On the Origin of Species: Or, The Causes of the Phenomena of Organic Nature, a Course of Six Lectures to Working MenD. Appleton, 1881 - 150페이지 |
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animalcules animals apples asexual Atavism beak birds body bones called carbonic acid causes character Cloth common Compiled and abstracted conclusion condition of organic conditions of existence constantly course crustacean Darwin's hypothesis David Duncan deposited developed diagram domesticated pigeons earth endeavour enormous ERNST HAECKEL evidence experiments extinct fact field mice fingers and five forms gun-cotton hard and green Horse Illustrations infusion inorganic world kind Lake of Killarney larvæ layer lecture legs living male means modification muscles natural selection naturalists notice offspring organic matter organic nature Origin of Species particles peculiarities perfectly perpetuation phenomena of organic physiological pigeons Porpoise Pouter present primitive stock produce question races record reproduce result Rock Pigeon rocks seeds selective breeding sheep skeleton sort spontaneous structure substance suppose surface tendency tion variation varieties vary vegetable whole
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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.
59 페이지 - ... and in North America. In short, I find it to be the universal experience of mankind wherever attention has been directed to the subject.' Whereupon your friend, unless he is a very unreasonable man, agrees with you, and is convinced that you are quite right in the conclusion you have drawn. He believes, although, perhaps, he does not know he believes it, that the more extensive verifications...
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...
149 페이지 - ... it originates, or of the supply of blood to that part, or of one of the muscles to which it is distributed, might render all of us dumb. 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.
65 페이지 - Do not allow yourselves to be misled by the common notion that an hypothesis is untrustworthy simply because it is an hypothesis. It is often urged in respect to some scientific conclusion that, after all, it is only an hypothesis.
60 페이지 - In scientific inquiry it becomes a matter of duty to expose a supposed law to every possible kind of verification and to take care, moreover, that this is done intentionally and not left to a mere accident, as in the case of the apples. And in science, as in common life, our confidence in a law is in exact proportion to the absence of variation in the result of our experimental verifications.
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...