RECORD: Darwin, C. R. Beta vulgaris [fig 200] / proof sheet of Forms of flowers p 48 [published pp. 92-94]. CUL-DAR209.7.6. (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).
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(Fig 200)
Heliotropism
Beta vulgaris— circumnutation of Hypocotyl, observed during 9 hours — from 8° 30 a.m to 5. 30 P.m. somewhat deflected by lateral light, The seedling traced on a horizontal glass. The upper side of the figure is that when the taper position when the lighted taper was held when each dot was made is shown by the general direction of the whole figure, & this coincides with that of the line between the two first dots a line joining the first & penultimate dots.
Tracing Figure here reduced to 1/3 in figure given of original tracing
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[proof sheet of Forms of flowers p 48, published pp. 92-94]
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 23 December, 2025