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 xv
... reason , slowly and with due caution to have made his way synthetically from fact to fact onwards ; while with me it was by a general glance at the scheme of Nature that I estimated this select production of species as an à priori ...
... reason , slowly and with due caution to have made his way synthetically from fact to fact onwards ; while with me it was by a general glance at the scheme of Nature that I estimated this select production of species as an à priori ...
Page xvii
... reason for believing that specific characters " sont fixes , pour chaque espèce , tant qu'elle se perpétue au milieu des mêmes circonstances : ils se modifient , si les circonstances am- biantes viennent à changer . " " En résumé , l ...
... reason for believing that specific characters " sont fixes , pour chaque espèce , tant qu'elle se perpétue au milieu des mêmes circonstances : ils se modifient , si les circonstances am- biantes viennent à changer . " " En résumé , l ...
Page 8
... reasons make me believe in this ; but the chief one is the remarkable effect which confine- ment or cultivation has on the function of the repro- ductive system : this system appearing to be far more susceptible than any other part of ...
... reasons make me believe in this ; but the chief one is the remarkable effect which confine- ment or cultivation has on the function of the repro- ductive system : this system appearing to be far more susceptible than any other part of ...
Page 14
... reason why a peculiarity should appear at any particular age , yet that it does tend to appear in the offspring at the same period at which it first appeared in the parent . I believe this rule to be of the highest importance in ...
... reason why a peculiarity should appear at any particular age , yet that it does tend to appear in the offspring at the same period at which it first appeared in the parent . I believe this rule to be of the highest importance in ...
Page 19
... reasons which I cannot here give , I am with much doubt inclined to believe , in opposition to several authors , that all the races have descended from one wild stock . Mr. Blyth , whose opinion , from his large and varied stores of ...
... reasons which I cannot here give , I am with much doubt inclined to believe , in opposition to several authors , that all the races have descended from one wild stock . Mr. Blyth , whose opinion , from his large and varied stores of ...
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Common terms and phrases
accumulated adapted affinities allied species America amount analogous ancient animals appear Asa Gray become bees believe birds breeds cause cells characters cirripedes climate closely allied colour continuous crossed crustaceans degree difficulty distinct species divergence domestic doubt embryo Europe existing exterminated extinct extremely facts favourable 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 individuals inhabitants inherited insects instance instincts intercrossing intermediate land larvæ laws less living male mammals manner Marsupials migration modification modified descendants mongrels natural selection naturalists nearly nest occasionally offspring organisation origin of species perfect pigeons plants pollen present principle probably produced progenitor racter ranked reciprocal crosses remarked resemble rudimentary organs seeds Silurian slight South America sterility structure struggle successive supposed tend theory tion variability variations varieties vary whole widely