RECORD: Darwin, C. R. 1874.04.15. Put Drosera in S. of Quinine. CUL-DAR57.9. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 1.2023. RN1

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).


[9]

April — 15 74/

Put Drosera in S. of Quinine for 1h or 2h & wash & put in C. of Amm 2 gr to 1 oz & see if aggregation, occurs, as such does not occur after with white Corpuscles, unless they receive oxygen from red corpuscles, which accordng to Binz is prevented.— Put fresh leaf for comparison for equal time in distilled water & then give both lots C. of Ammonia at same time

over

[Insectivorous plants, p. 201: "I was surprised at this fact, because quinine is said to arrest all movement in the white corpuscles of the blood; but as, according to Binz,* this is due to their being no longer supplied with oxygen by the red corpuscles, any such arrestment of movement could not be expected in Drosera."]

[9v]

Q. Journal of Microscopical Science April 1874 p. 185

But in Drosera there are no red corpuscles, which are the carriers of Oxygen—


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Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)

File last updated 14 May, 2023