Darwin Tree 1837


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Charles Darwin's 1837 sketch, his first diagram of an evolutionary tree from his First Notebook on Transmutation of Species (1837).

Interpretation of handwriting: "I think case must be that one generation should have as many living as now. To do this and to have as many species in same genus (as is) requires extinction . Thus between A + B the immense gap of relation. C + B the finest gradation. B+D rather greater distinction. Thus genera would be formed. Bearing relation" (next page begins) "to ancient types with several extinct forms"
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Public domain
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Public domain

Værket er også offentlig ejendom i lande og områder, hvor ophavsrettens længde er ophavsmandens levetid plus 70 år eller derunder.


Dette værk er offentlig ejendom i Amerikas Forenede Stater (USA) fordi det blev udgivet (eller registreret hos U.S. Copyright Office) før 1 januar 1928.


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