RECORD: Darwin, C. R. CUL-DAR209.8.144. (John van Wyhe ed., 2002-. The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed and edited by John van Wyhe. 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).

144

Nachwirkung

Sept 28th

At 3. 59'; ie After 14' had advanced through nachwirkung to light— After 8' had gone back only a little & obliquely; after additional 6' a little further back, zig-zag.— Therefore I believe at 3° 59' had only just begun or not yet begun to go back & if so nachwirkung lasted for 14' not 4 18' ; but we must remember that seedling exposed for only 1° 27' to cloudy sky before light shut off.— By 5° 6' (ie after 1° 7') had gone back through apogeotropism to where had started at 2° 20'.—

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

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