The Complete Work of Charles Darwin Online

RECORD: Darwin, C. R. and Horace Darwin. 1877.08.15. Horace Phaseolus vulgaris. CUL-DAR209.10.67. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 7.2022. 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-DAR209.10 contains notes on sleep (Leguminosae) for Darwin's book Movement in plants (1880).

[67]

Horace Phaseolus vulgaris

DOWN, AUG. 15TH.

1877.

DWARF KIDNEY BEAN. AT 8-45 YESTERDAY P.M OBSERVED THE ANGLES WHICH THE LOWER PART & THE UPPER PART OF THE PETIOLE MADE WITH THE HORIZON, & AGAIN OBSERVED THE SAME ANGLES & FOUND THAT THEY HAD NOT ALTERED PERCEPTIBLE.

IN ANOTHER LEAF OBSERVED ONLY THE LOWER PART OF THE PETIOLE AT THE SAME TIMES AS THE LAST EXPERIMENT, & FOUND THAT IT HAD MOVED FROM 26 DEG. TO 32 DEG. THUS HAVING FALLEN THROUGH 6 DEG.

[insertion by Darwin:] when it went to sleep. On the night of the August 15th I observed the plants out of doors & found most of them with leaflets drooping & asleep.

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