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algebraical animal atomic biology bodies calculation cell century chapter chemical chemistry Claude Bernard Clausius conception Cuvier Darwin definite discovery doctrine dynamics electric elements energy ether existence fact Faraday force forms France Fresnel functions fundamental Gauss generalisation genetic view geometry Germany Goethe heat Helmholtz Herbert Spencer Huxley ibid ideas important influence interest introduced J. J. Thomson Joule kinetic labours Lamarck Laplace Lectures Leibniz Leipzig light lines living matter Lord Kelvin luminiferous ether magnetic mathe mathematical matical Maxwell mechanical memoir ment methods mind modern molecules morphological motion natural philosophy natural selection naturalists notably observation optical organic Origin of Species original Pangenesis phenomena philosophical physical physiology principle problem processes Prof properties psycho-physical psychology purely quantity question reasoning recognised referred says scientific species statistical substance suggested term theory things thinkers Thomson thought tion treatise view of nature writings
Page 331 - I happened to read for amusement ' Malthus on Population,' and being well prepared to appreciate the struggle for existence which everywhere goes on from long-continued observation of the habits of animals and plants, it at once struck me that under these circumstances favourable variations would tend to be preserved, and unfavourable ones to be destroyed. The result of this would be the formation of new species. Here then I had at last got a theory by which to work...
Page 325 - On the Power, Wisdom, and Goodness of God, as manifested in the Creation ; illustrating such work by all reasonable arguments, as for instance the variety and formation of God's creatures in the animal, vegetable, and mineral kingdoms ; the effect of digestion, and thereby of conversion ; the construction of the hand of man, and an infinite variety of other arguments ; as also by discoveries ancient and modern, in arts, sciences, and the whole extent of literature.
Page 293 - But if the succession of worlds is established in the system of nature, it is in vain to look for anything higher in the origin of the earth. The result, therefore, of this physical inquiry is, that we find no vestige of a beginning, — no prospect of an end"§.
Page 473 - Suppose a man born blind, and now adult, and taught by his touch to distinguish between a cube and a sphere of the same metal, and nighly of the same bigness, so as to tell, when he felt one and the other, which is the cube, which the sphere. Suppose then the cube and sphere placed on a table, and the blind man to be made to see; quaere, whether by his sight, before he touched them, he could now distinguish and tell which is the globe, which the cube?
Page 695 - It is hard to imagine why at the end of the eighteenth century, and at the beginning of the nineteenth...
Page 288 - And thus there is suggested the conception of a past during which there have been successive Evolutions analogous to that which is now going on; and a future during which successive other such Evolutions may go on — ever the same in principle but never the same in concrete result.
Page 103 - 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.
Page 131 - It is impossible by means of inanimate material agency to derive mechanical effect from any portion of matter by cooling it below the temperature of the coldest of the surrounding objects.
Page 81 - If the results of mere speculation which I have collected are found to be of any use to experimental philosophers, in arranging and interpreting their results, they will have served their purpose, and a mature theory, in which physical facts will be physically explained, will be formed by those who by interrogating Nature herself can obtain the only true solution of the questions which the mathematical theory suggests.