The Correlation and conservation of forces

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D. Appleton & Company, 1868 - 438 pàgines
 

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Pàgina 340 - That gravity should be innate, inherent and essential to matter, so that one body may act upon another at a distance through a vacuum, without the mediation of anything else, by and through which their action and force may be conveyed from one to another, is to me so great an absurdity, that I believe no man who has in philosophical matters a competent faculty of thinking, can ever fall into it.
Pàgina xxiii - It is hardly necessary to add that anything which any insulated body, or system of bodies, can continue to furnish without limitation, cannot possibly be a material substance; and it appears to me to be extremely difficult, if not quite impossible, to form any distinct idea of anything capable of being excited and communicated in the manner the Heat was excited and communicated in these experiments, except it be MOTION.
Pàgina xxii - ACTUALLY BOILED ! It would be difficult to describe the surprise and astonishment expressed in the countenances of the bystanders, on seeing so large a quantity of cold water heated, and actually made to boil, without any fire.
Pàgina xxxvi - How this metamorphosis takes place — how a force existing as motion, heat, or light, can become a mode of consciousness — how it is possible for aerial vibrations to generate the sensation we call sound, or for the forces liberated by chemical changes in tho brain to give rise to emotion — these are mysteries which it is impossible to fathom.
Pàgina 85 - 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 towards one another, whatsoever be the Cause.
Pàgina 66 - But nature makes that mean : so, over 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.
Pàgina 204 - ... and apparatus generate no force, but simply yield up the power communicated to them by natural forces — falling water, moving wind, or by the muscles of men and animals. After this law had been established by the great mathematicians of the last century, a perpetual motion, which should make only use of pure mechanical forces, such as gravity, elasticity, pressure of liquids and gases, could only be sought after by bewildered and ill-instructed people. But there are still other natural forces...
Pàgina xxxvi - ... consciousness — how it is possible for aerial vibrations to generate the sensation we call sound, or for the forces liberated by chemical changes in the brain to give rise to emotion — these are mysteries which it is impossible to fathom. But they are not profounder mysteries than the transformations of the physical forces into each other. They are not more completely beyond our comprehension than the natures of Mind and Matter. They have simply the same insolubility as all other ultimate...
Pàgina 123 - 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?
Pàgina 108 - Venus is nearer to the sun than the earth, that planet is hotter than our globe. The force emitted by the sun may take a different character at the surface of each different planet, and require different organisms or senses for its appreciation. Myriads of organised beings may exist imperceptible to our vision, even if we were among them...

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