The Correlation and Conservation of Forces: A Series of ExpositionsD. Appleton, 1865 - 438 ページ |
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according æther amount of heat animal appear assume asteroid atmosphere attraction become binary compounds bodies carbonic acid cause centimetres chemical action chemical affinity combination combustion compounds conservation of force correlation definite degree developed direction distance duced earth effect electric current electricity equal equivalent ether existence expansion experiments expression fact fall fluid friction glass gravity greater hydrogen increase instance iron Joule kilogrammes latent latent heat liquid magnetism mass matter mechanical force metal metres mode of force molecular move nature ordinary organic original oxygen particles perpetual motion phenomena Phil physical piston planets plate platinum polarised portion present principle produced quantity of heat question radiation raised rays regard relation rotation solar solar radius space specific heat substance sun's supposed surface temperature theory tion Trans tricity vapour velocity vis viva viva voltaic voltaic arc weight wire zinc
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366 ページ - 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.
99 ページ - 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.
xxiii ページ - 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.
xxiii ページ - By meditating on the results of all these experiments, we are naturally brought to that great question which has so often been the subject of speculation among philosophers, namely, What is heat — is there any such thing as an igneous fluid ? Is there anything that...
xl ページ - Deeper than demonstration — deeper even than definite cognition — deep as the very nature of mind, is the postulate at which we have arrived. Its authority transcends all other whatever ; for not only is it given in the constitution of our own consciousness, but it is impossible to imagine a consciousness so constituted as not to give it.
122 ページ - 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...
xxii ページ - 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.
252 ページ - Two classes of causes occur in nature, which, so far as experience goes, never pass one into another. The first class consists of such causes as possess the properties of weight and impenetrability; these are kinds of Matter: the other class is made up of causes which are wanting in the properties just mentioned, namely Forces, called also Imponderables, from the negative property that has been indicated.
232 ページ - ... refer such a rich source of heat and light, that there is no necessity whatever to take refuge in the idea of a store of these forces originally existing. When, through condensation of the masses, their particles came into collision and clung to each other, the vi-s viva of their motion would be thereby annihilated, and must reappear as heat. Already in old theories it has been calculated that cosmical masses must generate heat by their collision, but it was far from anybody's thought to make...
246 ページ - Roman sword awakes in us the conception of grey antiquity. What the museums of Europe show us of the remains of Egypt and Assyria we gaze upon with silent astonishment, and despair of being able to carry our thoughts back to a period so remote.