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DCP-LETT-7639

From:
Charles Robert Darwin
To:
William James Erasmus (Erasmus) Wilson
Date:
29 Mar [1871]
Source of text:
DAR 96: 99
Summary:

Wonders whether correspondent might possibly know of any cases in which intense concentration of the mind on one portion of the skin produces dilation of the capillary vessels and hence reddening of the area.

Contributor:
Darwin Correspondence Project
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DCP-LETT-7640

From:
Charles Robert Darwin
To:
Guillaume Benjamin Amand Duchenne
Date:
29 Mar [1871]
Source of text:
DAR 96: 109–10
Summary:

Thanks GBAD for permission to use his photographs [see 7623] and for the information on the expression of astonishment in monkeys.

Contributor:
Darwin Correspondence Project
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