The Elements of Physics |
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Page 59
... distance from each other , as at London and Paris , the directions of gravity are inclined to each other . For the surface of still water at these places being portions of parallel spherical surfaces , or very nearly so , the ...
... distance from each other , as at London and Paris , the directions of gravity are inclined to each other . For the surface of still water at these places being portions of parallel spherical surfaces , or very nearly so , the ...
Page 65
... distances the muzzle of a gun must be elevated considerably above the level of the point which is to be hit ; some ... distance to which it will go , before reaching the earth , depends on the force of projection , and on the height of ...
... distances the muzzle of a gun must be elevated considerably above the level of the point which is to be hit ; some ... distance to which it will go , before reaching the earth , depends on the force of projection , and on the height of ...
Page 67
... distance equal to two - thirds its whole length . The practical method of determining the centre of gravity of a plain figure like the preceding , is exceed- ingly simple . Let it be hung up by any point , as the angular point A , for ...
... distance equal to two - thirds its whole length . The practical method of determining the centre of gravity of a plain figure like the preceding , is exceed- ingly simple . Let it be hung up by any point , as the angular point A , for ...
Page 73
... distance of the centre of gravity from the supporting plane does not vary . When- ever then the supporting ray , or the line drawn from the centre of gravity to the point of contact , is a minimum , or less than the rays on each side of ...
... distance of the centre of gravity from the supporting plane does not vary . When- ever then the supporting ray , or the line drawn from the centre of gravity to the point of contact , is a minimum , or less than the rays on each side of ...
Page 75
... distance B C D , by which the pendulum is moved from its position of rest , is called the extent or am- plitude of the oscillation ; and the time which the body takes in descending or in ascending , is the time of half an oscillation ...
... distance B C D , by which the pendulum is moved from its position of rest , is called the extent or am- plitude of the oscillation ; and the time which the body takes in descending or in ascending , is the time of half an oscillation ...
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Common terms and phrases
action angle angle of incidence appears atmosphere attraction axis ball body cause centre of gravity colours column conductor consequently considered convex lens crystal crystalline lens density direction distance double refraction earth effect elastic force electricity electromotive force equal equilibrium evaporation exerted exist experiments fluid glass greater hence inches incidence instance intensity iron isochronism laws length lens less light liquid luminous magnetic mass mercury metal mirror motion moving nature needle object observed ordinary ray orifice oscillation parallel particles passes pencil pendulum perpendicular phenomena plane poles portion position preceding pressure principles prism produced propagated properties rays reflected reflexion refraction remarkable resinous seen sensible shew shewn side solid sound space spectrum string substance suppose surface takes place temperature theory thermometer tion tricity tube vapour velocity vessel vibrations violet vitreous vitreous fluid wave weight zinc
Popular passages
Page 16 - ... it seems probable to me that God in the beginning formed matter in solid, massy, hard, impenetrable, movable particles, of such sizes and figures, and with such other properties and in such proportion to space as most conduced to the end for which He formed them; and that these primitive particles, being solids, are incomparably harder than any porous bodies compounded of them, even so very hard as never to wear or break in pieces — no ordinary power being able to divide what God himself made...
Page 15 - All these things being consider'd, it seems probable to me, that God in the Beginning form'd Matter in solid, massy, hard, impenetrable, moveable Particles, of such Sizes and Figures, and with such other Properties, and in such Proportion to Space, as most conduced to the End for which he form'd them...
Page 359 - Every ray of light in its passage through any refracting surface, is put into a certain transient constitution or state; which, in the progress of the ray, returns at equal intervals, and disposes the ray at every return to be easily transmitted through the next refracting surface ; and between the returns to be easily reflected by it.
Page 280 - The immediate cause of the phenomena of heat, then, is motion, and the laws of its communication are precisely the same as the laws of the communication of motion.
Page 281 - ... greatest in the last, the particles have a motion round their own axes, with different velocities, the particles of elastic fluids moving with the greatest quickness ; and that in...
Page 360 - ... hot; that the vibrations thus excited are propagated in the refracting or reflecting medium or substance, much after the manner that vibrations are propagated in the air for causing sound, and move faster than the rays so as to overtake them...
Page 91 - that every particle of matter in the universe attracts every other particle, with a force whose direction is that of the line joining the two, and whose magnitude is directly as the product of their masses, and inversely as the square of their distances from each other.
Page 16 - Particles continue entire, they may compose Bodies of one and the same Nature and Texture in all Ages: But should they wear away, or break in pieces, the Nature of Things depending on them, would be changed. Water and Earth composed of old worn Particles and Fragments of Particles, would not be of the same Nature and Texture now, with Water and Earth composed of entire Particles, in the Beginning. And therefore that Nature may be lasting, the Changes of corporeal Things are to be placed only in the...
Page 281 - It seems possible to account for all the phenomena of heat, if it be supposed that in solids the particles are in a constant state of vibratory motion, the particles of the hottest bodies moving with the greatest velocity and through the greatest space ; that in...
Page 490 - ... some of those innumerable beautiful productions it casts up with lavish prodigality, but whose acquisition can be regarded as no diminution of the treasures that remain.