The Complete Work of Charles Darwin Online

RECORD: Darwin, C. R. [ny].11.28. A pot put behind red gelatine / Proof sheet of Forms of flowers, published, p. 88. CUL-DAR209.8.145. Edited by John van Wyhe (Darwin Online, htp://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 volumes CUL-DAR209.7-8 contain notes on heliotropism (phototropism) for Darwin's book Movement in plants (1880).

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Nov. 28

8°. 53 am a pot put behind red gelatine— examined at 4° P.m

4 plants curved, somewhat— none of the others, but then these otherwise are tall & ~~the~~ such little green leaves no are hardly acted on by light—

Another pot at same time behind yellow glass— Plants too tall, 2 of them shorter (& on these I placed tin-foil caps, which however were so loose that they fell off & might have admitted reflected light) & these shorter ~~ones~~ seedlings were bent towards light.

So that neither red-gelatine nor yellow glass stops movement!!! Sachs.

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[Proof sheet of Forms of flowers, published, p. 88.]

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