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Darwin Correspondence Project

To Eduard Koch   20 December [1873]1

Down, | Beckenham, Kent.

Dec. 20th

Dear Sir

I am very much obliged for the copy of the beautifully got Translation of my Variation under Domestication, received a few days ago; & for your present of the admirable work on the microscopical structure of rocks.—2

Dear Sir | Yours very faithfully | Ch. Darwin


The year is established by the address and by publication date of the second German edition of Variation (see n. 2, below). The printed stationery is of a sort that CD used between January 1872 and November 1874.
CD refers to the second German edition of Variation (Carus trans. 1873) and to the first volume of Harry Rosenbusch’s work on the microscopical physiography of minerals and rocks, published by Koch’s firm, E. Schweizerbart’sche Verlagshandlung, in 1873 (Rosenbusch 1873–7). The first volume has not been found, but the second volume is in the Darwin Library–Down.


Rosenbusch, Harry. 1873–7. Mikroskopische Physiographie der Mineralien und Gesteine: ein Hülfsbuch bei mikroskopischen Gesteinstudien. Vol. 1: Mikroskopische Physiographie der petrographisch wichtigen Mineralien. Vol. 2: Mikroskopische Physiographie der massigen Gesteine. Stuttgart: E. Schweizerbarts’che Verlagshandlung (E. Koch).

Variation: The variation of animals and plants under domestication. By Charles Darwin. 2 vols. London: John Murray. 1868.


Thanks for copy of translation of Variation

and the "admirable work on the microscopical structure of rock" [C. G. Ehrenberg, Mikrogeologische Studien (1873)].

Letter details

Letter no.
Charles Robert Darwin
Eduard Koch; E. Schweizerbart’sche Verlagsbuchhandlung
Sent from
Source of text
Cleveland Health Sciences Library (Robert M. Stecher collection)
Physical description

Please cite as

Darwin Correspondence Project, “Letter no. 9186,” accessed on 15 April 2021,

Also published in The Correspondence of Charles Darwin, vol. 21