RECORD: Darwin, C. R. 1879.01.07-10. Trifolium resupinatum. CUL-DAR67.57-58. 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-DAR67 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.
[57]
1879 Trifolium resupinatum
Jan. 7th 10˚ 30' a.m a little Plant with 5 leaves, 3 long & 2 short pulled up & put under tumbler in study so as to dry slowly—
8th 8˚ a.m. The bloomless half of the 3 taller leaves curled downwards & upper surface more plainly ribbed than the other half with bloom.
3˚ 2 little leaves with edges rather more infolded
Jan 9th 8˚ a.m now too dry, but can yet see that the bloomless half of most of the leaves most curled inwards
[58]
Dec Jan. 7th 1879. Trifolium resupinatum.
10˚ 35' a.m.
Plants growing — rather young in greenhouse, brought into study. 4 leaves white thread, bloom & unbloomed have painted of opposite lateral leaflets painted with olive oil & Lamp-black. —
10˚ P.m— All the painted ones went to sleep
Jan 9th 8˚ 30' — There is no difference in the degree to which the bloomed & unbloomd halves have absorbed the oil
10th 9˚ 15' a m Certainly no difference in degree to which grease has been absorbed by the two halves
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 14 June, 2023