Search: letter in document-type 
1870-1879 in date 
Darwin, C. R. in correspondent 
Tyler, D. F. in correspondent 
Sorted by:

Showing 11 of 1 item

From:
Daniel F Tyler
To:
Charles Robert Darwin
Date:
15 Aug 1872
Source of text:
DAR 88: 181–2
Summary:

Parallel quotations from Benjamin Franklin and Descent about absorption of heat by different colours; applies to winter and summer plumage of birds.

Reasoning power in dogs.

Contributor:
Darwin Correspondence Project
thumbnail