RECORD: Darwin, C. R. [1872-1873]. ['On the movement of the leaves of Drosera'], folio ?. CUL-DAR61.108. (John van Wyhe ed., 2002-. The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 12.2022. RN2
NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin. The volumes CUL-DAR 54-61 contain material for Darwin's book Insectivorous plants (1875).
The volume CUL-DAR61 contains Darwin's draft essay 'On the movement of the leaves of Drosera', written 1872-1873. He intended to publish this with a revised edition of Climbing plants before commencing a larger book draft in April 1874 which became Insectivorous plants. See the introduction to this essay by John van Wyhe.
[108]
Sulphate of Quinine - One grain was added to one an ounce of water, but all was not dissolved. Half-minims of the solution were placed on the discs of six leaves. No effect was soon produced; but after 23º one leaf had all its tentacles closely inflected; two had some few tentacles inflected; & the remaining three had none.
after 48º, from the time when the days were placed o given,
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 23 February, 2026