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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 | (1) |
Author
| Köppen, F. T. | (1) |
