On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeThis is the 'second edition' of Darwin's Origin of Species. |
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Page 20
been produced by the crossing of a few aboriginal species; but by crossing we
can only get forms in some degree intermediate between their parents; and if we
account for our several domestic races by this process, we must admit the former
...
been produced by the crossing of a few aboriginal species; but by crossing we
can only get forms in some degree intermediate between their parents; and if we
account for our several domestic races by this process, we must admit the former
...
Page 29
Let us now briefly consider the steps by which domestic races have been
produced, either from one or from several allied species. Some little effect may,
perhaps, be attributed to the direct action of the external conditions of life, and
some little ...
Let us now briefly consider the steps by which domestic races have been
produced, either from one or from several allied species. Some little effect may,
perhaps, be attributed to the direct action of the external conditions of life, and
some little ...
Page 31
... that “he would produce any given feather in three years, but it would take him
six years to obtain head and beak.” In Saxony the importance of the principle of
selection in regard to merino sheep is so fully recognised, that men follow it as a
...
... that “he would produce any given feather in three years, but it would take him
six years to obtain head and beak.” In Saxony the importance of the principle of
selection in regard to merino sheep is so fully recognised, that men follow it as a
...
Page 32
... but its importance consists in the great effect produced by the accumulation in
one direction, during successive generations, of differences absolutely
inappreciable by an uneducated eye–differences which I for one have vainly
attempted to ...
... but its importance consists in the great effect produced by the accumulation in
one direction, during successive generations, of differences absolutely
inappreciable by an uneducated eye–differences which I for one have vainly
attempted to ...
Page 37
Ihave seen great surprise expressed in horticultural works at the wonderful skill of
gardeners, in having produced such splendid results from such poor materials;
but the art, I cannot doubt, has been simple, and, as far as the final result is ...
Ihave seen great surprise expressed in horticultural works at the wonderful skill of
gardeners, in having produced such splendid results from such poor materials;
but the art, I cannot doubt, has been simple, and, as far as the final result is ...
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action adapted allied America amount ancient animals appear become believe birds breeds cause chapter characters climate closely common compared considered continuous crossed descended developed difficulty distinct domestic doubt Edition effects existing extinct extremely facts families favourable fertility flowers follow formations forms genera genus geological give given groups habits hand Hence History hybrids important increase individuals inhabitants inherited insects instance instincts intermediate islands kind land laws less living look male manner means modification namely natural selection naturalists nearly never observed occur organic origin parent perfect period plants points Post 8vo present principle probably produced range ranked reason remarked Second seeds seems seen separated single slight sometimes species sterility structure struggle successive supposed tend theory tion variability variations varieties vary Vols whole widely Woodcuts