RECORD: Darwin, C. R. 1878.01.29-30. Phalaris canariensis. CUL-DAR209.8.81-82. Edited by John van Wyhe (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).
4
Jan 29th /78
Phalaris canariensis
Nice young seedlings raised in Greenhouse, exposed to light at 8° 30' a.m, removed at.— Day bright & frosty.
5 painted with O. oil & Lamp-black .25 down from tip all 5 perfectly vertical
Oil
4 painted do .25 high from ground
Lower part of all 4 quite vertical; upper & unpainted part of 2 very slightly curved to light, but then with free seedlings curvature chiefly in lower part
2 (with narrow quills internally fastened with shell-lac very slightly curved to light, far less than the free plants) quills
(Painted useless)
2 with splints of glass (.26. & .28 long) fastened with shell lac to summits (Splinter)
Both considerably curved to light, but rather less than free plants Phalaris
[4v]
2.— both curved in lower pair but less than free ones
3 — decidedly curved
6 — somewhat curved, but less than the free ones.
4 2 as much bowed as any — 2 slightly
[total] 15.
[82]
Laterally painted
3 painted with do. whole length on one side vertically & on side turned from light, so that normally there ought to bend much to light-side.
Phalaris
two vertical to light-side, 1 slightly curved from light ie to dark side
Jan 30th all 3 slightly curved to black side
I do not doubt grease
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 25 September, 2022