File:Darwin Tree 1837.png

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Description

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"
Date
Source Page 36 of Notebook B: [Transmutation of species (1837-1838)]. 'commenced. . . July 1837'; from Darwin Online
Author
Charles Darwin  (1809–1882)  wikidata:Q1035 s:en:Author:Charles Robert Darwin q:en:Charles Darwin
 
Charles Darwin
Alternative names
Charles Robert Darwin
Description British naturalist and author
Date of birth/death 12 February 1809 Edit this at Wikidata 19 April 1882 Edit this at Wikidata
Location of birth/death The Mount Down House Edit this at Wikidata
Authority file
creator QS:P170,Q1035
Permission
(Reusing this file)
Public domain

This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 70 years or fewer.

This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.

This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.
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