RECORD: Darwin, C. R. & Francis Darwin. 1874.07.01-07. Fibro-cartilage tail of Sheep / Draft of Insectivorous plants, folio 175. CUL-DAR57.99. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 1.2023. 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 volumes CUL-DAR 54-61 contain material for Darwin's book Insectivorous plants (1875).


[99]

July 1' 8° 10' Fibro-Cartilage tail of Sheep

5 leaves (on separate plate)— kept on wet moss for previous night

Put pretty good sized bits with little saliva & glands touched to ensure clasping —

July 2d (one with cartilage or perhaps areolar tissue dissolved) the 4 others not at all well clasped — moistened these with saliva —

July 3d 8° not at all well clasped the substance does not excite Drosera so much as gelatine or not more so — again moistened by saliva — The fibro-cartilage is effected & rendered more transparent

July 3 (74) Fibro-Cartilage — Sheeps-tail

Digested bit much more transparent: its tissue more muzzy— Disintegrates much more readily in teazing — On treating the both bits with acetic acid the undigested was much most affected showing that there was more unaltered areolar tissue in it

July 4 7° 40' The 4 bits in same state leaves but look even more transparent — I dabbed wi then with secretion by dragging them over many glands in hope of exciting the tentacles.

(5th in same state, not more digested.

(7th same state no inflection & no dissolution on the 3 remaining leaves with fibro-cartilage)

 

[99v]

([illeg])

during very warm weather, a

are sub-inflected See from

however in pure water, (a) Why

a difference in the sensitive

& the weak solution of ammonia, as well as of the

I have failed to ascertain

tentacles with leaves immersed in water may, I believe, b

accidental contact with

[The other fragment is in CUL-DAR57.102v, the full passage from both fragments reads as:]

during very warm weather, a large number of tentacles

are sub-inflected See from immersion during these

however in pure water, (a) Why there should be so great

a difference in the sensitiveness of the leaves to water

& the weak solution of ammonia, as well as of the different tentacles on the same leaf,

I have failed to ascertain; but some of the case of inflection

tentacles with leaves immersed in water may, I believe, accounted for by

accidental contact with the side of the vessel, or with

cut off.


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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 16 May, 2023