RECORD: Darwin, C. R. 1877.01.06. Phalaris (Canary grass) / Proof sheet of Forms of flowers, p. 112. CUL-DAR209.8.72. (John van Wyhe ed., 2002-. The Complete Work of Charles 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 volumes CUL-DAR209.7-8 contain notes on heliotropism (phototropism) for Darwin's book Movement in plants (1880).
[72]
Jan 6' 77. 8º. 20
Canary grass placed in dark
Effects of painting one side with oily matter
(7) & (8) Spermaceti & Lamp-black on one side— (which previously had splinter of glass
4º 30 both considerably curved— especially the taller one
(A) Spermaceti ointment which had splinter—already much bowed obliquely to light
not curved
(10) 2 tall ones upright which had splinter attached with olive oil & Lamp-black
4º 30' straight, but whole plant inclined to painted side
(9) much inclined to light olive oil & black
4º 30' slightly curved
(B) short plant slightly inclined to light oil & black
upper part curved
These observations show that when one side painted the other side goes on growing & thus the unpainted side become convex
[72v]
[Proof sheet of Forms of flowers, p. 112. Published p. 224.]
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 25 September, 2022