The Complete Work of Charles Darwin Online

RECORD: Darwin, C. R. n.d. Laurestinus (?) & deciduous Magnolia lower surface very greasy upper surface. CUL-DAR66.41. 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.

[41]

Laurestinus Sp. or (?) & deciduous Magnolia— lower surface very greasy, upper surface a little so — I tried scraping them, & I think some effect on lower surface, & not much on upper surface. —

Copper Beech & Italian Poplar leaves well greasy on both sides especially lower.—

Pear so slightly—

Apple lower surface woolly & wetted —

I suspect most leaves show what I call greasy ie not wetted, yet not silvery from adhesion of layer of air — & not affected by ether. — Try warm water. —

Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)