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DCP-LETT-6323

From:
Charles Robert Darwin
To:
Jean Louis Rodolphe (Louis) Agassiz
Date:
19 Aug 1868
Source of text:
Houghton Library, Harvard University (MS Am 1419: 278)
Summary:

Thanks LA for information on sexual differences in the coloration of Amazonian fish. CD was anxious to know how the sexes differed because they are unusual in that the male has the largest share in looking after ova and young.

Contributor:
Darwin Correspondence Project

Herschel7215

From:
Augustus De Morgan
To:
Sir John Herschel
Date:
[19 August 1868]
Source of text:
RS:HS 6.403
Summary:

Reasons why the sun has been so hot recently. Thanks for the paper on the scale. Comments on this. Sends a mathematical problem.

Contributor:
John Herschel Project

DCP-LETT-6325

From:
William Sweetland Dallas
To:
Charles Robert Darwin
Date:
19 Aug 1868
Source of text:
DAR 162: 22
Summary:

The material [from F. Müller] makes the translation more like a new edition.

German entomologists are becoming Darwinists.

Contributor:
Darwin Correspondence Project
Text Online

WCP1903

From:
Charles Robert Darwin
To:
Alfred Russel Wallace
Date:
19 August [1868]
Source of text:
  • British Library, The: BL Add. 46434 ff. 143-146
  • Marchant, J. (Ed.). (1916). In: Alfred Russel Wallace; Letters and Reminiscences. Vol. 1. London & New York: Cassell & Co. [pp. 219-220]
Summary:

No summary available.

Contributor:
Alfred Russel Wallace Correspondence Project

DCP-LETT-6324

From:
Charles Robert Darwin
To:
Joseph Dalton Hooker
Date:
19 Aug 1868
Source of text:
Lund University Library Special Collections (Sven Nilsson papers)
Summary:

Asks JDH to obtain from Sven Nilsson information on whether, in reindeer species in which both sexes are horned, the horns are first developed earlier or later than in species in which males alone have horns.

Contributor:
Darwin Correspondence Project

DCP-LETT-6322

From:
Charles Robert Darwin
To:
Alfred Russel Wallace
Date:
19 Aug [1868]
Source of text:
The British Library (Add MS 46434: 143–6)
Summary:

The problem of dimorphic plants and their fertility.

Contributor:
Darwin Correspondence Project
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