RECORD: Darwin, C. R. [1874]. Draft of Insectivorous plants. CUL-DAR59.1.6r. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 10.2022. 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).


(223

meat, secrete, but so do the glands those at some distance all around, & I believe over the whole surface of the leaf, pour forth their secretion whether this is due to the actual spreading of the secretion containing which has absorbed some of the nitrogenous matter from the object, or the [radiation] of some obscure influence from the affected glands to the other glands I am not prepared to say. (But it is clear from the facts that the glands in order to secrete require a double stimulus or contingency, namely one a stimulus due to the closure of a leaf or, one radiatingfrom a touch applied to any one of the six sensitive filaments; & another stimulus from actual contact with soluble nitrogenous matter, or from the affected transmitted affect one transmitted from the affected glands to the others.) The secretion is so copious that in one one case Mr. Canby saw (as stated in a letter to Prof. Asa Gray & forwarded to me) a drop depending from the edges of a closed leaf on which he had placed closed over a bit of raw meat. On another occasion I placed a large Tipula [thread] cells are is formed to in a segregated condition, of which there is not a trace [text excised]

[in margin:] This had both come afterward or separate paragraph


Return to homepage

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

File last updated 3 November, 2022