RECORD: Darwin, C. R. & Horace Darwin. 1873.09.25. Raspberry. CUL-DAR66.21. 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.
[21]
Down.
Raspberry
Sep 25 1873
Protected under neath side of leaves by fine t wool
Put in at 85° wool was dry when taken out & shaken. —
[21v]
Put 26 Rue-leaf 87 to 86 beautifully silvery on both sides in old cold water watch for 1h quite wetted on upper side & silver partly gone, but still quite silvery on lower side & dry when taken out
The protected leaves of Red Beet dipped in cold water not silvery & yet are only imperfectly wetted, immerse for 1h in water about 85° seemed to make no plain difference
White Dutch Clover lower surface of leaves beautiful silvery immerse for 1h 84 1/2 to 83 1/2 no effect
95°-94° for 1h silver partially & largely gone & surface much wetted
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 26 June, 2023