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absolute analysis anomy assert associated assortative mating atom blended inheritance bodies brain cause ception chapter character classify conceive conception consciousness corpuscles correlation curve definition describe direction earth element equal ether ether-elements evolution existence fertility field force formula geometrical gross matter groups of sense-impressions heredity hodograph human ideal Ignorabimus immediate sense-impression impressions individual infer inheritance knowledge laws of motion limit logical mass mean mean curvature measure mechanism mental metaphysical mind mode molecules moving mutual accelerations natural law natural selection observed offspring organs origin of species particles past perceive perceptive faculty perceptual experience phenomena physical physicist possible postulate present prime-atom probably problems reader reality reason recognised relative position result routine of perceptions scientific law scientific method sense social space speed sphere stage stored sense-impressions suppose tangent term theory thing-in-itself things thought tion ultimately universe validity variability velocity word
Page 324 - To every action there is always an equal and contrary reaction ; or the mutual actions of any two bodies are always equal and oppositely directed.
Page 32 - The world little knows how many of the thoughts and theories which have passed through the mind of a scientific investigator have been crushed in silence and secrecy by his own severe criticism and adverse examination ; that in the most successful instances not a tenth of the suggestions, the hopes, the wishes, the preliminary conclusions have been realized.
Page 33 - ... 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 280 - Thus molecular science sets us face to face with physiological theories. It forbids the physiologist from imagining that structural details of infinitely small dimensions can furnish an explanation of the infinite variety which exists in the properties and functions of the most minute organisms.
Page 250 - So, naturalists observe, a flea Has smaller fleas that on him prey; And- these have smaller still to bite 'em, And so proceed ad infinitum.
Page 12 - The man who classifies facts of any kind whatever, who sees their mutual relation and describes their sequences, is applying the scientific method and is a man of science. The facts may belong to the past history of mankind, to the social statistics of our great cities, to the atmosphere of the most distant stars, to the digestive organs of a worm, or to the life of a scarcely visible bacillus.
Page 456 - In the tenth generation a man has [theoretically] 1024 tenth great-grandparents. He is eventually the product of a population of this size, and their mean can hardly differ from that of the general population. It is the heavy weight of this mediocre ancestry which causes the son of an exceptional father to regress towards the general population mean ; it is the balance of this sturdy commonplaceness which enables the son of a degenerate father to escape the whole burden of the parental ill.
Page 86 - Law in the scientific sense is thus essentially a product of the human mind and has no meaning apart from man.
Page 298 - We ought then to regard the present state of the universe as the effect of its anterior state and as the cause of the one which is to follow. Given for one instant an intelligence which could comprehend all the forces by which nature is animated and the respective situation of the beings who compose it — an intelligence sufficiently vast to submit these data to analysis...