RECORD: Darwin, C. R. [1873].09.15. Chloride of caesium / Magnesium nitrate, acetate, chloride / Lithium. CUL-DAR56.69-78. (John van Wyhe ed., 2002-. The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Text prepared and edited by John van Wyhe. 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).


69

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Sept 3rd.    10. 10'    Chloride of Caesium    1 gr. to 1 oz..    30 minimum to each leaf — 4 leaves

(11. 15', glands darkened

(2. 30'    a trace if inflection)

(4º 50', 2 leaves greatly, but not closely : the other 2 considerably inflected)

   (9. very considerable inflection)

Sept 4th    8. 30' — immense inflection — lamina of 2 leaves inflected— in one young leaf the extreme marginals not inflected, all others inflected — glands rather dark — put into pure water

Sept 5'    8. 30'    largely reexpanded; one alone partially inflected

do.    10. 30'    Nitrate of Magnesium (as above)

   (4º 50' no effect

Sept 4th 8. 30. No more action in the 3 salts of Magnesium than often occurs with pure water when aft so many hour — One leaf in the Acetate considerably inflected— a little inflection in some of the Chlorides— I have Phosphate of Amm 1 gr to 20 oz. to all 3 plates

Phosphate

(9th    8. some inflection — (10. 25' moderate infl.) (1. very considerable inflection in all 4 leaves)

Sept 5'    8. 30' — all leaves very moderately inflected

70

(8

Sept 5th    10. 38'

Acetate of Magnesium    1 gr. to oz.    30 minim to leaf—    4 leaves all as before

(4º 50' no effect)

(See last page) Phosphate

9. 5' some inflection

10. 30'    rather decided

(1. very moderate inflection in all)

Sept 5th 8. 30' greatly, but not extremely inflected

do 10. 45'    Chloride of Magnesium as above. — 4 leaves.

(2. 30', a trace of inflection)

(4º 55', some slight inflection, chiefly round discs of 2 leaves; but not more than sometimes, even often occurs with water)

   (See last page) Phosphate

9. 5'. enormous inflection from the Phosphate, 2 of lamin quite close)

1. all 4 leaves with almost all tents closely inflected)

Sept 5th    8. 30'    all leaves greatly inflected:

71

(10

Sept. 4th    8. 52'    Lithium Acetate 1 gr. to 1 oz    4 leaves with 2 dr.

10. 20' no action nor below

8 [x] 2 [=] 16    1/16.

(1º, O)

Sept 5'    8. 40', no inflection    added Ph of Ammonia.

―    9. 10'    all leaves immensely inflected.

―    10. 55'    enormously inflected — lamina of one, thrown away

 

 

do.    9.    Nitrate of Lithium    do.    do.    do.

(1. ,O)    10. 30' P.m.    a little inflection in all 4 leaves

Sept 5th    8. 40' — very considerable inflection in all 4 leaves    added pure water

―    great infl

Sept 6th    8. 30;    still inflected

― 7th    10. 30'    still somewhat inflected

72

(11

Sept 4th    11. A m.    Rubidium Chloride

1 gr. to 1 oz —    1/2 dr. as usual

(1º, O action)

Sept 5th    8. 40'    no inflection    added Phosphate of Am.

―    9. 10'    all leaves enormously inflected

      11.    do    do— (Thrown away)

 

Sept. 5    8. 55'    Chloride of Aluminium    as above.    4 leaves.

11. no inflection

4º. 40' no inflection

Sept 6'    9. 30', 1 leaf closely inflected, 2d moderately, 3d & 4th hardy at all    perhaps not more than water in effect    or only a little more

― 9. 8'    put into Phosphate of Ammonia

   4º 45' at least 3 of leaves pretty closely fairly closely inflected & a few large number tents on the 4th

73

Sept 5'    9..    Nitrate of Aluminium 1 gr to 437.5 water    4 leaves—. each with 1/2 dr. of above

   11. no inflection

   4º 45'    no inflection worth speaking of

Sept 6    8. 30'    one leaf moderately inflected

―    9. 10'    put into Ph of Ammonia

―    4º 45'    in many same state as at 8. 30'

Sept 7'    10' 40', all four leaves moderately very considerably inflected, one quit closely    almost all the younger tentacles in the other leaves

      one leaf pretty closely inflected, some slight inflection in the other 3 leaves; but very slight— but perhaps not more than by water

74

(13

Sept 5th    10. 23'    Acetate of Borytes    4 leaves.    2 dr of soln    1 to 437.5 water

(11º', O)    (4º 45'    no inflection)

Sept 6th    8. 40'    hardly no inflection— glands blackened showing absorption added Phosphate of Ammonia at 8. 40'

4º 50'    a little inflection in 2 leaves

Sept 7th    10. 45'    same state

 

Nitrate of Borytes.     do    do    do.

