125) What is the first step in ascertaining the specific gravity of a solid? |
36691 | 125) What quantity of water will the solid displace? |
36691 | 125) Why will a solid weigh less in water than in air, and to what will the loss of weight be equal? |
36691 | 126) In comparing a body with water, this is sometimes called 1000, what must be observed? |
36691 | 126) What is stated of gold as an example? |
36691 | 126) What quantity of water is displaced, by a body floating upon its surface? |
36691 | 127) How can you find the specific gravity of a solid which is lighter than water? |
36691 | 127) What is observed of a body whose specific gravity is the same as that of water? |
36691 | 127) What is the reason that in drawing a bucket of water from a well, its weight is not perceived until it rises above the surface? |
36691 | 129) How may drops of rain be formed? |
36691 | 129) Why do not the frequent rains, fill the earth with water? |
36691 | 129) Why will vapour rise? |
36691 | 13) Can matter be in any way annihilated? |
36691 | 13) How do odours exemplify the minuteness of the particles of matter? |
36691 | 13) What becomes of the fuel, which disappears in our fires? |
36691 | 13) What produces the odour of bodies? |
36691 | 130) What becomes of the water after it has fallen to the earth? |
36691 | 130) What is the difference between rain water, and that from springs? |
36691 | 130) Why is rain more pure than spring water? |
36691 | 130) Why is spring water more agreeable to the palate? |
36691 | 131) What causes the water to collect and form springs? |
36691 | 131) Why can not water penetrate through clay? |
36691 | 132) How can you account for its rising upwards, as represented at C? |
36691 | 132) In conveying water by means of pipes, how must the reservoir be situated? |
36691 | 133) Wells and springs, at some periods well supplied, fail at others; how is this accounted for? |
36691 | 133) When water is found in elevated situations, whence is it supplied? |
36691 | 133) Why are wells rarely well supplied with water, in elevated situations? |
36691 | 134) Some springs flow abundantly in dry weather, which occasionally fail in wet weather, how may this be explained? |
36691 | 134) What is meant by intermitting springs? |
36691 | 134) Whence do rivers, in general, derive their water? |
36691 | 134) Why do springs abound more in mountainous, than in level countries? |
36691 | 135) How are lakes formed? |
36691 | 135) What causes water to rise in fountains, and how is this explained by figure 2, plate 14? |
36691 | 135) Why will not the fountain rise to the height of the water in the reservoir? |
36691 | 136) In what particular do elastic, differ from non- elastic, fluids? |
36691 | 136) Into what two kinds are fluids divided? |
36691 | 136) There are different kinds of elastic fluids, in what properties are they alike, and in what do they differ? |
36691 | 136) What is meant by the elasticity of air? |
36691 | 137) What is said respecting the weight of the atmosphere? |
36691 | 137) What would be the effect of relieving us from atmospheric pressure? |
36691 | 137) Why do we not feel the pressure of the air? |
36691 | 138) How is this explained? |
36691 | 138) How may its elasticity be exhibited, by an apple, and by a bladder? |
36691 | 138) How may the weight of the air be shown by the aid of the air pump, and a piece of bladder? |
36691 | 139) How can the weight of a small bulk of air be found? |
36691 | 139) What is the absolute weight of a given column of atmospheric air, and how could its whole pressure upon the earth be ascertained? |
36691 | 14) How can that part which evaporates, be still said to possess a substantial form? |
36691 | 14) What do we mean by_ inertia_? |
36691 | 14) What general power do the particles of matter exert upon other particles? |
36691 | 140) How could you ascertain the specific gravity of air, and what would it be? |
36691 | 140) In ascertaining the weight of air, we take account of its temperature-- Why? |
36691 | 141) Of what use are the divisions in the upper part of the instrument? |
36691 | 141) To what height will the mercury rise, and what occasions this height to vary? |
36691 | 141) What occasions the sensation of oppression, in damp weather? |
36691 | 141) What sustains the mercury in the tube? |
36691 | 141) When is the mercury highest, in wet, or in dry weather? |
36691 | 142) Is any inconvenience experienced by persons ascending to great heights, and from what cause? |
36691 | 142) To what height will the pressure of the atmosphere raise a column of water? |
36691 | 142) What governs the difference between the height of the mercury, and of the water? |
36691 | 142) What occasions the rise and fall of the mercury, in a thermometer? |
36691 | 142) Why will the barometer indicate the height of mountains, or of balloons? |
36691 | 143) How does the common pump, raise water from a well? |
36691 | 143) What is meant by a piston? |
36691 | 144) How do these parts act, in raising the water? |
36691 | 144) How must the piston be situated in the pump? |
36691 | 144) In what does that which is commonly called suction, consist? |
36691 | 144) What other kind of pump is described? |
36691 | 146) How do the winds blow, around the place where the air becomes rarefied? |
36691 | 146) What effect is likely to be produced where the winds meet? |
36691 | 146) What is wind, and how is it generally produced? |
36691 | 147) How are the trade- winds produced, and how far do they extend? |
36691 | 147) How do these winds change their direction as they approach the equator? |
36691 | 147) How is the equilibrium in the air restored? |
36691 | 147) In what part of the globe is the air most rarefied, and what is the consequence? |
36691 | 148) How can contrary currents of air be shown in a room? |
36691 | 148) What causes this? |
36691 | 148) What is meant by a periodical wind? |
36691 | 148) What occasions the land and sea breezes, and where do they prevail? |
36691 | 149) How do they change, and what is the cause? |
36691 | 149) What are monsoons? |
36691 | 149) What is meant by their breaking up, and what effect is in general produced? |
36691 | 149) Why is the wind most variable in high latitudes? |
36691 | 15) Does the attraction of cohesion exist in liquids, and how is its existence proved? |
36691 | 15) From what then do you infer that they possess attraction? |
36691 | 15) How do you account for some bodies being hard and others soft? |
36691 | 15) If the particles of air attract each other, why do they not cohere? |
36691 | 15) What is that species of attraction called, which keeps bodies in a solid state? |
36691 | 150) What effect must the sun and moon produce upon the atmosphere, from their attraction? |
36691 | 150) Why do not the à ¦ rial tides affect the barometer? |
36691 | 150) Why is the wind apt to lessen about sunset? |
36691 | 151) By what experiment might we prove that air is the principal vehicle of sound? |
36691 | 151) Does sound exist in the sonorous body, if not, what is it? |
36691 | 151) How is sound produced? |
36691 | 152) How is it illustrated by a stone thrown into water, and how far does this illustration apply? |
36691 | 152) To what do they owe this property? |
36691 | 152) What is meant by a sonorous body? |
36691 | 152) What other bodies convey sound, and how can it be shown that they do so? |
36691 | 153) At what rate is sound said to travel? |
36691 | 153) How are the vibrations propagated? |
36691 | 153) How can we prove that sound, does not travel as rapidly as light? |
36691 | 153) How will sound enable us to judge of the distance of objects? |
36691 | 153) Is the velocity much influenced by the direction of the wind? |
36691 | 154) How are echoes produced? |
36691 | 155) Does the force, with which a string is struck, affect the rapidity of its vibrations? |
36691 | 155) How are the strings made to produce the high and low notes? |
36691 | 155) How is a musical tone produced? |
36691 | 155) Upon what does the acuteness or gravity of a sound depend? |
36691 | 155) What is meant by harmony, or concord, and how is it produced? |
36691 | 155) What occasions discords? |
36691 | 156) How are fifths produced? |
36691 | 156) How are octaves produced? |
36691 | 156) How major and minor thirds? |
36691 | 156) What is meant by melody, and in what particular does it differ from harmony? |
36691 | 156) When are strings said to be in unison? |
36691 | 157) What are transparent bodies? |
36691 | 157) What is a medium? |
36691 | 157) What is meant by a dark body, and what by an opaque body? |
36691 | 157) What is meant by a luminous body? |
36691 | 157) What is optics? |
36691 | 158) Do we know whether light is a substance, similar to bodies in general? |
36691 | 158) What is a ray, and what a pencil of rays? |
36691 | 158) When a ray of light falls upon an opaque body, what is the result? |
36691 | 158) Why do not the rays of light from different points, stop each other''s progress? |
36691 | 159) In what does shadow consist? |
36691 | 159) Upon what does the intensity of a shadow depend? |
36691 | 159) When is the shadow larger than the intercepting body? |
36691 | 159) Why are they, in general, but partially dark? |
36691 | 16) Do the most dense bodies always cohere the most strongly? |
36691 | 16) How do we know that one body is more dense than another? |
36691 | 16) What is meant by the term_ density_? |
36691 | 16) What is there which acts in opposition to cohesive attraction, tending to separate the particles of bodies? |
