 Our ignorance of the laws of variation is profound. Not in one case out of a hundred can we pretend to assign any reason why this or that part differs, more or less, from the same part in the parents.  The American Naturalist - Page 811909Full view - About this book
 | Lewis Thornton - Philosophy and religion - 1890 - 396 pages
...relations of the inhabitants of the world at the present time, and still more so during past ages." " Our ignorance of the laws of variation is profound. Not in one case out of a hundred can we pretend to assign any reason why this or that part has varied." " Long... | |
 | Thomas Henry Huxley - Evolution - 1894 - 504 pages
...useful, or hurtful, or indifferent." On the contrary, Mr. Darwin writes (Summary of Chap. V.) :— " Our ignorance of the laws of variation is profound. Not in one case out of a hundred can we pretend to assign any reason w!iy this or that part varies more or less... | |
 | Frederick Converse Beach - Encyclopedias and dictionaries - 1904 - 1358 pages
...variation it must be confessed that we are to-day not much in advance of Charles Darwin, who said : "Our ignorance of the laws of variation is profound. Not in one case out of a hundred can we pretend to assign any reason why this or that part has varied." Consult... | |
 | David Starr Jordan, Vernon Lyman Kellogg - Evolution - 1907 - 526 pages
...• • wL Tarsus. .VJ ' Middle Toe. • ••• f ••• Hind Toe. Bill, Length. •••*• "Our ignorance of the laws of variation is profound. Not in one case out of a hundred can we pretend to assign any reason why this or that part has varied. But whenever... | |
 | Rev. C. W. Formby - Evolution, mental - 1907 - 310 pages
...committed murder ? Darwin himself was evidently dissatisfied with the theory, for he writes : — " Our ignorance of the laws of variation is profound. Not in one case out of a hundred can we pretend to assign any reason why this or that part has varied." l Referring... | |
 | New York Academy of Sciences - Science - 1908 - 650 pages
...was with variation, however produced, which was the necessary basis of the whole evolutionaryprocess. He admitted, however, that the cause of variation...ignorance of the laws of variation is profound. Not in one case out of a hundred can we pretend to assign any reason why this or that part has varied." * In another... | |
 | John Arthur Thomson - Biology - 1908 - 272 pages
...the causes of variations and mutations we know very little. We must still repeat Darwin's words, " Our ignorance of the laws of variation is profound. Not in one case out of a hundred can we pretend to assign any reason why this or that part has varied." It is... | |
 | Biology - 1909 - 784 pages
...selection, he contended, at other times, with equal vigor, that his main interest was with variation, however produced, which was the necessary basis of...deep mystery. Darwin said of it: Our ignorance of tlie laws of variation is profound. Not in one case out of a hundred can we pretend to assign any reason... | |
 | Charles Darwin - Evolution - 1909 - 584 pages
...lived, but had been created in stone so as to mock the shells living on the sea-shore. Summary. — Our ignorance of the laws of variation is profound. Not in one case out of a hundred can we pretend to assign any reason why this or that part has varied. But whenever... | |
 | John Arthur Thomson - Evolution - 1910 - 410 pages
...answer until our knowledge of their nature has greatly increased. We must still confess, with Darwin : " Our ignorance of the laws of variation is profound. Not in one case out of a hundred can we pretend to assign any reason why this or that part has varied." And again... | |
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