Thanks for FTK’s locust paper ["Die geographische Verbreitung der Wanderheuschrecke", Petermann’s Geogr. Mittheil. (1871)].
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The Charles Darwin Collection
The Darwin Correspondence Project is publishing letters written by and to the naturalist Charles Darwin (1809–1882). Complete transcripts of letters are being made available through the Project’s website (www.darwinproject.ac.uk) after publication in the ongoing print edition of The Correspondence of Charles Darwin (Cambridge University Press 1985–). Metadata and summaries of all known letters (c. 15,000) appear in Ɛpsilon, and the full texts of available letters can also be searched, with links to the full texts.
Thanks for FTK’s locust paper ["Die geographische Verbreitung der Wanderheuschrecke", Petermann’s Geogr. Mittheil. (1871)].
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.
Calls CD’s attention to a book that deals with subjects related to both Descent and Expression: Ferdinand Jahn, Die abnormen Zustände des menschlichen Lebens als Nachbildungen und Wiederholungen normaler Zustände des Thierlebens [1842].