Search: Charles Darwin in collection 
1860-1869::1868::03::01 in date 
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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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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