From:
Chauncey Wright
To:
Charles Robert Darwin
Date:
3 Sept 1874
Source of text:
DAR 181: 172, 173 f. 6
Summary:
Writes at length on the origins and meanings of particular head movements as used to express assent or disagreement, especially the sideways movements of the head as an expression of consideration or contemplation.
Also discusses space and colour perception.
Contributor:
Darwin Correspondence Project