From:
Hugh Browne
To:
Charles Robert Darwin
Date:
17 Apr [1871]
Source of text:
DAR 160: 331
Summary:
Raises two points on CD’s view, in Descent [2: 229], on how aquatic birds acquire white plumage.
Also remarks on effect of will in certain human modifications,
on colour-blindness in his children,
and on ability to move his ears.
Contributor:
Darwin Correspondence Project
