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Darwin, C. R. in addressee 
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From:
Francis Darwin
To:
Charles Robert Darwin
Date:
[1875?]
Source of text:
DAR 274.1: 28
Summary:

Had two mornings working on Drosera but it was sluggish. Frog preparations are pretty good.

Contributor:
Darwin Correspondence Project
From:
Octavius March
To:
Charles Robert Darwin
Date:
[1875]
Source of text:
H. C. March 1883 , p. 23
Summary:

Wonders if it is possible that the couvade had its origin in an early habit of the male sex to take part in the nourishment of the offspring.

Contributor:
Darwin Correspondence Project