36691 | 160) What becomes of the light which falls upon an opaque body? |
36691 | 160) What is meant by reflection? |
36691 | 160) Why will neither of these shadows be very dark? |
36691 | 161) By what light are we enabled to see opaque, and by what, luminous bodies? |
36691 | 161) What enables us to see a ray of light in its passage, through a darkened room? |
36691 | 161) What is meant by the incident, and reflected rays? |
36691 | 161) What is the result, when the incident ray falls perpendicularly, and what, when it falls obliquely? |
36691 | 161) What two angles are always equal in this case? |
36691 | 162) By what reasoning would you prove that an object, such, for example, as a house, is seen by reflected light? |
36691 | 162) How is the fact exemplified by the sun, or moon, shining upon water? |
36691 | 162) Why is this best evinced by moonlight? |
36691 | 162) Why may one side of such object appear more bright than another side? |
36691 | 163) By what light do we see the moon, and why is it comparatively feeble? |
36691 | 163) What circumstance, renders objects seen by moonlight, still less vivid? |
36691 | 164) How do the rays of light operate on the eye in producing vision? |
36691 | 164) How is it explained in plate 16? |
36691 | 164) How may this be exemplified, in a darkened room? |
36691 | 164) What by the retina? |
36691 | 164) What is meant by a_ camera obscura_? |
36691 | 164) What is meant by the pupil of the eye? |
36691 | 165) Is it the object, or its picture on the retina, which presents to the mind an idea of the object seen? |
36691 | 165) What analogy is there between the camera obscura, and the eye? |
36691 | 165) Why are the objects inverted and reversed? |
36691 | 166) By what organs is sensation produced, and how must these organs be affected? |
36691 | 166) How will the idea of contact, apply to objects not touching the eye? |
36691 | 167) Why do not objects appear reversed to the eye, as in the camera obscura? |
36691 | 168) What is meant by the angle of vision, or the visual angle? |
36691 | 169) How is this exemplified, by a house seen through a window? |
36691 | 169) Why do not two objects, known to be equal in size, appear to differ, when at different distances from the eye? |
36691 | 169) Why do objects of the same size appear smaller when distant, than when near? |
36691 | 17) How are drops of rain and of dew said to be formed? |
36691 | 17) If we continue to increase the heat, what effects will it produce on bodies? |
36691 | 17) What body has its dimensions most sensibly affected by change of temperature? |
36691 | 17) What examples can you give? |
36691 | 17) What power restores vapours to the liquid form? |
36691 | 17) What would be the consequence if the repulsive power of heat were not exerted? |
36691 | 170) Excepting the rays from an object enter the eye, under a certain angle, they can not be seen; what must this angle exceed? |
36691 | 170) In drawing a view from nature, what do we copy? |
36691 | 170) Motion may be so slow as to become imperceptible, what is said on this point? |
36691 | 170) Under what circumstances may a body, moving with great rapidity, appear to be at rest? |
36691 | 170) Upon what does the real velocity of a body, depend? |
36691 | 170) What is the difference in sculpture, in this respect? |
36691 | 170) What two circumstances may cause the angle to be so small, as not to produce vision? |
36691 | 170) Why do rows of trees, forming an avenue, appear to approach as they recede from the eye, until they eventually seem to meet? |
36691 | 171) An image of a visible object is formed upon the retina of each eye, why, therefore, are not objects seen double? |
36691 | 171) What is said respecting the evidence afforded by our senses, and how do we correct the errors into which they would lead us? |
36691 | 171) What must be known, to enable us to ascertain the real space contained in a degree? |
36691 | 172) By what experiment can you prove that a separate image of an object is formed in each eye? |
36691 | 172) Under what circumstances are objects seen double? |
36691 | 172) Why is not the image of an object inverted in the common mirror? |
36691 | 173) In what direction will an object always appear to the eye? |
36691 | 173) In what situation may a second person see the image reflected? |
36691 | 173) What is it that reflects the rays in a looking- glass? |
36691 | 173) Why is the image invisible to the person, when not standing directly before the glass? |
36691 | 174) All opaque bodies reflect some light, why do they not all act as mirrors? |
36691 | 174) How are the rays of light affected by them? |
36691 | 174) What are the three kinds of mirrors usually employed for optical purposes? |
36691 | 174) What substances form the most perfect mirrors, and for what reason? |
36691 | 175) At what distance behind such a mirror, would an image, produced by parallel rays, be formed? |
36691 | 175) What is represented by the dotted line in the same figure? |
36691 | 175) What is that point denominated? |
36691 | 176) What is a concave mirror, and what its peculiar property? |
36691 | 176) What is meant by a focus? |
36691 | 176) Why is the point behind the mirror, called the_ imaginary focus_? |
36691 | 177) How if divergent? |
36691 | 177) How, and why, may concave, become burning mirrors? |
36691 | 177) If rays fall on it convergent, how are they reflected? |
36691 | 177) Where is the focus of parallel rays, in a concave mirror? |
36691 | 178) If a luminous body, as a burning taper, be placed in the focus of a concave mirror, how will the rays from it, be reflected? |
36691 | 178) Why may rays of light coming from the sun, be viewed as parallel to each other? |
36691 | 179) What is believed to be the cause of refraction? |
36691 | 179) What is meant by the refraction of light? |
36691 | 18) In what does_ gravitation_ differ from cohesive attraction? |
36691 | 18) What causes bodies near the earth''s surface, to have a tendency to fall towards it? |
36691 | 18) What effect does attraction produce when these are immersed in water? |
36691 | 18) What is meant by a capillary tube? |
36691 | 18) What is the reason that the water rises to a certain height only? |
36691 | 180) How is a ray refracted in passing obliquely from air into water? |
36691 | 180) What is the rule respecting refraction, by different mediums? |
36691 | 181) What effect has refraction upon the apparent depth of a stream of water? |
36691 | 181) What is meant by the perpendicular? |
36691 | 181) What will be the effect on the apparent situation of the flower? |
36691 | 182) How is the length of the day affected by refraction? |
36691 | 182) What effect has this upon his apparent place? |
36691 | 182) What length of time is required for light to travel from the sun, to the earth? |
36691 | 182) Why have we the rays of the sun always refracted? |
36691 | 183) What is the reason that objects are distorted, when seen through common window glass? |
36691 | 184) What is meant by a lens? |
36691 | 184) What is meant by the axis of a lens? |
36691 | 184) What is meant by the focus of a lens? |
36691 | 184) What is the focal distance of parallel rays, from a double convex lens? |
36691 | 185) How will a ray be refracted, which enters on one side of the prism, in the direction A B? |
36691 | 185) What is the effect of one plane side in a lens? |
36691 | 186) By what property, in light, does refraction enable us to separate these different rays? |
36691 | 186) Of what are the rays of white light said to be composed? |
36691 | 186) What colours are produced? |
36691 | 187) Is it certain that there are seven primitive colours in the spectrum? |
36691 | 187) What experiment may be performed with a piece of card, so as to exemplify the compound nature of light? |
36691 | 188) How are the solar rays affected by a convex lens? |
36691 | 188) How is the rainbow produced, and what is necessary to its production? |
36691 | 188) Why are bodies of a dark colour, more readily inflamed, than those which are white? |
36691 | 188) Why is such a lens, called a burning glass? |
36691 | 189) By what reasoning is it proved, that bodies do not retain their colours in the dark? |
36691 | 189) What determines the colour of any particular body? |
36691 | 189) What exemplifications are given? |
36691 | 189) What is believed to be the reason, why some bodies absorb more rays than others? |
36691 | 19) In what instances does the power of cohesion counteract that of gravitation? |
36691 | 19) What remarkable difference is there between the attraction of gravitation, and that of cohesion? |
36691 | 19) Why will water rise to a less height, if the size of the tube is increased? |
36691 | 190) What proof of the truth of this theory of colours, may be afforded by the prism? |
36691 | 191) Bodies, in general, when placed in a ray differing in colour from their own, appear of a mixed hue, what causes this? |
36691 | 191) Why will bodies of a pale, or light hue, most perfectly, assume the different colours of the spectrum? |
36691 | 191) Why will green leaves, when exposed to the red ray, appear of a dingy brown? |
36691 | 192) From what cause do blue articles appear green, by candle- light? |
36691 | 192) Upon what property in a body, does the darkness of its colour depend? |
36691 | 192) Why do some bodies appear white, others black, and others of different colours? |
36691 | 193) From what cause do some bodies change their colour, as leaves formerly green, become brown, and ink, yellow? |
