RECORD: Darwin, C. R. [1874]. Drosera / Gluten (application also of saliva, hydrochloric acid). CUL-DAR57.112. (John van Wyhe ed., 2002-. The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Text prepared and edited by John van Wyhe. RN2

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).


112

Gluten Drosera Gluten  

July 6    8. 45'

2 square sticks    dried gluten=films

July 7th    7. 45    so much clasped — I cannot see state

July 8    7. 45    1 leaf still clasped— 4 other only slightly with much gluten still undissolved.)
(9th, one leaf open I   see some gluten left, brown in drawn out threads; & many glands whitened, in this case at least too powerful.)
(10th 8º, 2d leaf now expanding Some gluten left & every gland on the disc killed: this will account for small digestion like some meat

2 round sticks    gluten treated for 15. with Hydrochloric acid    .02 per cent — softened & swollen See Back)
(July 7th    7. 40'    so much clasped I cannot seen)
July 8th    7. 40' entirely open, I can see little opake matter on disc but after this was scraped off I could se none, F scraped all slime off the 2 leaves & F. examined under compound & nothing cd b seen besides starch granules & [illeg]

July 7th 8. — 3 leaves stick with white wool— Some much liquefied gluten after acid — a good deal on each leaf
(July 8th 7. 45 leaves nearly open, & almost all has disappeared)
(9th 8. most l all leaves fully expanded, in 2 of them more traces here & there & bit .not wholly dissolved — in the 3d quite dissolved, secretion acid, glands in one rather pale)

over


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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 9 January, 2026