Principles of Natural Philosophy, Or, A New Theory of Physics: Founded on Gravitation, and Applied in Explaining the General Properties of Matter, the Phenomena of Chemistry, Electricity, Galvanism, Magnetism, & Electro-magnetismLongman, Rees, Orme, Brown and Green, 1829 - 478 |
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Strona vii
... remain at rest , and those which are in motion to continue that motion uniformly in a straight line ; were there no tendency of this kind , there would be no such changes in the state of bodies as we observe , and the resistance , which ...
... remain at rest , and those which are in motion to continue that motion uniformly in a straight line ; were there no tendency of this kind , there would be no such changes in the state of bodies as we observe , and the resistance , which ...
Strona 6
... remain in the same state in which it is put at first ( ax . 2 ) ; but if acted on by unequal opposite forces , or by one single force , its original state will be changed ( ax . 3. ) ; susceptible of all imaginable degrees of therefore ...
... remain in the same state in which it is put at first ( ax . 2 ) ; but if acted on by unequal opposite forces , or by one single force , its original state will be changed ( ax . 3. ) ; susceptible of all imaginable degrees of therefore ...
Strona 7
... remain in that state , since its constituent forces are equal on all its sides ( post . 1. and ax . 2. ) 2. If it be in motion it cannot of itself go out of the straight line in which it moves , because the forces are equal and opposite ...
... remain in that state , since its constituent forces are equal on all its sides ( post . 1. and ax . 2. ) 2. If it be in motion it cannot of itself go out of the straight line in which it moves , because the forces are equal and opposite ...
Strona 10
... remains , and before there can be any further change a new action and re - action must take place . PROP . 6. The force of an atom acting on another , not in the surface of its spherule , varies as its absolute force directly , and the ...
... remains , and before there can be any further change a new action and re - action must take place . PROP . 6. The force of an atom acting on another , not in the surface of its spherule , varies as its absolute force directly , and the ...
Strona 14
... remain in that situ- ation , and be retained in it by the force m + m since it will require a greater force than this , either to bring them nearer together , or to produce a separation . If the radii are unequal , r being greater than ...
... remain in that situ- ation , and be retained in it by the force m + m since it will require a greater force than this , either to bring them nearer together , or to produce a separation . If the radii are unequal , r being greater than ...
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Popularne fragmenty
Strona xx - All these things considered [that is, the chemical facts he had just recited], 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...
Strona vi - To this purpose the philosophers say that Nature does nothing in vain, and more is in vain when less will serve; for Nature is pleased with simplicity, and affects not the pomp of superfluous causes.
Strona xx - 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 various Separations and new Associations and Motions of these permanent Particles : compound Bodies being apt to break, not in the midst of solid Particles, but where those particles are laid together and only touch in a few Points.
Strona vi - The qualities of bodies, which admit neither intension nor remission of degrees, and which are found to belong to all bodies within the reach of our experiments, are to be esteemed the universal qualities of all bodies whatsoever.
Strona vi - RULE IV. In experimental philosophy, we are to look upon propositions collected by general induction from phenomena as accurately, or very nearly true, notwithstanding any contrary hypothesis that may be imagined, till such time as other phenomena occur, by which they may either be made more accurate, or liable to exceptions...
Strona xix - All these things being considered, it seems probable to me, that God in the beginning formed matter, in solid, massy, hard, inpenetrable, 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 formed...
Strona 319 - Experiments analogous to the former, and equally simple, may also be made with many metallic solutions. If, for instance, the solution contains copper, it will be precipitated by a piece of iron, and appear on its surface. Upon silver merely immersed in the same solution, no such effect is produced ; but, as soon as the two metals are brought into contact, the silver receives a coating of copper.
Strona xxii - is not deduced from phenomena, is to be called an hypothesis : and hypotheses, whether physical or metaphysical, whether of occult qualities or mechanical, have no place in experimental philosophy.
Strona xx - While the 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...
Strona 474 - Os homini sublime dedit, — ccelumque tueri Jussit, — et erectos ad sidera — tollere vultus.