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To F. T. Köppen   18 November 1874

Summary

Thanks FTK for telling him of Jahn’s work [see 9719], of which CD had not heard. It would have been of greatest use in writing Descent.

Author:  Charles Robert Darwin
Addressee:  Friedrich Theodor Köppen (Fedor Petrovich Keppen)
Date:  18 Nov 1874
Classmark:  Archive of the Russian Academy of Sciences, St Petersburg branch: SPBB ARAS (Fond 92. Register 1. Folder 112. P. 3, 3 r)
Letter no:  DCP-LETT-9722
Document type
letter (1)
Author
Darwin, C. R.disabled_by_default
Addressee
Correspondent
Darwin, C. R.disabled_by_default
Köppen, F. T.disabled_by_default