36691 | 193) From what is the blue colour of the sky, thought to arise? |
36691 | 193) What is believed to be the cause, of the red appearance of the sun, through a fog, or misty atmosphere? |
36691 | 193) What would be the colour of the sky, did not the atmosphere reflect light? |
36691 | 194) Why is a black dress, warmer in the sunshine, than a white one of the same texture? |
36691 | 195) The pupils dilate and contract, what purpose does this answer? |
36691 | 195) What is its external coat called? |
36691 | 195) What is the coloured part which surrounds the pupil? |
36691 | 195) What is the form of the body of the eye? |
36691 | 195) What is the second coat named? |
36691 | 195) What is the transparent part of this coat denominated? |
36691 | 195) What opening is there in this? |
36691 | 196) How could you observe the dilatation and contraction of the pupils? |
36691 | 196) In what animals is the change in the iris greatest? |
36691 | 196) What are the three humours denominated, and how are they situated? |
36691 | 196) What purpose is the choroid said to answer? |
36691 | 197) What are the respective uses of the humours, and of the retina? |
36691 | 197) What is the part represented at_ i i_, and of what does it consist? |
36691 | 197) Why is it necessary the rays should be refracted? |
36691 | 198) What causes a person to be short- sighted? |
36691 | 198) Why does placing an object near the eye, enable such, to see distinctly? |
36691 | 199) A concave lens remedies this defect; how? |
36691 | 199) What is the remedy, when a person is long- sighted? |
36691 | 199) Why does holding an object far from the eye, help such persons? |
36691 | 1? |
36691 | 2 and 3, plate 10? |
36691 | 2 intended to explain? |
36691 | 2, 3, plate 13? |
36691 | 2, plate 12? |
36691 | 2, plate 17? |
36691 | 2, plate 20? |
36691 | 2, plate 9? |
36691 | 2, that their momentums may be equal? |
36691 | 2, what are they? |
36691 | 2. plate 11? |
36691 | 2. plate 5? |
36691 | 2. plate 7? |
36691 | 2.)? |
36691 | 20) Can two bodies be made sufficiently flat to cohere with considerable force? |
36691 | 20) What is the reason that the adhesion is greater when oil is interposed? |
36691 | 20) Why do not two bodies cohere, when laid upon each other? |
36691 | 200) How is the eye said to adapt itself to distant, and to near objects? |
36691 | 200) Why are objects rendered indistinct, when placed very near to the eye? |
36691 | 201) How may objects be magnified without the aid of a lens? |
36691 | 201) Why can an object, very near to the eye, be distinctly seen, when viewed through a small hole? |
36691 | 202) Why may minute objects be greatly magnified by this instrument? |
36691 | 203) In what does the magic lanthorn differ from the solar microscope? |
36691 | 203) What is added when opaque objects are to be viewed? |
36691 | 204) In what does the reflecting, differ from the refracting telescope? |
36691 | 204) What advantages, do reflecting, possess over refracting telescopes? |
36691 | 204) What part of the telescope performs the part of a microscope? |
36691 | 204) When terrestrial objects are to be viewed, why are two additional lenses employed? |
36691 | 21) What other modifications of attraction are there, besides those of cohesion and of gravitation? |
36691 | 22) What are those properties of bodies called, which are not common to all? |
36691 | 23) What is the cause of weight in bodies? |
36691 | 23) What is the reason that all bodies near to the surface of the earth, are drawn towards it? |
36691 | 23) Why are they so called? |
36691 | 24) If attraction be in proportion to the mass, why does not a hill, draw towards itself, a house placed near it? |
36691 | 24) If attraction is the cause of weight, could you suppose it possible for a body to possess the former and not the latter property? |
36691 | 24) If the attraction be mutual, why does not the earth approach the stone, as much as the stone approaches the earth? |
36691 | 24) When a stone falls to the ground, in which of the two bodies does the power of attraction exist? |
36691 | 25) How can the attraction of a mountain be rendered sensible? |
36691 | 25) Why can not two lines which are perpendicular to the surface of the earth be parallel to each other? |
36691 | 27) If bodies were not resisted by the air, those which are light, would fall as quickly as those which are heavy, how can you account for this? |
36691 | 27) What then is the reason that a book, and a sheet of paper, let fall from the same height, will not reach the ground in the same time? |
36691 | 28) Inform me how a very dense body may be made to float in the air? |
36691 | 28) The air is a real body, why does it not fall to the ground? |
36691 | 28) What could you do to a sheet of paper, to make it fall quickly, and why? |
36691 | 28) What then will be the effect of increasing the surface of a body? |
36691 | 29) Smoke and vapour ascend in the atmosphere, how can you reconcile this with gravitation? |
36691 | 29) What is it which causes the particles of air to recede from each other, and seems to destroy their mutual attraction? |
36691 | 3 and 4, plate 21? |
36691 | 3, plate 18? |
36691 | 3, plate 19, elucidate the law of refraction? |
36691 | 3, plate 20? |
36691 | 3. plate 17? |
36691 | 3. plate 4? |
36691 | 3. plate 6? |
36691 | 3.)? |
36691 | 30) Air balloons are formed of heavy materials, how will you account for their rising in the air? |
36691 | 30) Does smoke rise to a great height in the air, and if not, what prevents its so doing? |
36691 | 30) How would you illustrate this by the floating of a piece of paper on water? |
36691 | 30) Of what does smoke consist? |
36691 | 30) What influence does the air exert, on bodies less dense than itself, on those of equal, and on those of greater density? |
36691 | 30) What limits the height to which vapours rise? |
36691 | 31) How could this be exemplified by means of the air pump? |
36691 | 31) If the air could be entirely removed, what influence would this have upon the falling of heavy and light bodies? |
36691 | 32) In what does motion consist? |
36691 | 32) On what is the science of mechanics founded? |
36691 | 33) How is relative velocity distinguished? |
36691 | 33) How will a body move, if acted on by a single force? |
36691 | 33) Velocity is divided into absolute and relative; what is meant by absolute velocity? |
36691 | 33) What do we call that which produces motion? |
36691 | 33) What do we intend by the term velocity, and to what is it proportional? |
36691 | 33) What is the consequence of inertia, on a body at rest? |
36691 | 33) What is the reason of this? |
36691 | 33) What may we say of gravity, of cohesion, and of heat, as forces? |
36691 | 34) A ball struck by a bat gradually loses its motion; what causes produce this effect? |
36691 | 34) How do we measure the velocity of a body? |
36691 | 34) How is uniform motion produced? |
36691 | 34) The space? |
36691 | 34) The time? |
36691 | 34) What is uniform motion? |
36691 | 35) If gravity did not draw a projected body towards the earth, and the resistance of the air were removed, what would be the consequence? |
36691 | 35) In this case would not a great degree of force be required to produce a continued motion? |
36691 | 35) What is retarded motion? |
36691 | 36) What is accelerated motion? |
36691 | 37) By what reasoning is it proved that there is no difference? |
36691 | 37) What is the difference in the time of the ascent and descent, of a stone, or other body thrown upwards? |
36691 | 37) What number of feet will a heavy body descend in the first second of its fall, and at what rate will its velocity increase? |
36691 | 38) How do we ascertain the momentum? |
36691 | 38) How may a light body have a greater momentum than one which is heavier? |
36691 | 38) What is meant by the momentum of a body? |
36691 | 38) Why must we_ multiply_ the weight and velocity together in order to find the momentum? |
36691 | 39) What is meant by reaction, and what is the rule respecting it? |
36691 | 39) When we represent weight and velocity by numbers, what must we carefully observe? |
36691 | 39) Why is it particularly important, to understand the nature of momentum? |
36691 | 3? |
36691 | 3? |
36691 | 3? |
36691 | 3? |
36691 | 4, plate 13? |
36691 | 4, plate 14.? |
36691 | 4, plate 15? |
36691 | 4, plate 17? |
36691 | 4, plate 20? |
36691 | 4, plate 2? |
36691 | 4. plate 3? |
36691 | 4. plate 4? |
36691 | 4. plate 6? |
36691 | 40) How must their wings operate in enabling them to remain stationary, to rise, and to descend? |
36691 | 40) How will reaction assist us in explaining the flight of a bird? |
36691 | 40) What must be the nature of bodies, in which the whole motion is communicated from one to the other? |
36691 | 41) Do elastic bodies exhibit any indentation after a blow? |
36691 | 41) How does reaction operate in enabling us to swim, or to row a boat? |
36691 | 41) What constitutes elasticity? |
36691 | 41) What hard bodies are mentioned as elastic? |
36691 | 41) What name is given to air, and for what reason? |
36691 | 41) Why can not a man fly by the aid of wings? |
36691 | 42) All bodies are believed to be porous, what is said on this subject respecting gold? |
36691 | 42) Are those bodies always the most elastic, which are the least dense? |
36691 | 42) What do we conclude from elasticity respecting the contact of the particles of a body? |
36691 | 43) If you throw an elastic body against a wall, it will rebound; what is this occasioned by, and what is this return motion called? |
