The Correlation of Physical Forces

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Longman, Green, Longman, Roberts, & Green, 1862 - Всего страниц: 284
 

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Стр. 101 - Yet nature is made better by no mean, But nature makes that mean: so, o'er that art, Which you say adds to nature, is an art That nature makes. You see, sweet maid, we marry A gentler scion to the wildest stock, And make conceive a bark of baser kind By bud of nobler race: this is an art Which does mend nature, — change it rather; but The art itself is nature.
Стр. 128 - How these attractions may be performed, I do not here consider. What I call 'attraction' may be performed by impulse, or by some other means unknown to me. I use that word here to signify only in general any force by which bodies tend toward one another, whatsoever be the cause.
Стр. 184 - Are not gross bodies and light convertible into one another, and may not bodies receive much of their activity from the particles of, light which enter their composition?
Стр. 161 - Myriads of organised beings may exist imperceptible to our vision, even if we were among them ; and we might be also imperceptible to them! However vain it may be, in the present state of science, to speculate upon such existences, it is equally vain to assume identity or close approximations to our own forms in those beings which may people other worlds.
Стр. 271 - In all phenomena the more closely they are investigated the more are we convinced that, humanly speaking, neither matter nor force can be created or annihilated, and that an essential cause is unattainable. — Causation is the will. Creation the act, of God.
Стр. xiii - ... electricity magnetism ; and so of the rest. Cause and effect, therefore, in their abstract relation to these forces, are words solely of convenience : we are totally unacquainted with the ultimate generating power of each and all of them, and probably shall ever remain so ; we can only ascertain the normas of their action : we must humbly refer their causation to one omnipresent influence, and content ourselves with studying their effects and developing by experiment their mutual relations.
Стр. 232 - ... thus get a reciprocity of action between the force which unites the molecules of matter and the magnetic force, and through the medium of the latter the correlation of the attraction of aggregation with the other modes of force may be established.
Стр. x - The discovery of (Ersted, by which electricity was made a source of Magnetism, soon led philosophers to seek the converse effect ; that is, to educe Electricity from a permanent magnet : — had these experimentalists succeeded in their expectations of making a stationary magnet a source of electric-currents, they would have realised the ancient dreams of perpetual motion, they would have converted statics into dynamics, they would have produced power without expenditure ; in other words, they would...
Стр. 266 - ... our evidence of force is the matter it acts upon. Thus, matter and force are correlates, in the strictest sense of the word ; the conception of the existence of the one involves the conception of the existence of the other : the quantity of matter again, and the degree of force, involve conceptions of space and time.
Стр. 234 - ... same time imparting a fraction of it to each of its progeny. In this mode of viewing the subject, all the organizing force required to build up an Oak or a Palm, an Elephant or a Whale, must be concentrated in a minute particle, only discernible by microscopic aid...

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