Charles Darwin's Works: The variation of animals and plants under domestication. 2vD. Appleton, 1896 |
Términos y frases comunes
aboriginal animals appearance bankiva Barbs beak birds blue Blyth body bones Brent bud-variation buds Carriers cattle cervical vertebra character Cochins colour common crest crossed cultivated degree descended described distinct species dogs domestic breeds domestic pigeons domestic rabbits domestic races duck ears elongated English Carriers English Pouter fact fanciers Fantails feathers feet female feral flowers frontal bones fruit Gardener's Chron genus Hist horses Hort hybrids India Islands Jacobin kinds large lop-eared rabbits latter legs likewise livia lumbar vertebræ male mammæ modified namely natural nearly nectarine niata observed parent-form peach peculiar pigeons pigs plants plumage pollen Porto Santo Pouters produced remarkable resemble rock-pigeon Runts seed seedlings seen selection shape sheep Short-faced Tumbler skeletons skin skull specimens sternum stripes sub-breeds Sub-race sub-varieties tail tail-feathers Tegetmeier trees Turbits variable variation varieties vary vertebræ wattle whilst wild rabbit wild rock-pigeon wings Zoolog
Pasajes populares
Página 6 - It has been said that I speak of natural selection as an active power or Deity; but who objects to an author speaking of the attraction of gravity as ruling the movements of the planets?
Página 7 - I mean by Nature, only the aggregate action and product of many natural laws, and by laws the sequence of events as ascertained by us.
Página 3 - Bnt the initial variation on which man works, and without which he can do nothing, is caused by slight changes in the conditions of life, which must often have occurred under nature.
Página 91 - ... curved upwards. The lower jaw projects beyond the upper, and has a corresponding upward curvature.
Página 9 - In scientific investigations it is permitted to invent any hypothesis, and if it explains various large and independent classes of facts it rises to the rank of a well-grounded theory.
Página 4 - Man may select and preserve each successive variation, with the distinct intention of improving and altering a breed, in accordance with a preconceived idea...
Página 431 - Hence there can be no doubt that the quagga affected the character of the offspring subsequently begot by the black Arabian horse.
Página 3 - By CHARLES DARWIN, LL. D., FRS With Illustrations. Revised edition. 2 vols., 12mo. Cloth, $5.00. " We shall learn something of the laws of inheritance, of the effects of crossing different breeds, and on that sterility which often supervenes when organic beings are removed from their natural conditions ot life, and likewise when they are too closely interbred."— from the Introduction.
Página 100 - From this one lamb the otter or ancon semi-monstrous breed was raised ; as these sheep could not leap over the fences, it was thought that they would be valuable ; but they have been supplanted by merinos, and thus exterminated.
Página 63 - ... single, dun-coloured, more or less striped, primitive stock, to which our horses occasionally revert. THE Ass. FOUR species of Asses, besides three zebras, have been described by naturalists.