The Complete Work of Charles Darwin Online

RECORD: Darwin, C. R. 1877.11.20-21. Ipomoea nil. CUL-DAR209.4.182. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 9.2022. 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 volume CUL-DAR209.4 contains materials for Darwin's book Movement in plants (1880).

[182]

Nov 20 & 21. /77/ Ipomœa nil

Plant 3 1/2 inches high— Second internode above Cots. observed [sketch] in darkness & traced on Horizontal glass. Tracing magnified only 4.3 times— Greatest diameter of Tracing only 1 inch. Therefore extreme movement only 4.3/1 of inch. But as plant was observed in room at temp. of generally 56°, probably wd have moved more.— Certainly nutated, when observed in this manner, but I think not nearly so much as the seedling with Cots. — Judged by unassisted eye wd be said, as I stated not to nutate.

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