RECORD: Darwin, C. R. [1877].08.18-09.01. Crass. CUL-DAR66.163. 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.
[163]
Crass — Pods — not far from ripe
Aug 18th 5˚ P.m
12 pods cleaned & 12 with bloom to be syringed
Aug 25' none of cleaned pods yellow than of the non-cleaned.
― 21 Frank says "cleaned yellower"
25 Aug 29th 6 of the cleaned still greenish; every one of those with bloom brown.
Sept 1 The cleaned decidedly greener & the seeds within not so dark a brown, as those with bloom — Removing the bloom has certainly delayed ripening of pods & seeds
Aug 12. 5˚ P.m
12 pods cleaned & 12 with bloom to dry
Aug 21. Frank "cleaned yellower", but cd this be due to removal of bloom
Aug 25 no difference between them.
27 The cleaned certainly rather browner more than can be accounted for by colour of slight bloom.
29th [illeg] of those with bloom still greenish so all of the clean
Sept 1 The cleaned certainly browner & I do not think due to retention of
(over)
[163v]
bloom by other lot anyhow account for difference of tint, as after sponging with ether very little difference — no difference in colour of seeds within
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 6 July, 2023