36691 | 43) What conjecture was made by sir Isaac Newton, respecting the porosity of bodies in general? |
36691 | 43) What do we mean by a perpendicular line? |
36691 | 43) What is an angle? |
36691 | 44) Figure 2 represents an angle of more than 90 degrees, what is that called? |
36691 | 44) Have the length of the lines which meet in a point, any thing to do with the measurement of an angle? |
36691 | 44) How must one line be situated on another to form two right angles? |
36691 | 44) Into what number of parts do we suppose a whole circle divided, and what are these parts called? |
36691 | 44) Upon what does the dimension of an angle depend? |
36691 | 44) What number of degrees, and what portion of a circle is there in a right angle? |
36691 | 44) What use can we make of compasses in measuring an angle? |
36691 | 44) When are two angles said to be equal? |
36691 | 45) How if it strikes obliquely? |
36691 | 45) If you make an elastic ball strike a body at right angles, how will it return? |
36691 | 46) If a body be struck by two equal forces in opposite directions, what will be the result? |
36691 | 47) How must a body be acted on, to produce motion in a curve, and what example is given? |
36691 | 47) How would the ball move, and how would you represent the direction of its motion? |
36691 | 47) How would the body move if so impelled? |
36691 | 48) What is intended by the axis of motion, and what are examples? |
36691 | 48) What is said of the axis of motion, whilst the body is revolving? |
36691 | 48) What is the middle point of a body called? |
36691 | 48) When a body revolves on an axis, do all its parts move with equal velocity? |
36691 | 48) When is a body said to revolve in a plane, and what is meant by the centre of motion? |
36691 | 49) If the centripetal force were destroyed, how would a body be carried by the centrifugal? |
36691 | 4? |
36691 | 4? |
36691 | 4? |
36691 | 5, and how does it magnify objects? |
36691 | 5, plate 13? |
36691 | 5, plate 15? |
36691 | 5, plate 19?) |
36691 | 5. plate 2. intended to represent? |
36691 | 5. plate 20? |
36691 | 5. plate 4? |
36691 | 5. plate 5? |
36691 | 50) What forces impede a body thrown horizontally? |
36691 | 51) The curve in which it falls, is not a part of a true circle: what is it denominated? |
36691 | 51) What is the_ centre of gravity_ defined to be? |
36691 | 51) What results from supporting, or not supporting the centre of gravity? |
36691 | 51) What would be the effect of taking off the upper portion of the load? |
36691 | 52) What is said of the centre of gravity of the human body, and how does a rope dancer preserve his equilibrium? |
36691 | 52) When will a carriage stand most firmly? |
36691 | 52) Why can not a sphere remain at rest on an inclined plane? |
36691 | 53) What influence will the density of the parts of a body exert upon its stability? |
36691 | 53) What is said respecting two bodies united by an inflexible rod? |
36691 | 53) What other circumstance materially affects the firmness of position? |
36691 | 53) When do we find the centres of gravity, and of magnitude in different points? |
36691 | 53) Why is it more easy to carry a weight in each hand, than in one only? |
36691 | 54) How many mechanical powers are there, and what are they named? |
36691 | 54) Upon what will the velocities depend? |
36691 | 54) What four particulars must be observed? |
36691 | 54) What is a mechanical power defined to be? |
36691 | 55) Were the fulcrum removed from the middle of the beam what would result? |
36691 | 55) What do we mean by the arms of a lever? |
36691 | 55) What is a lever? |
36691 | 55) When and why do the scales balance each other, and where is their centre of gravity? |
36691 | 55) Why would they not balance with unequal weights? |
36691 | 56) How may a pair of scales be false, and yet appear to be true? |
36691 | 56) If the fulcrum be removed from the centre of gravity, how may the equilibrium be restored? |
36691 | 56) What proportion must the weights bear to the lengths of the arms? |
36691 | 57) On what principle do we weigh with a pair of steelyards, and what will be the difference in the motion of the extremities of such a lever? |
36691 | 58) How many kinds are there; and in the first how is the fulcrum situated? |
36691 | 58) What line is described by the ends of a lever? |
36691 | 58) When may the fulcrum be so situated that this lever is not a mechanical power, and why? |
36691 | 59) How may two horses of unequal strength, be advantageously coupled in a carriage? |
36691 | 59) In what instruments are two such levers combined? |
36691 | 5? |
36691 | 5? |
36691 | 6, plate 13? |
36691 | 6, plate 14? |
36691 | 6, plate 15? |
36691 | 6, plate 19? |
36691 | 6, plate 19? |
36691 | 60) In what instance do we use this? |
36691 | 60) What is said respecting a door? |
36691 | 61) What are the conditions of equilibrium in every lever? |
36691 | 61) What remarks are made on its employment in the limbs of animals? |
36691 | 62) Of what use is the fixed pulley? |
36691 | 62) What is meant by a fixed pulley and why is not power gained by its employment? |
36691 | 64) How do we estimate the power gained by a system of pulleys? |
36691 | 64) If to gain power we must lose time, what advantage do we derive from the mechanical powers? |
36691 | 64) What is a fundamental law as respects power and time? |
36691 | 64) What name is given to two or more pulleys connected by one string? |
36691 | 65) How could we increase the power in this instrument? |
36691 | 65) How does the wheel operate in increasing power? |
36691 | 65) How is this compared with the lever? |
36691 | 66) How does its power increase? |
36691 | 66) In what proportion does it gain power? |
36691 | 66) To what is the wedge compared? |
36691 | 66) What other forces besides the power of men, do we employ to move machines? |
36691 | 66) What will serve as an example of an inclined plane? |
36691 | 67) How can you compare the screw with an inclined plane? |
36691 | 67) The screw has two essential parts; what are they? |
36691 | 67) What common instruments act upon the principle of the inclined plane, or the wedge? |
36691 | 67) What other instrument is used to turn the screw? |
36691 | 67) Why does a knife cut best when drawn across? |
36691 | 67) Why is it rather a compound than a simple power? |
36691 | 68) By what two means may the power of the screw be increased? |
36691 | 68) How do we estimate the power gained by the screw? |
36691 | 68) Is the lever always attached to the nut, as in the figure? |
36691 | 68) What is said respecting the composition of all machines, and for what must allowance always be made in estimating their power? |
36691 | 69) For what purpose are wheels often used? |
36691 | 69) Friction is of two kinds, what are they? |
36691 | 69) How may friction be diminished? |
36691 | 69) What is meant by friction, and what causes it? |
36691 | 69) When is the friction of a carriage wheel changed from the rolling to the rubbing friction? |
36691 | 6? |
36691 | 6? |
36691 | 7, plate 13? |
36691 | 7, plate 14)? |
36691 | 7, plate 18? |
36691 | 7, plate 19? |
36691 | 7, plate 3, intended to illustrate? |
36691 | 7. plate 4, and in what proportion does this lever gain power? |
36691 | 70) Under what circumstances must a body be placed, in order to move without impediment? |
36691 | 70) What is a medium, and in what proportion does it diminish motion? |
36691 | 71) Had the earth received a projectile force only, at the time of its creation, how would it have moved? |
36691 | 71) What revolution does the earth perform in a year? |
36691 | 72) Describe the operation of the forces of projection and of gravity as illustrated by the parallelograms in the figure? |
36691 | 72) How does the force of gravity change the diagonal into a curved line? |
36691 | 72) What have you been taught respecting a body acted upon by two forces at right angles with each other? |
36691 | 72) What is the law respecting the time required for motion in the diagonal? |
36691 | 73) Does the earth revolve in a circular orbit? |
36691 | 73) How must you apply it to this purpose? |
36691 | 73) How will what you have learned respecting motion in a curve, apply to the earth''s motion? |
36691 | 73) If these two forces did not exactly balance each other, what would result? |
36691 | 73) In what form are you directed to cut a piece of card to aid in illustrating the two forces acting upon the earth? |
36691 | 73) What portion of a year is represented by the three diagonals in the figure? |
36691 | 73) What results from its motion in an ellipsis? |
36691 | 74) What effect will the accelerated motion then produce? |
36691 | 74) When it has arrived at E, what angle will be formed by the lines representing the two forces? |
36691 | 75) What is meant by_ perihelion_, and by_ aphelion_? |
36691 | 75) What is the consequence as regards the regularity of the earth''s motion? |
36691 | 75) What is the difference of the distance of the earth from the sun, in these two points? |
36691 | 75) What is the form of the earth''s orbit, and what circumstances produce this form? |
36691 | 76) Are the summer and winter, half years, of the same length; what is their difference, and what is the cause? |
36691 | 76) At what season of the year is it nearest to, and at what furthest from the sun? |
36691 | 76) Has it any influence on the sun''s apparent size? |
36691 | 76) What are the planets? |
36691 | 76) What is the mean distance of the earth from the sun? |
36691 | 76) Why is but little effect produced, as regards temperature, by the change of distance? |
