The Elements of Physics |
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Page 20
... glass , which is very brittle , but also highly elastic . The hardness of any solid must be carefully distinguished from its resistance to compression . The diamond is the hardest known substance , not because if it be laid on a piece ...
... glass , which is very brittle , but also highly elastic . The hardness of any solid must be carefully distinguished from its resistance to compression . The diamond is the hardest known substance , not because if it be laid on a piece ...
Page 21
... glass . Ductility is the property which some metals possess of being drawn out into wires ; it is very different from the preceding , since metals which cannot be hammered far without fracture or interruption of the continuity of the ...
... glass . Ductility is the property which some metals possess of being drawn out into wires ; it is very different from the preceding , since metals which cannot be hammered far without fracture or interruption of the continuity of the ...
Page 22
... glass is most beautiful ; the work- men will draw out most delicate threads , which lying together in pieces might be mistaken for the natural hair . That state of a body which is expressed by the term brittle- ness is entirely opposed ...
... glass is most beautiful ; the work- men will draw out most delicate threads , which lying together in pieces might be mistaken for the natural hair . That state of a body which is expressed by the term brittle- ness is entirely opposed ...
Page 24
... glass plate , and viewed with a powerful microscope , the regular figures will be seen in the act of formation . But stones have also their regular crystalline forms ; that beautiful transparent 24 CHAP . III . ELEMENTS OF PHYSICS .
... glass plate , and viewed with a powerful microscope , the regular figures will be seen in the act of formation . But stones have also their regular crystalline forms ; that beautiful transparent 24 CHAP . III . ELEMENTS OF PHYSICS .
Page 52
... may be fired through a door which swings easily on its hinges without moving it , and a bullet will pass through a pane of glass * Art . 20 . making a hole of its own size ; in these 52 CHAP . IV . ELEMENTS OF PHYSICS .
... may be fired through a door which swings easily on its hinges without moving it , and a bullet will pass through a pane of glass * Art . 20 . making a hole of its own size ; in these 52 CHAP . IV . ELEMENTS OF PHYSICS .
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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.