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From William Thierry Preyer [before 17 February 1870]
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.
| Author: | William Thierry (William) Preyer |
| Addressee: | Charles Robert Darwin |
| Date: | [before 17 Feb 1870] |
| Classmark: | DAR 261.11: 21 (EH 88206073) |
| Letter no: | DCP-LETT-7110 |
From W. T. Preyer 9 May 1870
Summary
Sends his "Charles Darwin, eine biographische Skizze" [Das Ausland 2 Apr 1870].
| Author: | William Thierry (William) Preyer |
| Addressee: | Charles Robert Darwin |
| Date: | 9 May 1870 |
| Classmark: | DAR 174: 68 |
| Letter no: | DCP-LETT-7181 |
