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From N. A. Severtsov   25 September [1875]

Summary

Sends CD the 2d part of his travels into the Tien-shan mountains [Erforschung des Thian-Schan Gebirgs-Systems (1875)].

Has written a paper on the ranges and systematics of wild sheep and on modifications probably resulting from competition with domestic sheep, which he wishes to translate into English and would like to see appended to Variation.

Discusses sexual selection in thrushes; it apparently modifies one species into another.

Author:  Nikolai Alekseevich Severtsov
Addressee:  Charles Robert Darwin
Date:  25 Sept [1875]
Classmark:  DAR 177: 143
Letter no:  DCP-LETT-10172
Document type
Author
Addressee
Correspondent
Darwin, C. R.disabled_by_default
Severtsov, N. A.disabled_by_default
Date
1875 (1)