The Complete Work of Charles Darwin Online

RECORD: Darwin, C. R. [1877].09.20-25. Acacia cultriformis. CUL-DAR68.158. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 4.2023. 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-DAR68 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.

[158]

Acacia cultriformis

Sept. 20' 5° 15' P.m.

2 twigs of nearly equal size all leaflets sponged so that bloom removed & hung up to dry. —

Sept 24th basal leaves of cleaned feel drier in morning F. & L. tried leaves blindfolded & picked out instantly the cleaned as driest, feeling base of twig.

Sept 25 9° a.m. The leaves on the cleaned twigs are now cracking to apex. —

Twigs 4 1/2 inches on length.

Put into candle & the d cleaned burnt quickest— Leaves on phylloid of cleaned drop off when handled. —

No doubt whatever.

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