RECORD: Darwin, C. R. 1877.01.05-11. Cassia corymbosa. CUL-DAR209.6.38. 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 volume CUL-DAR209.6 contains materials for Darwin's book Movement in plants (1880).

Notes for Movement in plants. Text F1325


[38]

Jan 5. 1877 Cassia corymbosa (from Thompson

Cots. at right angle to stem pinched both surfaces then irritated for 30" — did not move in the least! — Goes to sleep very well & early about 5° P.m — Jan 6 No Bloom — rubbed upper side — very slight subsequent shaking rising of one Cot.

Jan 6th in my Study rubbed with stick upper surface of Cot for 30" & the 2 then formed ∠ of 118°. In the course of 5' the angle was reduced to 105°. ie 13 ° 7 1/2 after an interval of 50' angle was 100° 9 & I believe by that time had begun to open again

(Used)

Jan 7th. Still kept in study the Cot was irritated for 2', but did not move in the least, so it seem must be kept hot to be sensitive in the small degree above shown.— (over)

Try rubbing upper surface in Hot-House

[in margin:] In rubbing upper surface in Hot-House

[38v]

Jan 11' Tried in Hot-House & the Cots were not sensitive, so apparently sensitivity soon lost


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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 21 January, 2023