36691 | 77) What circumstances render it probable that they are habitable globes? |
36691 | 77) What discoveries have been made in the moon? |
36691 | 77) What is believed respecting the fixed stars? |
36691 | 77) What prevents our seeing the planets, if there are any, which revolve round the fixed stars? |
36691 | 77) What prevents our seeing the stars and planets in the day- time? |
36691 | 78) How does this occasion night and day? |
36691 | 78) In what direction does the earth turn upon its axis, and what apparent motion of the sun, moon, and stars is thereby produced? |
36691 | 78) What is the imaginary line called, round which they revolve? |
36691 | 78) What other motions have the earth and planets, besides that in their orbits? |
36691 | 79) What must be the appearance of the earth to an inhabitant of one of the planets? |
36691 | 79) What the appearance of the earth to an inhabitant of the moon? |
36691 | 79) What the appearance of the sun to the inhabitants of planets in other systems? |
36691 | 7? |
36691 | 8, plate 13, and also how, and for what it is used? |
36691 | 80) By what reasoning do you prove that the sun contains a greater quantity of matter than any other body in the system? |
36691 | 80) Into what two classes are the planets divided, and how are they distinguished? |
36691 | 81) Does this apply to any power excepting gravitation? |
36691 | 81) How is it that a secondary planet revolves round its primary, and is not drawn off by the sun? |
36691 | 81) How is the rule upon this subject expressed? |
36691 | 81) Were a planet removed to double its former distance from the sun, what would be the effect upon its attractive force? |
36691 | 81) What is meant by the square of a number, and what examples can you give? |
36691 | 81) What then would be the effect of removing it to three, or four times its former distance? |
36691 | 81) What two circumstances govern the force with which bodies attract each other? |
36691 | 81) Why would it be reduced to one- fourth? |
36691 | 82) By what law in mechanics is this explained? |
36691 | 82) What effect have the planets upon the sun, and what is said of the common centre of gravity of the system? |
36691 | 82) What is said respecting the revolution of the moon, and of the earth, round a common centre of gravity? |
36691 | 82) What motions then has the earth, and are these remarks confined to it alone? |
36691 | 83) How may you observe the motion of a planet, by means of a fixed star? |
36691 | 83) What are we told respecting Mercury? |
36691 | 83) What other motion has the sun, and how is it proved? |
36691 | 83) Why are the orbits represented as circular? |
36691 | 84) What four small planets follow next? |
36691 | 84) What is said of the Earth? |
36691 | 84) What of Mars? |
36691 | 84) What respecting Venus? |
36691 | 84) When does Venus become a morning, and when an evening star? |
36691 | 85) In what proportion will the light and heat at Saturn be diminished, and why? |
36691 | 85) What is said of Jupiter? |
36691 | 85) What of Herschel? |
36691 | 85) What of Saturn? |
36691 | 85) Why do we conclude that the moons of Saturn afford less light than ours? |
36691 | 86) How are the twelve constellations, or signs, called the zodiac, situated? |
36691 | 86) What causes the apparent change of the sun''s place? |
36691 | 86) What do the comets resemble, and what is remarkable in their orbits? |
36691 | 86) What is a constellation? |
36691 | 86) What is meant by the sun being in a sign? |
36691 | 86) What is said of the number of comets? |
36691 | 87) The stars appear of different magnitudes, by what may this be caused? |
36691 | 87) We are not sensible of the motion of the earth; what fact is mentioned to illustrate this point? |
36691 | 87) What does this teach us? |
36691 | 88) If we do not feel the motion of the earth, how may we be convinced of its reality? |
36691 | 88) Would the slowness, or the rapidity of the motion, if steady, produce any sensible difference? |
36691 | 89) Were we to deny the motion of the earth upon its axis, what must we admit respecting the heavenly bodies? |
36691 | 89) What distance does the earth travel in a minute, in its revolution round the sun? |
36691 | 89) What distance is an inhabitant on the equator carried in a minute by the diurnal motion of the earth? |
36691 | 89) What do we mean by the Copernican system, and what is said respecting Copernicus and Newton? |
36691 | 89) What was formerly supposed respecting the motion of all the heavenly bodies? |
36691 | 89) Why is not the velocity every where equally great? |
36691 | 9, plate 13? |
36691 | 90) What circumstance is said to have given rise to the speculations of Newton, on the subject of gravitation? |
36691 | 92) Against what mistake must you guard respecting this line? |
36691 | 92) There are two hemispheres; how are they named and distinguished? |
36691 | 92) What are the circles near the poles called? |
36691 | 92) What circle is in part represented by the line L K? |
36691 | 92) What do the lines I K, and L M, represent? |
36691 | 92) What is meant by a plane, and how could one be represented? |
36691 | 92) What is meant by the equator, and how is it situated? |
36691 | 93) Extending this plane to the fixed stars, what circle would it form, and among what particular stars would it be found? |
36691 | 93) How do meridian lines extend, and what is meant by the meridian of a place? |
36691 | 93) The ecliptic does not properly belong to the earth, for what purpose then is it described on the terrestrial globe? |
36691 | 93) What does the obliquity of the ecliptic to the equator serve to show? |
36691 | 93) What is meant by the term zone; and are the frigid zones properly so called? |
36691 | 93) What is said of the meridian to which the sun is opposite, and where is it then midnight? |
36691 | 93) What two zones are there between the torrid, and the two frigid zones? |
36691 | 93) Where are the frigid zones situated? |
36691 | 93) Within what limits do you find the torrid zone? |
36691 | 94) How are degrees of latitude measured, and to what number do they extend? |
36691 | 94) How are greater and lesser circles distinguished? |
36691 | 94) How many degrees are there between the equator and the poles? |
36691 | 94) Into what parts, besides degrees, is the ecliptic divided? |
36691 | 94) On what circles are degrees of longitude measured, and to what number do they extend? |
36691 | 94) What hour is it then, at places exactly half way between these meridians? |
36691 | 94) What is a parallel of latitude? |
36691 | 94) What is the diameter, and what the circumference of a circle, and what proportion do they bear to each other? |
36691 | 94) What part of a circle is a degree, and how are these further divided? |
36691 | 94) What part of a circle is a meridian? |
36691 | 95) Degrees of longitude vary in length; what is the cause of this? |
36691 | 95) What is the cause of this form being given to the earth? |
36691 | 95) What is the length of a degree of latitude, and why do not these vary? |
36691 | 96) A body situated at the poles, is attracted more forcibly than if placed at the equator, what is the reason? |
36691 | 96) What would have been a consequence of the centrifugal force, had the earth been a perfect sphere? |
36691 | 97) What effect would be produced upon the gravity of a body, were it placed beneath the surface of the earth, and what supposing it at its centre? |
36691 | 97) What two circumstances combine, to lessen the weight of a body on the equator? |
36691 | 97) Why could not this be proved by weighing a body at the poles, and at the equator? |
36691 | 98) To what use has this property of the pendulum been applied? |
36691 | 98) Two pendulums of the same length, will not, in different latitudes, perform their vibrations in equal times, what is the cause of this? |
36691 | 98) What causes it to vibrate? |
36691 | 98) What is a pendulum? |
36691 | 98) Why are not its vibrations perpetual? |
36691 | 99) How much is the axis of the earth inclined, and with what line does it form this angle? |
36691 | 99) In the revolution of the earth round the sun, what is the position of its axis? |
36691 | 99) What change must be made in pendulums situated at the equator and at the poles, to render their vibrations equal? |
36691 | 99) What do the vibrations of a pendulum resemble, and why will it vibrate more rapidly if shortened? |
36691 | 9? |
36691 | A lens, then, answers the purpose equally well, either for magnifying or diminishing objects? |
36691 | Am I not right, Mrs. B.? |
36691 | And pray, Mrs. B., when my brothers play at_ see- saw_, is not the plank on which they ride, a kind of lever? |
36691 | And pray, at what rate do we move? |
36691 | And why is it not the case with the shadows of terrestrial objects? |
36691 | B._ And now that I pour more water into the bason, why does the paper rise? |
36691 | B._ Bodies thus projected, you observe, describe a curve- line in their descent; can you account for that? |
36691 | B._ Caroline, what would be the effect, were the body supported in any other single point? |
36691 | B._ Did it ever occur to you as extraordinary, that you never beheld your own face? |
36691 | B._ Do you not know, that, in the course of time, all the water which sinks into the ground, rises out of it again? |
36691 | B._ Do you understand what is meant by the level, or equilibrium of fluids? |
36691 | B._ Have we not a similar proof of the earth''s motion, in the apparent motion of the sun and stars? |
