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DCP-LETT-5966

From:
Alfred Russel Wallace
To:
Charles Robert Darwin
Date:
1 Mar 1868
Source of text:
DAR 106: B49–50, B53–5
Summary:

Offers enclosure demonstrating that natural selection could produce sterility of hybrids.

More on Pangenesis and the inadequacy of H. Spencer’s approach.

Contributor:
Darwin Correspondence Project
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DCP-LETT-5966A

From:
Charles Robert Darwin
To:
Henry Doubleday
Date:
1 Mar [1868]
Source of text:
George W. Platzman (private collection)
Summary:

Has been interested in copy of HD’s letter to H. T. Stainton on numerical proportions of the sexes of insects. Do they vary during different years?

Does he have opinions about the courtships of butterflies?

Will send a copy of his paper on Primula when it is published. [See 5997.]

Contributor:
Darwin Correspondence Project

Herschel6639

From:
Sir John Herschel
To:
Elizabeth Colling
Date:
[1 March 1868]
Source of text:
RS:HS 24.213
Summary:

Comments on the death of a number of friends, his own poor health, and how he spent the winter working through his double-star observations.

Contributor:
John Herschel Project
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