Acknowledges his election as a Corresponding Member of the Imperial Academy of Sciences, St Petersburg.
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Acknowledges his election as a Corresponding Member of the Imperial Academy of Sciences, St Petersburg.
Thanks for FTK’s locust paper ["Die geographische Verbreitung der Wanderheuschrecke", Petermann’s Geogr. Mittheil. (1871)].
VOK’s paper ["Osteology of Hyopotamidae", Proc. R. Soc. Lond. 21 (1872–3): 147–65] appears a very valuable one.
Discusses work of VOK’s brother [Alexander] on Sagitta and the ascidians.
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.
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.