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To F. J. Cohn   1 January 1875

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Summary

Asks whether he might copy two of FJC’s drawings of Aldrovanda. He would like to have a proof of the plate for two woodcuts to be used in his forthcoming book [Insectivorous plants].

Author:  Charles Robert Darwin
Addressee:  Ferdinand Julius Cohn
Date:  1 Jan 1875
Classmark:  DAR 185: 97
Letter no:  DCP-LETT-9795A

From F. J. Cohn   9 January 1875

Summary

Thanks CD for his letter of 1 Jan 1875. Will send a paper on the genus Volvox ["Die Entwicklungsgeschichte der Gattung Volvox", Cohn Beitr. Biol. Pflanz. 1 (1875) Heft 3: 99–115].

Informs CD of his discoveries of the "house"-building capacity of Difflugia, one of the lowest forms of organism.

Sends CD his writing on Aldrovanda and Utricularia, which he is welcome to use in his forthcoming book [Insectivorous plants].

Has observed a Dionaea fertilised without insect aid.

Author:  Ferdinand Julius Cohn
Addressee:  Charles Robert Darwin
Date:  9 Jan 1875
Classmark:  DAR 161: 199
Letter no:  DCP-LETT-9810
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