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From:
Darwin, Emma
To:
Litchfield, H. E.
Date:
[25 September 1875]
Source of text:
DAR 219.9: 126
Summary:

No summary available.

Contributor:
Darwin Family Letters
From:
Charles Robert Darwin
To:
Francis Galton
Date:
25 Sept 1875
Source of text:
UCL Library Services, Special Collections (GALTON/2/4/3/13/5)
Summary:

Thanks FG for issues of Revue [Scientifique vol. 7, containing lectures by Claude Bernard].

Ogle says twins [with crooked fingers] are his sisters.

Recommends book by M. A. Puvis [De la dégénération des variétés de végétaux (1837)].

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
William Ogle
Date:
25 Sept 1875
Source of text:
DAR 261.5: 15 (EH 88205913)
Summary:

From Galton’s "twin study" he suspects that some progenitor of WO’s had the peculiarities in question.

Has collected cases of signs of assent for a revised edition of Expression.

Suggests bees visit same species because they know how far to insert proboscis and thus save time.

Contributor:
Darwin Correspondence Project
From:
Nikolai Alekseevich Severtsov
To:
Charles Robert Darwin
Date:
25 Sept [1875]
Source of text:
DAR 177: 143
Summary:

Sends CD the 2d part of his travels into the Tien-shan mountains [Erforschung des Thian-Schan Gebirgs-Systems (1875)].

Has written a paper on the ranges and systematics of wild sheep and on modifications probably resulting from competition with domestic sheep, which he wishes to translate into English and would like to see appended to Variation.

Discusses sexual selection in thrushes; it apparently modifies one species into another.

Contributor:
Darwin Correspondence Project