36691 | B._ Is nature less pleasing for being coloured, as well as illumined, by the rays of light? |
36691 | B._ Now tell me, do you think that your brother could raise you as easily without the aid of a lever? |
36691 | B._ Suppose there were but one body existing in universal space, what would its weight be? |
36691 | B._ Very well; and what number of degrees are there from the equator to one of the poles? |
36691 | B._ Very well; and where is the centre of gravity of this pair of scales? |
36691 | B._ Well, my dear, pray what is this weighty objection? |
36691 | B._ What is that which makes the gilt buttons on your brothers coat shine? |
36691 | B._ What will you say, my dear, when I tell you, that these two forces are not, in fact, so proportioned as to produce circular motion in the earth? |
36691 | B._ Why should you think so? |
36691 | B._ Would it not have been better to have answered with a moment''s reflection, Caroline? |
36691 | B._ You mean, I suppose, in other words to inquire whether two lines which are perpendicular to the earth, are parallel to each other? |
36691 | Before the time of Newton, was not the earth supposed to be in the centre of the system, and the sun, moon, and stars to revolve round it? |
36691 | But I do not see how this accounts for the motion of the secondary, round the primary planets, in preference to moving round the sun? |
36691 | But I do not understand what makes the planets shine? |
36691 | But I do not understand why the longest arm of the lever should not be in equilibrium with the other? |
36691 | But does that chair, at the further end of the room, form an image on my retina, much smaller than this which is close to me? |
36691 | But in the earth''s revolution round the sun, every part must move with equal velocity? |
36691 | But is not height also a dimension of extension? |
36691 | But is the air a body of the same nature as other bodies? |
36691 | But of what use then is a fixed pulley in mechanics? |
36691 | But pray what is it that produces the elasticity of bodies? |
36691 | But this microscope can be used only for transparent objects; as the light must pass through them, to form the image on the wall? |
36691 | But what is a sonorous body, Mrs. B.? |
36691 | But what sort of weather must those people have, who live on the spot, where these winds meet and interfere? |
36691 | But why is this defect remedied by bringing the object nearer to the eye, as we find to be the case with short- sighted people? |
36691 | But would the same effect be produced, if the spout and the pot, were of equal dimensions? |
36691 | But, Mrs. B., if attraction is a property essential to matter, weight must be so likewise; for how can one exist without the other? |
36691 | But, Mrs. B., if the air is a real body, is it not also subjected to the laws of gravity? |
36691 | But, Mrs. B., what is the reason that the green leaves, are of a brighter blue than the rose? |
36691 | But, Mrs. B., why does not the sun produce tides, as well as the moon; for its attraction is greater than that of the moon? |
36691 | But, pray, do they see the earth under all the changes, which the moon exhibits to us? |
36691 | Can you form any idea what this loss will be? |
36691 | Can you tell me now how much more light we enjoy than Saturn? |
36691 | Can you tell me now, how the earth will move? |
36691 | Can you tell me, Caroline, how many miles you will have travelled, if your velocity is three miles an hour, and you travel six hours? |
36691 | Can you tell me, Caroline, why objects at a distance, appear smaller than they really are? |
36691 | Caroline, place yourself in the direction of the reflected rays, and tell me whether you do not see Emily''s image in the glass? |
36691 | Did you ever notice the swingle- tree of a carriage to which the horses are attached when drawing? |
36691 | Did you ever observe that a lever describes the arc of a circle in its motion? |
36691 | Did you see, Emily, the feather appeared as heavy as the guinea? |
36691 | Do not rivers also, derive their source from springs? |
36691 | Do not the extremities of the vanes of a windmill move over a much greater space, than the parts nearest the axis of motion? |
36691 | Do we not every day see heavy bodies fall quickly, and light bodies slowly? |
36691 | Do you know how that is contrived? |
36691 | Do you perceive the water rising in this small glass tube, above its level in the goblet of water, into which I have put one end of it? |
36691 | Do you recollect those beautiful lines of Milton? |
36691 | Do you see the flower painted at the bottom of the inside of this tea- cup? |
36691 | Do you understand this, Caroline? |
36691 | Do you understand this? |
36691 | Do you understand this? |
36691 | Do you understand what an angle is? |
36691 | Does not this prove that I see the objects themselves? |
36691 | Does not this table weigh heavier than this book; and, if one thing weighs heavier than another, must there not be such a thing as weight? |
36691 | Does that house appear to you much smaller, than when you are close to it? |
36691 | Emily, do you recollect the names of the general properties of bodies? |
36691 | Have you ever seen your brother move a snow- ball by means of a strong stick, when it became too heavy for him to move without assistance? |
36691 | Have you never observed a black dress, to be warmer than a white one? |
36691 | How may this be effected? |
36691 | I should have thought it would have been just the contrary, for land is certainly a more dense body than water? |
36691 | I thought that it was impossible to produce perpetual motion? |
36691 | I told her that it required no support; she then inquired why it did not fall as every thing else did? |
36691 | I will show you another instance, of the weight of the atmosphere, which I think will please you: you know what a barometer is? |
36691 | I wonder how the idea of gravitation could first have occurred to sir Isaac Newton? |
36691 | If you weigh a piece of gold, in a glass of water, will not the gold displace just as much water, as is equal to its own bulk? |
36691 | Is not a fluid level when its surface is smooth and flat, as is the case with all fluids, when in a state of rest? |
36691 | Is not that a strong argument against your theory? |
36691 | Is the firm adhesion of the two plates merely owing to the attraction of cohesion? |
36691 | Let us now fix it on the air pump, and exhaust the air from underneath it-- you will not be alarmed if you hear a noise? |
36691 | Let us suppose a body to be struck by two equal forces in opposite directions, how will it move? |
36691 | Look at that large sheet of water; can you tell why the sun appears to shine on one part of it only? |
36691 | Look at this bason of water; why does the piece of paper which I throw into it float on the surface? |
36691 | Now Emily, it is your turn; what is_ accelerated motion_? |
36691 | Now Emily, you may tell me exactly how many degrees are contained in a meridian? |
36691 | Now I will lay it on the surface of the water; but there it sinks a little-- what is the reason of that, Mrs. B.? |
36691 | Now can you tell me what is_ retarded motion_? |
36691 | Now can you tell me whether the air is heavier, in wet, or in dry weather? |
36691 | Now that I have removed the mirror out of the influence of the sun''s rays, if I place a burning taper in the focus, how will its light be reflected? |
36691 | Now, Emily, let me hear if you can explain how the gravity of bodies is modified by the effect of the air? |
36691 | Now, Mrs. B., will you let me fill the tube, by pouring water into the goblet? |
36691 | Now, can you tell me in what direction the three rays, A B, C D, E F, will be reflected? |
36691 | Now, if the air were destitute of weight, how could it support other bodies, or retard their fall? |
36691 | Suppose the two forces are unequal, but do not act on the ball in the direction of a right angle, but in that of an acute angle, what will result? |
36691 | Tell me, Caroline, what do you understand by the word motion? |
36691 | That part of the sheet of water, over which the trees cast a shadow, by what light do you see it? |
36691 | The power of the screw, complicated as it appears, is referable to one of the most simple of the mechanical powers; which of them do you think it is? |
36691 | The spot of light is extremely brilliant, but the paper does not burn? |
36691 | Those who live to the north of it, experience a north wind; those to the south, a south wind:--do you comprehend this? |
36691 | To the inhabitants of the other planets, then, we must appear as a little star? |
36691 | Well, Caroline, have you ascertained what kind of pump you have in your garden? |
36691 | Well, you will perhaps be surprised to hear that the gold will weigh less in water, than it did out of it? |
36691 | What is it that occasions the fall of this book, when I no longer support it? |
36691 | What is the reason that the great quantity of rain which falls upon the earth and sinks into it, does not, in the course of time, injure its solidity? |
36691 | What reason is there to regret, that she does not wear it when she is invisible? |
36691 | What substance do you think would be best calculated to answer this end? |
36691 | What then ensues? |
36691 | What, Mrs. B., are we all as black as negroes in the dark? |
36691 | Why then should these enormous globes daily traverse such a prodigious space, merely to prevent the necessity of our earth''s revolving on its axis? |
