RECORD: Darwin, C. R. 1873.12.09. If I prove sun light & water are injurious it may be that leaves are vertical. CUL-DAR66.29. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 3.2023. 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 volume CUL-DAR66 contains notes on 'bloom'. Francis Darwin explained: "His researches into the meaning of the 'bloom,' or waxy coating found on many leaves, was one of those inquiries which remained unfinished at the time of his death. He amassed a quantity of notes on the subject". LL3: 339. See an Introduction to these folders by Christine Chua & John van Wyhe.
[29]
Dec. 9th / 73 / If I prove sun light & water are injurious it may be that leaves are vertical or more move vertically at night to protect themselves from dew at night.—
(Actinia Roy depend on height of Sun)
Yet sun not very powerful in early morning & beads soon evaporated. — will explain cases like Trifolium repens, for wet under surface wd be upper, & bloom on lower surface of Cassia.
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 28 June, 2023