RECORD: Darwin, C. R. & Francis Darwin. 1879.09.04-08. Sea Kale sleeping. CUL-DAR209.3.120. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 11.2022. 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-DAR209.3 contains materials for Darwin's book Movement in plants (1880).
[120]
1879
Sea Kale Sleeping
Two young leaves growing in kitchen garden: long filament shellacked (6. 10 pm Sep 4th) to leaf & angle measured with horn protractor─
Sep 5
Sep 6
Sep 7th Sep 8 |
10.59 am 10.10 pm *11.32 am. 9.5 pm 9 pm 12.30 pm (noon) 9 pm |
I 60˚ above Horizon 72˚ ─ rise 12˚ 41˚ above 60˚ 51˚─ rise 10˚ 30˚ § filmt blown away |
II 44˚ above 55 rise 11˚ 49˚ above 55˚ [-] 49 [=] 6 ─ rise 6˚ 52˚ ─ rise 3˚ 40 43 – rise 3˚ |
*Now noticed that filament on plant ii is loosed above & only holds below. If I may assume that it broke loose in the night it will not put anything wrong as it will be the same for morning and & evening of Sep 6.
§ Now saw that filament on plant i was loose above
It is manifest the leaf rises at night I might take average of 7 observations
12˚ [+] 11 [+] 19 [+] 6 [+] 10 [+] 3 [+] 3 [=] 64
64 [-] 63 [÷] 7 [=] 9˚
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 14 December, 2022