| 1868 - 522 páginas
...preserve, and accumulate the variations given him by the hand of Nature in any way he thinks desirable, improving and altering a breed in accordance with...variations, often so slight as to be imperceptible to an uneducated eye, effect wonderful results. It can also be clearly shown that man, -without any... | |
| John William Carleton - 1868 - 520 páginas
...preserve, and accumulate the variations given him by the hand of Nature in any way ho thinks desirable, improving and altering a breed in accordance with a preconceived idea ; and by thus addmg up, variations, often so slight as to be impercepiible to an uneducated eye, effect wonderful... | |
| 518 páginas
...preserve, and accumulate the variations given him by the hand of Nature in any way he thinks desirable, improving and altering a breed in accordance with...variations, often so slight as to be imperceptible to an uneducated eye, effect wonderful results. It can also be clearly shown that man, without any... | |
| Charles Darwin - 1884 - 396 páginas
...unconsciously and unintentionally. Man may select and preserve each successive variation, with the distinct intention of improving and altering a breed,...breed, by preserving in each successive generation the individuals which he prizes most, and by destroying the worthless individuals, slowly, though surely,... | |
| Charles Darwin - 1887 - 504 páginas
...unconsciously and unintentionally. Man may select and preserve each successive variation, with the distinct intention of improving and altering a breed,...wonderful changes and improvements. It can, also, bo clearly shown that man, without any intention or thought of improving the breed, by preserving in... | |
| Jane Hancox Newell - 1889 - 232 páginas
...with a preconceived idea ; and by thus adding up variations, often so slight as to be imperceptible to an uneducated eye, he has effected wonderful changes...breed, by preserving in each successive generation the individuals which he prizes most, and by destroying the worthless individuals, slowly, though surely,... | |
| Jane Hancox Newell - 1889 - 232 páginas
...or unconsciously and unintentionally. Man may select and preserve each successive variation with the distinct intention of improving and altering a breed,...variations, often so slight as to be imperceptible to an uneducated eye, he has effected wonderful changes and improvements. It can 1 " The Variation... | |
| Charles Darwin - 1892 - 518 páginas
...methodically and intentionally, or unconsciously and unintentionally. Man may select and preserve ear:h successive variation, with tho distinct intention...slight as to be imperceptible by an uneducated eye, ho has efl'ected wonderful changes and improvements. It can, also, be clearly shown that man, without... | |
| United States. Bureau of Animal Industry - 1892 - 1192 páginas
...or unconNMonaly and unintentionally. Man may select and preserve each successive variation, with the distinct intention of improving and altering a breed,...by thus adding up variations, often so slight as to lw imperceptible by an uneducated eye, he has effected wonderful changes and imI rnvementa. It can,... | |
| Jane Hancox Newell - 1895 - 232 páginas
...with a preconceived idea ; and by thus adding up variations, often so slight as to be imperceptible to an uneducated eye, he has effected wonderful changes and improvements. It can 1 " The Variation of Animals and Plants under Domestication." By Charles Darwin. New York. D. Applcton... | |
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