From:
Joseph Warner Clark
To:
Charles Robert Darwin
Date:
25 June 1875
Source of text:
DAR 161: 154
Summary:
Observations of fear in animals marked by dilation of pupils.
Contributor:
Darwin Correspondence Project
Observations of fear in animals marked by dilation of pupils.
Examples of pupillary dilation.
An example of inheritance confined to one sex.
Thanks for information about effect of fear on the iris.