The Complete Work of Charles Darwin Online

RECORD: Darwin, C. R. & Francis Darwin. n.d. Azalea indica. CUL-DAR209.3.75. 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).

[75]

Azalea-Indica

Azalea in pot taken out of green house to my downstairs room with fire— Glass filament fixed to shoot, paper mark & horizontal glass. Japanese screen all round so that light came in at top— Plant was moved same day observation began— Multiplying power various, 40 or 50 times — Bush 21 inches high to top of shoot observed. —

Bushes selected for trial as less likely to circumnutate.

I consider no doubt about circumnutation— young shoot tried.

[calculations not transcribed]

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