RECORD: Darwin, C. R. 1877.09.14. in the specimen of Drosera placed in weak N. of Silver. CUL-DAR60.1.71. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 12.2022. 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).
[71]
Sept. 14' 77 in the specimen of Drosera placed in weak N. of silver. (1 gr to 437. water) I see besides the glands the little prominence formed of 2 or 3 cell on the tentacles & on the disc all quickly blacken, & black specks radiate from them into the tissues of the disc. The spiracles absorb none.— Whether they really act as absorbents, or whether the outer membrane is thinner & allows the nitrate to penetrate quicker than through the cuticle of the disc, I cannot say.—
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 3 February, 2023