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Hope Entomological Collections, Oxford University Museum of Natural History in repository 
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From:
Charles Robert Darwin
To:
Raphael Meldola
Date:
23 Jan [1872]
Source of text:
Oxford University Museum of Natural History (Hope Entomological Collections 1350: Hope/Westwood Archive, Darwin folder)
Summary:

Discusses the problems of mimicry as related to natural selection; the general variability of colour as a character; and the conditions necessary for natural selection to fix firmly a character.

Encloses a Fritz Müller letter speculating that organisms respond to certain colours because of the prevalence of those colours in their environment.

Contributor:
Darwin Correspondence Project