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To F. T. Köppen 28 April [1871]
Summary
Thanks for FTK’s locust paper ["Die geographische Verbreitung der Wanderheuschrecke", Petermann’s Geogr. Mittheil. (1871)].
| Author: | Charles Robert Darwin |
| Addressee: | Friedrich Theodor Köppen (Fedor Petrovich Keppen) |
| Date: | 28 Apr [1871] |
| Classmark: | Archive of the Russian Academy of Sciences, St Petersburg branch: SPBB ARAS (Fond 92. Register 1. Folder 112. P. 1, 1 r) |
| Letter no: | DCP-LETT-7723 |
From F. T. Köppen 25 April 1871
Summary
Sends his paper on locusts ["Die geographische Verbreitung der Wanderheuschrecke", Petermann’s Geogr. Mittheil. (1871)]. The effect of the growth of forest land on their increase; meteorological and climatic effects.
Also observations made on increase in mice as a result of increase of locusts, on whose eggs they fed, and of increase of weasels that fed on mice.
| Author: | Friedrich Theodor Köppen (Fedor Petrovich Keppen) |
| Addressee: | Charles Robert Darwin |
| Date: | 25 Apr 1871 |
| Classmark: | DAR 46.1: 102 |
| Letter no: | DCP-LETT-7716 |
Document type
| letter | (2) |
Author
| Darwin, C. R. | (1) |
| Köppen, F. T. | (1) |
Addressee
| Darwin, C. R. | (1) |
| Köppen, F. T. | (1) |
