Fitxategi:Darwin tree.png

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Deskribapena

English: Charles Darwin's 1837 sketch, his first diagram of an evolutionary tree from his First Notebook on Transmutation of Species (1837) on view at the Museum of Natural History in Manhattan.

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". Text in Darwin's format:

36
(text)
I think 
(tree graph) 
B
D C 
1 A
(text on the side)
Case must be that one
generation then should be
as many living as now.
To do this & to have many species in
same genus (as is) requires extinction.
(text below tree graph)
Thus between A & B immense
gap of relation. C & B the 
finest gradation, B & D
rather greater distinction.
Thus genera would be
formed. — bearing relation

(The text continues outside the image:)(page 37) to ancient types. — with several extinct forms for if each species an ancient (1) is capable of making 13 recent forms, twelve of the contemporarys must have left no offspring at all, so as to keep number of species constant. — With respect to extinction we can easy see that variety of ostrich, Petise may not be well adapted, and thus perish out, or on other hand like Orpheus being favourable (page 38) many might be produced. — This requires principle that the permanent varieties produced by inter confined breeding & changing circumstances are continued & produced according to the adaptation of such circumstances, & therefore that death of species is a consequence (contrary to what would appear from America). Source of this text: User fileunderwater at https://biology.stackexchange.com/questions/46481/darwins-first-sketch-of-a-phylogenetic-tree , consulted on 26 April 2021.

Data

1837

Jatorria

http://www.english.uga.edu/nhilton/4890/darwin/DarwinTree.html

Egilea



Bestelako izenak	Charles Robert Darwin
Deskribapena	naturalist eta egile GB
Jaiotza/heriotza data	1809ko otsailaren 12a	1882ko apirilaren 19a
Jaiotza/heriotza lekua	The Mount	Down House
Autoritateen kontrol	: Q1035 VIAF: 27063124 ISNI: 0000000121251077 ULAN: 500228559 Open Library: OL35839A DBNL: darw001 WorldCat

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Lan hau jabetza publikoan dago bai bere jatorrizko herrialdean, bai egile eskubideak egilea hil eta 70 urtera edo gutxiagora iraungitzen diren gainerako herrialdeetan.

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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	Data/Ordua	Iruditxoa	Neurriak	Erabiltzailea	Iruzkina
oraingoa	09:02, 18 abuztua 2011		695 × 1.181 (15 KB)	Trockennasenaffe	optimized with OptiPNG
	12:20, 29 martxoa 2007		695 × 1.181 (52 KB)	Jrockley	{{Information \|Description=Charles Darwin's 1837 sketch, his first diagram of an evolutionary tree from his First Notebook on Transmutation of Species (1837) on view at the the Museum of Natural History in Manhattan. \|Source=http://www.english.uga.edu/nhi