From:
James Ross
To:
Charles Robert Darwin
Date:
Sept 1874
Source of text:
DAR 176: 217
Summary:
Sends his book [On protoplasm (1874)], which defends CD’s theory.
Suggests why the lips are closed and the teeth clenched in the expression of determination: it originated as a means of protecting jaw-bone and teeth against a strong blow.
Contributor:
Darwin Correspondence Project