From:
Frans Cornelis (Franciscus Cornelius) Donders
To:
Charles Robert Darwin
Date:
28 May 1870
Source of text:
DAR 162: 226
Summary:
A detailed description of the physiological and anatomical processes related to the prolonged involuntary contraction of the orbicular muscles and the secretion of tears (as in retching, violent coughing, or laughing). [See Expression, p. 160.].
Contributor:
Darwin Correspondence Project