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" I HAVE hitherto sometimes spoken as if the variations — so common and multiform in organic beings under domestication, and in a lesser degree in those in a state of nature — had been due to chance. This, of course, is a wholly incorrect expression,... "
Nature - Página 247
editado por - 1890
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The Edinburgh Review: Or Critical Journal, Volumen184

1896 - 588 páginas
...over others.' * In accepting this conclusion, it must be borne in mind that Darwin felt constrained ' to acknowledge plainly our ignorance of ' the cause of each particular variation.' f The research he started carried us behind and beyond the evidence for historic variation. We are...
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The Shipley Collection of Scientific Papers, Volumen27

1891 - 460 páginas
...under nature, were due to chance. This, of course, is a wholly incorrect expression, but it serves to acknowledge plainly our ignorance of the cause of each particular variation."» I have already quoted Lankester upon this principle and refer below to a passage in which he reiterates...
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Littell's Living Age, Volumen95

1867 - 854 páginas
...meaning of the law." •• This (chance) of course is a wholly incorrect expression, but it serves to acknowledge plainly our Ignorance of the cause of each particular variation." '• Why • • . . this or that part should vary more or jess, ire are profoundly ignorant ; nevertheless,...
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On the Origin of Species by Means of Natural Selection; Or, The Preservation ...

Charles Darwin - 1861 - 470 páginas
...nature — had been due to chance. This, of course, is a wholly incorrect expression, but it serves to acknowledge plainly our ignorance of the cause of each particular variation. Some authors believe it to be as much the function of the reproductive system to produce individual...
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The Principles of Biology, Volumen1

Herbert Spencer - 1864 - 510 páginas
...of nature—had been due to chance. This, of course, is a wholly incorrect expression, but it serves to acknowledge plainly our ignorance of the cause of each particular variation." Not only, however, do I hold, in common with Mr Darwin, that there must be some cause for these apparently-spontaneous...
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The Principles of Biology, Volumen1

Herbert Spencer - 1864 - 506 páginas
...nature — had been due to chance. This, of course, is a wholly incorrect expression, but it serves to acknowledge plainly our ignorance of the cause of each particular variation." Not only, however, do I hold, in common with Mr Darwin, that there must be some cause for these apparently-spontaneous...
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On the Origin of Species by Means of Natural Selection: Or, The Preservation ...

Charles Darwin - 1864 - 472 páginas
...nature — had been due to chance. This, of course, is a wholly incorrect expression, but it serves to acknowledge plainly our ignorance of the cause of each particular variation. Some authors believe it to be as much the function of the reproductive system to produce individual...
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The British Controversialist and Literary Magazine, Volumen1

1865 - 496 páginas
...of the laws of variation is profound,' and that in speaking of them as due to chance, he means only 'to acknowledge plainly our ignorance of the cause of each particular variation.' Again he says, 'I believe in no law of necessary development.' His theory seems to be far better than...
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The Reign of Law

George Douglas Campbell Duke of Argyll - 1867 - 490 páginas
...laws of variation is profound;" and says, that in speaking of them as due to chance, he means only " to acknowledge plainly our ignorance of the cause of each particular variation."* Again he says — " I believe in no law of necessary development.'^ This distinction between Mr Darwin's...
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The Contemporary Review, Volumen6

1867 - 548 páginas
...the meaning of the law." " This (chance) of course is a wholly incorrect expression, but it serves to acknowledge plainly our ignorance of the cause of each particular variation." " Why .... this or that part should vary more or leas, we are profoundly ignorant ; nevertheless, we...
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