RECORD: Darwin, C. R. 1874.06.04-07.02. Sugar / Proof sheet of Expression. CUL-DAR59.1.64-65. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 10.2022. 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 volumes CUL-DAR 54-61 contain material for Darwin's book Insectivorous plants (1875).
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Sugar
July 1' 8˚ 58'
Bit of sugar on leaf (beyond blue Head) & bit of same size of glass moistened —
(under Bell-glass— absorption very moist) to see about absorption of sugar
(12˚ se very great secretion) (1˚ has run down 2/3 of leaf
4˚ 40' whole concavity of leaf filled with very viscid secretion, not in the least acid
2d 8˚ leaf still full of non-acid secretion
July 2 74—
No marked difference in aggregation in the parts that have had sugar. Many of the long stalked glands in all parts are cloudy
[22v]
[Proof sheet of Expression, p. 283.]
23
Jun 4th 7 55' stick paper Head—
(Drosera)
4 squared slices of Boiled rice on discs.
Jun 5' 7˚ 40' 2 leaves well clasped & same.
2 very slightly clasped (Look in Watts about rice)— not mentioned)
Jun 6th 7˚ 45' all 4 leaves fully expanded with no trace of inflection —
Pinguicula seems much more affected by slice of rice than Drosera
Digestion
[23v]
[Proof sheet of Expression, p. 359.]
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 2 November, 2022