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Darwin, C. R. in correspondent 
Preyer, William in correspondent 
1870-1879::1870 in date 
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DCP-LETT-7110

From:
William Thierry (William) Preyer
To:
Charles Robert Darwin
Date:
[before 17 Feb 1870]
Source of text:
DAR 261.11: 21 (EH 88206073)
Summary:

Notes the differences in haemoglobin between species; this proves, to WP, that natural selection does not act only on morphological development.

Remarks on the differences and similarities in the effects of prussic acid on different groups of animals.

Questions CD on his early education and influences.

Contributor:
Darwin Correspondence Project

DCP-LETT-7112

From:
Charles Robert Darwin
To:
William Thierry (William) Preyer
Date:
17 Feb [1870]
Source of text:
Ralph Colp Jr (private collection)
Summary:

Comments on effects of prussic acid on different individuals of the same species and other physiological research by WP.

Provides information about his studies in Edinburgh and Cambridge and qualifications he had for Beagle voyage. Describes influence of R. E. Grant and J. S. Henslow.

Contributor:
Darwin Correspondence Project

DCP-LETT-7181

From:
William Thierry (William) Preyer
To:
Charles Robert Darwin
Date:
9 May 1870
Source of text:
DAR 174: 68
Summary:

Sends his "Charles Darwin, eine biographische Skizze" [Das Ausland 2 Apr 1870].

Contributor:
Darwin Correspondence Project

DCP-LETT-7190

From:
Charles Robert Darwin
To:
William Thierry (William) Preyer
Date:
15 May 1870
Source of text:
DAR 147: 256–8
Summary:

Comments on WP’s biographical article on CD. Asks him to thank O. F. Peschel for his present of the publication [Das Ausland 2 Apr 1870].

Contributor:
Darwin Correspondence Project
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