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).


22

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.]


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

File last updated 2 November, 2022