RECORD: Darwin, C. R. [ny].11.14-25. Mustard. CUL-DAR209.7.72. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 8.2022. 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-DAR209.7-8 contain notes on heliotropism (phototropism) for Darwin's book Movement in plants (1880).
[72]
Sleep of Cotyledons
Nov. 14th
Mustard. I can see no evidence of what may be called sleep During short winter day. Strongly Heliotropic will turn twice during single day to light in reversed directions. The stem bend to rubbed side — tried on 9 seedlings (used)
[72v]
Mustard Nov. 24th 10° 15' P.m, the upper Cot. in 3 vertical, not so in 2 others.
Nov. 25' 7° a.m. these Cots certainly not so vertical as they were at night. —
Nov. 25' 12° noon.
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 25 September, 2022