RECORD: Darwin, C. R. 1879.04.30. Pharbitis nil / Proof sheet of Forms of flowers. CUL-DAR209.7.58. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 8.2022. 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).
[58]
April 30th 1879. Pharbitis nil before N.E. window
6° 45
11. 20' 1/2 ⨀ completed to light
2° 48' 1/2 ⨀ completed from light
Semicircle to light (6° 45' a.m to 11° 20') took 4° 35'
— from light (11° 20' to 2° 48) took 3° 28' / 1. 7
Therefore moved slower to light by 1°7' than to dark side
Move so slow must have been unhealthy
[58v]
[Proof sheet and corrections of Forms of flowers, p. 107.]
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 25 September, 2022