On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for Life |
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Page 30
... feathers are kept expanded , and are carried so erect , that in good I ; birds the head and tail touch : the oil - gland is quite 3 aborted . Several other less distinct breeds might be specified 30 VARIATION UNDER DOMESTICATION.
... feathers are kept expanded , and are carried so erect , that in good I ; birds the head and tail touch : the oil - gland is quite 3 aborted . Several other less distinct breeds might be specified 30 VARIATION UNDER DOMESTICATION.
Page 31
... less distinct breeds might be specified . In the skeletons of the several breeds , the develop- ment of the bones of the face in length and breadth and curvature differs enormously . The shape , as well as the breadth and length of the ...
... less distinct breeds might be specified . In the skeletons of the several breeds , the develop- ment of the bones of the face in length and breadth and curvature differs enormously . The shape , as well as the breadth and length of the ...
Page 34
... less and less , as in each succeeding generation there will be less of the foreign blood ; but when there has been no cross with a distinct breed , and there is a tendency in both parents to revert to a character which has been lost ...
... less and less , as in each succeeding generation there will be less of the foreign blood ; but when there has been no cross with a distinct breed , and there is a tendency in both parents to revert to a character which has been lost ...
Page 35
... given for pigeons ; nay , they are come to this pass , that they can reckon up their pedigree and race . " Pigeons were much valued by Akber Khan in India , about the 66 66 " " year 1600 ; never less than 20,000 DOMESTIC PIGEONS 35.
... given for pigeons ; nay , they are come to this pass , that they can reckon up their pedigree and race . " Pigeons were much valued by Akber Khan in India , about the 66 66 " " year 1600 ; never less than 20,000 DOMESTIC PIGEONS 35.
Page 36
... less than 20,000 pigeons were taken with the court . " The monarchs of Iran and Turan sent him some very rare birds ; and , continues the courtly historian , His Majesty by crossing the breeds , which method was never practised before ...
... less than 20,000 pigeons were taken with the court . " The monarchs of Iran and Turan sent him some very rare birds ; and , continues the courtly historian , His Majesty by crossing the breeds , which method was never practised before ...
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Common terms and phrases
accumulated adapted affinities allied species America analogous ancient animals appear archipelago become bees believe birds breeds cause cells characters cirripedes climate closely allied colour continuous crossed crustaceans degree difficulty distinct species divergence domestic doubt embryo endemic existing exterminated extinct extremely facts favourable fertilised fertility flowers formations forms fossil Gärtner genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hybrids hybrids produced important increase individuals inhabitants inherited insects instance instincts intercrossing intermediate larvæ laws less living males mammals manner migration modification modified descendants natural selection naturalists nearly nest occasionally offspring organic organisation origin of species perfect pigeons plants pollen present principle probably produced progenitor ranked reciprocal crosses remarked resemble rock-pigeon rudimentary seeds sexual sexual selection Silurian slight sometimes South America sterility structure struggle successive supposed swimbladder tend theory variability variations varieties vary whole widely