RECORD: Darwin, C. R. [1873].06.10-14. [Drosera?] [application of water, camphor. CUL-DAR55.118-119. 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).


[118]

Jun 10th

Water spec

9˚ 31' put 2 leaves in water took out after 5' washed & brushed once to see if inflection comparison for Camphor specs

9˚36' washed for 15" & then brushed twice or thrice same brush & so put in distilled water at 9˚37'

9˚41' trace of inflection in one (thicker stalk)

9˚42' not in other

9 45' inflection not increased

10˚22' no increase

I then put the uninflected inflected both leaves leaf of the other 2 in Camphor w for 2' & after 2' took out one & washed & put it in water, & Brushed it once took out of Camphor at 10˚25'

a little before 10˚26' Brushing once, finished

― 10˚35' no action in either leaf

10 52' do do. do

11˚20' do do o} water stops absorption of or action of Camphor

→ N.B the second leaf was left all this time in the Camphor water

12˚50' (only discals inflected.)

60 [-] 9 [=] 51

This shows that immerse for 50" in water stops the action of camphor during 2 hours immerse in camphor — 2 leaves, & one Brushed

[118v]

[Proof sheet of Expression, published, p. 353]

[119]

Plain Water

June 13th 7˚47' immersed in distilled water all 3 Brushed twice 5/5 with carnel at 7˚52' (ie after 5') (9˚, 0) (10˚30', 0) (11˚15' 0)

(2˚, 0)

(4˚30' 0)

3 leaves

Jun 14' 7˚45 no effect— — no ropes of mucus — put on bits of meat

4˚45' not inflected

15 8˚not inflected

(Keep for Water)

[119v]

[Proof sheet of Expression, published, p. 344.]


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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 14 May, 2023