The Complete Work of Charles Darwin Online

RECORD: Darwin, C. R. [1881].12.05-07. Hevea spruciana. CUL-DAR62.105. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 5.2023. 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-DAR62 contains for Darwin's papers 'The action of carbonate of ammonia on the roots of certain plants', 1882, F1800 and 'The action of carbonate of ammonia on chlorophyll-bodies', 1882, F1801.

[105]

Hevea spruciana (Indian Rubber Plant) Lycopodiaceæ ~~pla~~ roots thick placed at 2° 40' P.m on Dec. 5 in sol. of 4 to 1000 & examined 9° a.m showed no clear signs of aggregation. —

Slices of roots which had been immersed, as above, in the C. of A. were left for about 2° in watch-glass of water with 2 drops of 1 per c. of osmic A.—

In many of these roots no agg in exterior cells, but in some many cells were filled with agg. orange matter & a few with dark-brown almost black— granular matter. There were also in the underlying parenchyma cells (as in Eu. peplus) several isolated cells filled with dark brown, almost black granular matter.)

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