RECORD: Darwin, C. R. [ny].10.25. As t[entacle] remains so much longer over meat than over inorganic. CUL-DAR60.1.114. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 12.2022. 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).

[114]

Oct. 25

As sec t. remain so much longer over meat than over inorganic some motor impulse must be continuously sent down one t. — But it appears from fly observation & other analogous ones, that as soon as gland stimulated, within a few second a strong shock of m. impulse is transmitted, which if strong enough will cross whole leaf even transversely & readily in a longitudinal line.—

"We may conclude that when gland stimulated it sends forth a shock of m. imp. & appears as long as stimulus & secreting acid— a very feeble continuous stream.

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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 12 February, 2023