RECORD: Darwin, C. R. 1872-4. Index & Abstract of Pure Water experiments. CUL-DAR56.134. (John van Wyhe ed., 2002-. The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and John van Wyhe, edited by John van Wyhe 2.2023. 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).


134

(1

Index & Abstract of Pure Water experiments Eastbourne.

I give abstract of 11 leaves, but than I did not then distinguish inflection of long-Headed & oval Headed.

At p 22 I speak of 4 leaves in "pure" water & 3 became much inflected in 3˚. —

At p. 26 I put 4 leaves in "distilled" water for from 2˚ 40' to 3˚ 50' — "marginal tentacles more or less inflected"; in 2 spec. about 1/2 inflected; in other 2 a fewer number.—

Down 1872. Inflection

p. 12

no' of Leaves
1

after 15º 15' several sub-central t. "considerably inflected", 20 m. of W.

12A

1

after turning it upside down, in 1º .33' a few tents near pedicel inflected
in 5º 30', only 7 marg. t. now inflected, a few sub-central sub-inflected
after 23º hardy any inflected . 10 minims

13

1

after 1º 43 & 2º, 20' & 5º   (1º 43 to after 5º 35) 18 20 ts. somewhat inflected, chiefly the only marginals
   after 21º less inflection.    10 minims

14

5 leaves.

first turned upside down in 20 m. — no effect (except long-Headed)
not effect in 8º 10' — After 23º. no inflection except in 2 leaves which had respectively. about 12 & 6 inflected sub-marginal inflected    The marginals reexpanded

15

4

in saucer of water, turned first upside down, after 1º 20' a good deal of inflection in all 4. — After 5º 35'— only long-Headed inflected, with 2 leaves having few round-headed inflected. — After 21º all the marginal not reexpanded, with some sub-marginal still inflected in 2 of the leaves.— After addition 24º no more inflection

 

—— I might add 13

 

16

5

in saucer , first dipping them, but not turning upside down. After 1º some long-Heads inflected— After 6º 20' do. After 24º none inflected.

17

5

in saucer first dipping them— Hardy any effect.—

18

3
13
25 Leaves

in wine-glass, first dipping them, in 45' several long-Heads inflected —After 3º several reexpanded — After 8º 30' none of any leaf much inflected.

 

(over

 

134v

(I am inclined to believe that some of the cases of inflection were due of the oval-glands to their being touched, whilst turned upside down —) & pushed under water.—

The later (1874) Phosphate of Am Experiments & Abstract of all Water Experiments


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

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