From:
Charles Robert Darwin
To:
Carl Gottfried Semper
Date:
[after 6 Dec 1878]
Source of text:
DAR 202: 120v
Summary:
Gives CGS permission to use his letters in any way he thinks fit.
Discusses the direct effect of external conditions as an agent of change in organisms; has encountered many cases since the publication of Origin.
Contributor:
Darwin Correspondence Project
