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61 페이지 - ... and perhaps, in addition to that, you notice the impress of a hob-nailed shoe on the gravel outside. All these phenomena have struck your attention instantly, and before two seconds have passed you say, " Oh, somebody has broken open the window, entered the room, and run off with the spoons and the tea-pot ! " That speech is out of your mouth in a moment.
57 페이지 - And it is imagined by many, that the operations of the common mind can be by no means compared with these processes, and that they have to be acquired by a sort of special apprenticeship to the craft. To hear all these large words, you would think that the mind of a man of science must be constituted differently from that of his...
56 페이지 - The method of scientific investigation is nothing but the expression of the necessary mode of working of the human mind.
65 페이지 - Laplace in their endeavours to discover and define the causes of the movements of the heavenly bodies, as you, with your own common sense, would employ to detect a burglar. The only difference is, that the nature of the inquiry being more abstruse, every step has to be most carefully watched, so that there may not be a single crack or flaw in your hypothesis. A flaw or crack in many of the hypotheses of daily life may be of little or no moment as affecting the general correctness of the conclusions...
65 페이지 - So that in science, where the evidence of an hypothesis is subjected to the most rigid examination, we may rightly pursue the same course. You may have hypotheses and hypotheses. A man may say, if he likes, that the moon is made of green cheese; that is an hypothesis. But another man, who has devoted a great deal of time and attention to the subject and availed himself of the most powerful telescopes and the results of the observations of others, declares that in his opinion it is probably composed...
149 페이지 - But a race of dumb men, deprived of all communication with those who could speak, would be little indeed removed from the brutes. And the moral and intellectual difference between them and ourselves would be practically infinite, though the naturalist should not be able to find a single shadow of even specific structural difference.