36691 | Will the wagon now be upset? |
36691 | With what do you choose to make the experiment? |
36691 | Would it not be clearer, if the opening in the shutter were enlarged, so as to admit more light? |
36691 | Would you call wood, and chalk, light or heavy bodies? |
36691 | You both, I suppose, have seen a pulley? |
36691 | You conceive that a body having length, breadth and depth, can not be without form, either symmetrical or irregular? |
36691 | You know the old saying, that a pound of feathers, is as heavy as a pound of lead? |
36691 | You recollect that law in mechanics? |
36691 | You see none of the balls except the last, appear to move, this flies off as far as the first ball fell; can you explain this? |
36691 | _ Caroline._ And from whence arises this difference, between elastic, and non- elastic fluids? |
36691 | _ Caroline._ And from whence proceeds the pressure of fluids upwards? |
36691 | _ Caroline._ And of what nature are the other two kinds of levers? |
36691 | _ Caroline._ And should not the sun appear smaller in summer, when it is so much further from us? |
36691 | _ Caroline._ And what is this singular circumstance, which seems to disturb the laws of nature? |
36691 | _ Caroline._ And, pray, why is the sky of a blue colour? |
36691 | _ Caroline._ Are not comets, in some respects similar to planets? |
36691 | _ Caroline._ Are you sure that it is not the glass, which covers the bell, that prevents our hearing it? |
36691 | _ Caroline._ As the three rays are parallel, why are they not all perpendicular to the mirror? |
36691 | _ Caroline._ But a top generally has a motion forwards besides its spinning motion; and then no point within it can be at rest? |
36691 | _ Caroline._ But do not the primary planets, sometimes eclipse the sun from each other, as they pass round in their orbits? |
36691 | _ Caroline._ But does not the attraction of the denser medium affect the ray before it touches it? |
36691 | _ Caroline._ But how are we to judge of the quantity of matter contained in a certain bulk? |
36691 | _ Caroline._ But if a machine is made of polished metal, as a watch for instance, the friction must be very trifling? |
36691 | _ Caroline._ But if it were possible to relieve me from the weight of the atmosphere, should I not feel more light and agile? |
36691 | _ Caroline._ But if we see all terrestrial objects by reflected light,( as we do the moon,) why do they appear so bright and luminous? |
36691 | _ Caroline._ But is it not very easy to find both the latitude and longitude of any place by a map or globe? |
36691 | _ Caroline._ But red and green mixed together, do not produce yellow? |
36691 | _ Caroline._ But since an image must be formed on the retina of each of our eyes, why do we not see objects double? |
36691 | _ Caroline._ But surely there can be no pores in ivory and metals, Mrs. B.; how then can they be susceptible of compression? |
36691 | _ Caroline._ But there is a spring in our grounds, which more frequently flows in dry, than in wet weather; how is that to be accounted for? |
36691 | _ Caroline._ But unless you can see the sun, how can you take its altitude? |
36691 | _ Caroline._ But, Mrs. B., if we see only the image of objects, why do we not see them reversed, as you showed us they were, in the camera obscura? |
36691 | _ Caroline._ But, Mrs. B., the grass is green, and the flowers are coloured, whether in the dark, or exposed to the light? |
36691 | _ Caroline._ But, if the sun really shines on every part of that sheet of water, why does not every part of it, reflect rays to my eyes? |
36691 | _ Caroline._ By friction, do you mean one part of the machine rubbing against another part contiguous to it? |
36691 | _ Caroline._ Do not the vanes of a windmill represent a wheel, Mrs. B.? |
36691 | _ Caroline._ Do you mean to say, that the action of the body which strikes, is returned with equal force by the body which receives the blow? |
36691 | _ Caroline._ Does attraction act on water more powerfully than on land? |
36691 | _ Caroline._ Has the experiment been made in these different situations? |
36691 | _ Caroline._ How is that possible? |
36691 | _ Caroline._ I can not conceive how these colours, mixed together, can become white? |
36691 | _ Caroline._ I have heard so, but do you not think such an opinion too great a stretch of the imagination? |
36691 | _ Caroline._ I should then imagine that it would fall, quicker than it rose? |
36691 | _ Caroline._ I thought that perpendicularly meant either directly upwards or downwards? |
36691 | _ Caroline._ I understand that perfectly; but what is the meaning of the other point B? |
36691 | _ Caroline._ I understand that very well; and is not this the reason that oars appear bent in the water? |
36691 | _ Caroline._ In drawing a view from nature, it seems that we do not copy the real objects, but the image they form on the retina of our eyes? |
36691 | _ Caroline._ In that case we can not see her, for she must rise in the day time? |
36691 | _ Caroline._ In the torrid zone, then, I hope you will grant that the moon is immediately over, or opposite the spots where it is high water? |
36691 | _ Caroline._ Is it for this reason that wheels are greased, and the locks and hinges of doors oiled? |
36691 | _ Caroline._ Is light then a substance composed of particles, like other bodies? |
36691 | _ Caroline._ Is not sound produced by solid bodies? |
36691 | _ Caroline._ My head then moves faster than my feet; and upon the summit of a mountain, we are carried round quicker than in a valley? |
36691 | _ Caroline._ On what then can we rely, for do we not receive all our ideas through the medium of our senses? |
36691 | _ Caroline._ Pray by what means is this receiver exhausted of its air? |
36691 | _ Caroline._ Pray what are the planets? |
36691 | _ Caroline._ Pray what is the distinction between a fluid and a liquid? |
36691 | _ Caroline._ Pray, Mrs. B., do the two scales of a balance hang parallel to each other? |
36691 | _ Caroline._ Pray, Mrs. B., is not the leather, which covers the opening, in the lower board of a pair of bellows, a kind of valve? |
36691 | _ Caroline._ Pray, Mrs. B., is not the thermometer constructed on the same principles as the barometer? |
36691 | _ Caroline._ Pray, what is the meaning of focus? |
36691 | _ Caroline._ That is very clear, but supposing the two forces to be unequal, that the force X, for instance, be twice as great as the force Y? |
36691 | _ Caroline._ The axle of a grindstone, is then the axis of its motion; but is the centre of motion always in the middle of a body? |
36691 | _ Caroline._ The weight and the fulcrum have here changed places; and what advantage is gained by this kind of lever? |
36691 | _ Caroline._ Then the larger the wheel, in proportion to the axle, the greater must be its effect? |
36691 | _ Caroline._ Then the more distant planets, move much slower in their orbits; for their projectile force must be proportioned to that of attraction? |
36691 | _ Caroline._ Then why does it not, like all other bodies, fall to the ground? |
36691 | _ Caroline._ There must be a great number of eclipses in the distant planets, which have so many moons? |
36691 | _ Caroline._ This explanation of the monsoons is very curious; but what does their breaking up mean? |
36691 | _ Caroline._ This figure renders it very clear: then two bodies can not fall to the earth in parallel lines? |
36691 | _ Caroline._ This is extremely curious; but why should brown paper, absorb more rays, than white paper? |
36691 | _ Caroline._ This rose: look at it, Mrs. B., and tell me whether it is possible to deprive it of its beautiful colour? |
36691 | _ Caroline._ What colour do you suppose them to be, then, in the dark? |
36691 | _ Caroline._ What is the reason that articles which are blue, often appear green, by candle- light? |
36691 | _ Caroline._ What, the pendulum of a clock? |
36691 | _ Caroline._ When a stick is poised on the tip of the finger, is it not by supporting its centre of gravity? |
36691 | _ Caroline._ Why do you observe the temperature of the room, in estimating the weight of the air? |
36691 | _ Caroline._ Why do you wet the bladder first? |
36691 | _ Caroline._ Why not quite as high? |
36691 | _ Caroline._ Why then does one side of the house appear to be in sunshine, and the other in shade? |
36691 | _ Caroline._ Why then does the air feel so heavy, in bad weather? |
36691 | _ Caroline._ Why then should not mirrors be made simply of mercury? |
36691 | _ Caroline._ You do not mean to say, that we see only the representation of the object, which is painted on the retina, and not the object itself? |
36691 | _ Emily._ And are not fountains, of the nature of springs? |
36691 | _ Emily._ And at what height, will the weight of the atmosphere sustain the mercury? |
36691 | _ Emily._ And for what reason? |
36691 | _ Emily._ And how do you ascertain the specific gravity of fluids? |
36691 | _ Emily._ And how do you know which colours bodies have a tendency to reflect, or which to absorb? |
36691 | _ Emily._ And how much longer is the sidereal, than the solar year? |
36691 | _ Emily._ And is it thus, that the picture of objects, is painted on the retina of the eye? |
36691 | _ Emily._ And is light, in its reflection, governed by the same laws, as solid, elastic bodies? |
36691 | _ Emily._ And is no inconvenience experienced, from the thinness of the air, in such elevated situations? |
36691 | _ Emily._ And is there any considerable difference between solar time, and true time? |
