 I find in the domestic duck that the bones of the wing weigh less and the bones of the leg more, in proportion to the whole skeleton, than do the same bones in the wild duck; and this change may be safely attributed to the domestic duck flying much less,...  Queensland agricultural journal Volume 5 - Strana 251899 - Počet stránok 608Úplné zobrazenie - O tejto knihe
 | Nicholas Patrick Wiseman - 1860 - Počet stránok 594
...have been obliged to rely more on one sense than others do. In the domestic duck, Mr. Darwin found that " the bones of the wing weigh less, and the bones...proportion to the whole skeleton than do the same bones in the wild duck." And disuse has also its physical effect upon the frame. "Not a single domestic animal... | |
 | Robert Kemp Philp - 1860 - Počet stránok 360
...especially from no pleasure having been felt in the display of distinct breeds. 1148. In the domestic duck, the bones of the wing weigh less, and the bones of...proportion to the whole skeleton, than do the same bodies in the wild duck ; and I presume that this change may be safely attributed to the domestic duck... | |
 | Charles Darwin - 1861 - Počet stránok 470
...when transported from one climate to another. In animals it has a more marked effect ; for instance, I find in the domestic duck that the bones of the...proportion to the whole skeleton, than do the same bones in the wild duck ; and I presume that this change may be safely attributed to the domestic duck flying... | |
 | robert scott burn - 1861 - Počet stránok 738
...inheritance. Habit has also a decided influence, especially on animals; " for instance," says Mr Darwin, " I find in the domestic duck that the bones of the...proportion to the whole skeleton, than do the same bones in the wild-duck; and I presume that this change maybe safely attributed to the domestic duck flying... | |
 | 1861 - Počet stránok 562
...change of habit, under domestication, may influence the relative proportions of the bod}', eg, " 1 find in the domestic duck that the bones of the wing...more, in proportion to the whole skeleton, than do the bones of the wild duck ; and I presume that this change may be safely attributed to the domestic duck... | |
 | Stephen Lincoln Goodale - 1861 - Počet stránok 176
...an illustration of the effect of habit, Darwin* cites the domestic duck, of which he says, " I find that the bones of the wing weigh less, and the bones of the legmore, in proportion to the whole skeleton, than do the same bones in the wild duck ; and I presume... | |
 | Herbert Spencer - 1864 - Počet stránok 506
...modifications which eventuate in differences of species, nevertheless admits the effects of use and disuse. He says — " I find in the domestic duck that the bones...proportion to the whole skeleton, than do the same bones in the wild duck ; and I presume that this change may be safely attributed to the domestic duck flying... | |
 | Herbert Spencer - 1864 - Počet stránok 510
...modifications which eventuate in differences of species, nevertheless admits the effects of use and disuse. He says—" I find in the domestic duck that the bones...proportion to the whole skeleton, than do the same bones in the wild duck; and I presume that this change may be safely attributed to the domestic duck flying... | |
 | Charles Darwin - 1864 - Počet stránok 472
...when transported from one climate to another. In animals it has a more marked effect ; for instance, I find in the domestic duck that the bones of the...proportion to the whole skeleton, than do the same bones in the wild duck ; and I presume that this change may be safely attributed to the domestic duck flying... | |
 | Herbert Spencer - 1875 - Počet stránok 514
...modifications which eventuate in differences of species, nevertheless admits the effects of use and disuse. He says — " I find in the domestic duck that the bones • of the wing weigh less and the bones of tho leg more, in proportion to the whole skeleton, than do the same bones in the wild duck ; and I... | |
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