36691 | _ Emily._ And may we not say that gravity is the force which occasions the fall of bodies? |
36691 | _ Emily._ And of what length is a degree of latitude? |
36691 | _ Emily._ And pray, have the other planets the same vicissitudes of seasons, as the earth? |
36691 | _ Emily._ And when shall we learn them? |
36691 | _ Emily._ And yet a pair of scales, hanging perpendicular to the earth, appear parallel? |
36691 | _ Emily._ Are not the eclipses of the sun produced by the moon passing between the sun and the earth? |
36691 | _ Emily._ Are the trumpets used as musical instruments, also constructed on this principle? |
36691 | _ Emily._ But are there not some bodies which have exactly the same specific gravity as water? |
36691 | _ Emily._ But can we not ascertain the weight of a small quantity of air? |
36691 | _ Emily._ But do not the rays which are projected in different directions, and cross each other, interfere, and impede each other''s course? |
36691 | _ Emily._ But does not every part of the earth move with the same velocity? |
36691 | _ Emily._ But each set of these irregular vibrations, if repeated alone, and at equal intervals, would, I suppose, produce a musical tone? |
36691 | _ Emily._ But have we not just seen the ray of light, in its passage from the sun to the mirror, and its reflections? |
36691 | _ Emily._ But how do they contrive to regulate their time in the equatorial and polar regions? |
36691 | _ Emily._ But how does a prism separate these coloured rays? |
36691 | _ Emily._ But if the air moves backwards, as well as forwards, how can its motion extend so as to convey sound to a distance? |
36691 | _ Emily._ But if the tube through which the water rises be smooth, can there be any friction? |
36691 | _ Emily._ But is that side of the house yonder, which appears to be in shadow, really illuminated by the sun, and its rays reflected another way? |
36691 | _ Emily._ But may it not be objected to pulleys, that a longer time is required to raise a weight by their aid, than without it? |
36691 | _ Emily._ But since this watery vapour is lighter than the air, why does it not continue to rise; and why does it unite again, to form clouds? |
36691 | _ Emily._ But the quantity must really be diminished? |
36691 | _ Emily._ But they may see our sun as we do theirs, in appearance a fixed star? |
36691 | _ Emily._ But were you to penetrate deep into the earth, would gravity increase as you approached the centre? |
36691 | _ Emily._ Can a mirror form more than one focus, by reflecting rays? |
36691 | _ Emily._ Can it be the attraction of the earth? |
36691 | _ Emily._ Can not the power of the screw be increased also, by lengthening the lever attached to the nut? |
36691 | _ Emily._ Does not the air pump, which you used in the experiments, on pneumatics, operate upon the same principles as the sucking pump? |
36691 | _ Emily._ How can the angles be equal, while the lines which compose them are of unequal length? |
36691 | _ Emily._ How is it that the rain water does not continue to descend by its gravity, instead of collecting together, and forming springs? |
36691 | _ Emily._ I have heard much of the violent tempests, occasioned by the breaking up of the monsoons; are not they also regular trade- winds? |
36691 | _ Emily._ I think I can trace a consequence from these different situations of the earth; are not they the cause of summer and winter? |
36691 | _ Emily._ I thought that the earth performed one complete revolution in its orbit, every year; what is the reason of this variation? |
36691 | _ Emily._ I thought the sun had no motion? |
36691 | _ Emily._ If so, how is it possible to prove that they are endowed with this power? |
36691 | _ Emily._ If the ecliptic relates only to the heavens, why is it described upon the terrestrial globe? |
36691 | _ Emily._ If the fixed stars are suns, with planets revolving round them, why should we not see those planets as well as their suns? |
36691 | _ Emily._ If you throw a stone perpendicularly upwards, is it not the same length of time in ascending, that it is in descending? |
36691 | _ Emily._ If, then, we are driven by one power, and drawn by the other to this centre of destruction, how is it possible for us to escape? |
36691 | _ Emily._ In what direction does the water attract the ray? |
36691 | _ Emily._ Is it not because the vicinity of the primary planets, renders their attraction stronger than that of the sun? |
36691 | _ Emily._ Is it not in consequence of refraction, that the glasses in common spectacles, magnify objects seen through them? |
36691 | _ Emily._ Is it not similar to the syringe, or squirt, with which you first draw in, and then force out water? |
36691 | _ Emily._ Is it not surprising that nature should have furnished us with such disadvantageous levers? |
36691 | _ Emily._ Is there then no difference between rain water, and spring water? |
36691 | _ Emily._ It would then be much more difficult to work a machine under water than in the air? |
36691 | _ Emily._ Oh yes; I see it slowly creeping up the tube, but now it is stationary: will it rise no higher? |
36691 | _ Emily._ Pray what is the reason that the tide is three- quarters of an hour later every day? |
36691 | _ Emily._ Pray, Mrs. B., by what rule do you estimate the power of the screw? |
36691 | _ Emily._ Pray, Mrs. B., can not the sun''s rays be collected to a focus by a lens, in the same manner as they are by a concave mirror? |
36691 | _ Emily._ Pray, Mrs. B., what are the constellations? |
36691 | _ Emily._ Pray, do not glass windows, refract the light? |
36691 | _ Emily._ Pray, how is the sound of an echo produced? |
36691 | _ Emily._ Pray, is not a magic lanthorn constructed on the same principles? |
36691 | _ Emily._ Pray, what is the reason that we can not see an object distinctly, if we place it very near to the eye? |
36691 | _ Emily._ Pray, why does the sun appear red, through a fog? |
36691 | _ Emily._ Since dark bodies, absorb more solar rays than light ones, the former should sooner be heated if exposed to the sun? |
36691 | _ Emily._ Since it is impossible, in this case, to make the object approach the eye, can not we by means of a lens bring an image of it, nearer to us? |
36691 | _ Emily._ Since the air is a gravitating fluid, is it not affected by the attraction of the moon and the sun, in the same manner as the waters? |
36691 | _ Emily._ So it appears: yet I have seen a cylinder of wood roll up a slope; how is that contrived? |
36691 | _ Emily._ Such as a piece of broken china, or glass? |
36691 | _ Emily._ That is very extraordinary; and how then do you account for the heat being greatest, when we are most distant from the sun? |
36691 | _ Emily._ The attraction of cohesion is then, I suppose, less powerful in fluids, than in solids? |
36691 | _ Emily._ The hinges represent the fulcrum, our hands the power applied to the other end of the lever; but where is the weight to be moved? |
36691 | _ Emily._ The moon, Mrs. B., appears to move in a different direction, and in a different manner from the stars? |
36691 | _ Emily._ Then when we want to lift a great weight, we must fasten it to the shortest arm of a lever, and apply our strength to the longest arm? |
36691 | _ Emily._ There are then other kinds of air, besides the atmosphere? |
36691 | _ Emily._ These divergent rays, issuing from a single point, I believe you told us, were called a pencil of rays? |
36691 | _ Emily._ This is one of the advantages of carriage wheels, is it not? |
36691 | _ Emily._ To what extent must I open the compasses? |
36691 | _ Emily._ What does that mean? |
36691 | _ Emily._ When the moon eclipses the sun to us, we must be eclipsed to the moon? |
36691 | _ Emily._ When water runs out of the side of a vessel, is it not owing to the weight of the water, above the opening? |
36691 | _ Emily._ When you speak of the sun''s motion, you mean, I suppose, his apparent motion, produced by the diurnal motion of the earth? |
36691 | _ Emily._ Yet they actually touch each other? |
36691 | _ Emily._ You astonish me: surely you do not mean to say that large bodies attract each other? |
36691 | _ Emily._ You hold the wire awry, I suppose, in order to show that the axis of the earth is not upright? |
36691 | and are colours less beautiful, for being accidental, rather than essential properties of bodies? |
36691 | and how does she accompany the earth? |
36691 | and were to strike the ball A, at the same instant; would it not move? |
36691 | and what their uses? |
36691 | and why not? |
36691 | are, I suppose, less powerful in their refractions? |
36691 | have bodies no weight? |
36691 | how can you put the two bodies of different weight within the glass, without admitting the air? |
36691 | how could that answer the purpose? |
36691 | is there another species of gravity, with which we are not yet acquainted? |
36691 | make a light body balance a heavy one? |
36691 | must I not exert ten times as much strength to draw the larger one to me, in the same space of time, as is required for the smaller one? |
36691 | operate? |
36691 | represent, and what are its extremities called? |
36691 | that is an excellent thought, Emily; will you stand the test, Mrs. B.? |
36691 | to what height will it ascend, and what will it form? |
36691 | weight with ten times the force that it does that of 100 lbs.? |
36691 | what is the inclination of her orbit? |
36691 | what would result? |
36691 | when I ring this little bell, is it the air that sounds, and not the bell? |