   10. 25'.

(11º, O) (4º 45', some slight inflection in 2 leaves, none in other two)

Sept 6th    8. 40'    no inflection worth speaking of; added Phosphate of Ammn (1' gr. to 20 oz) at 8. 43'

   9. 13'    grt. inflection in one leaf; some in 2 other leaves

   4º 50'     do      .       do

   Sept 7th    10. 40; —    in nearly same states as last night

75

(14

Sept 5th.    10. 30'    Acetate of Strontia    4 leaves    2 dr of sol.    1 gr to 1 oz

(11º, O) (4º 45' no inflection)

Sept 6'    8. 45'    no inflection except some tent. over pedicel—    put in Phosphate of Ammonia at 8. 48'

   9. 13'    great inflection in 2 leaves

   4º 50'    do    do   ; considerable in a third; a trace in a 4th

   Sept 7th    10. 45'    in exactly same states

10. 35'    Nitrate of Strntia    do.    do.. do.    5 leaves

(11º, O) (4º 45' some slight inflection in 4 out of the 5 leaves.)

Sept 6th    8. 45'    no inflection worth speaking of, not more than last night ,put in to Phosphate of Ammon at 8. 50'

― 9. 15,    hardly any more inflection.

— 4º 50' — moderate inflection in 3 leaves.

   Sept 7th    10. 45    very moderate inflection in all 5 leaves; not close in any one leaf — glands dark red

76

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Sept 15    10. 45'    Acetate of Quinine    4 leaves with 1/2 dr of sol. of 1 gr. to 1 oz of W.

10. 5'5'    great inflection !!    (sol is not acid )

4º, 45 enormous inflection; put into pure water

Sept 6th    8. 50'    as closely inflected as ever; glands somewhat whitened.

― 7'    10. 30'    do    do    .do — glands white manifestly killed

 

Nitrate of Quinine    do    do.    do

10. 48'.

10. 58'    a trace of inflection over pedicel in only 2 leaves.

4º 48'  50 hardly a trace if inflection, —perhaps a trace

Sept/ 6th    8. 50'    all 4 3 of leaves pretty closely inflected far more than wd have occurred in water; but not like those in the Acetate the 4th leaf very slightly

   Put into plain water at 9..

Sept 7th    10. 31'    Now somewhat expanded; but 2 of the leaves still somewhat inflected; most of the gland whitish or pale brown— evidently much injured

Sept 8th    8. 45'    most of the leaves with tents almost completely reexpanded    but the glands discoloured

77

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Sept 5th.    11. 13'    4 leaves in 2 dr. of Hydrochloric 1 part to 2 oz of water or (437.5 (x) 2 (=) 875.0 ) 1 to 875 acid.

2. 30'    one leaf out of the 4 rather inflected

4º 50    the above leaf greatly inflected; some inflection in the two others.

9. 40, mod. inflection in 2 leaves; slight in a 3d leaf

Sept 6th    8. 15' 20' aft 21h — all 4 leaves moderately inflected,    put into pure water. —

Sept 7th    10. 35'    some inflection in 3 of leaves — a trace in 4th    glands red— I think are recovering

Sept 8th    8. 40'    all 4 leaves fully reexpanded & look quite healthy.

   Put them in Ph. of Amm. 1 gr to 20 oz

Sept 8th    8. 20'    The Ph of Amm has produced no effect    the leaves still remain fully reexpanded — such long immersion has injured them; as indeed does pure water for 24º.

78

(18  17 (6 B

Sept 9'    8. 57'

Chloride of Platina    30 minim to each leaf m. to 3 leaves    1 gr. to 1 oz of water

  9. 13' splendid inflection

   9. 45 immensely inflected

   12. glands rather brown pale — but spec looks fresh & good

   2. Sept 10th    8. 30'    glands all white — closely inflected.— otherwise leaves look healthy

   Sept 11.    8. glands colourless, none expanded

      13th    8. evidently dead still closely inflected, but not much discoloured except glands

no plain segregation

Chloride of Gold.    do    do    do    (8. 58' )

   9. 6'    some inflection — (9. 13' in 1 leaf

   9. 45    immensely inflected

   (12. glands discoloured— fluid coloured purple

   (2. 50'    into pure water) Film of gold — some of excessive teeming after the fluid.

      the glands are I think coated, & I thought so ▿2 or ▿3 hour ago

   (I can see no gold on the dried glands.)

Sept 10    8. 30'    excessively discoloured — evidently killed— The little points on disc & hair on pedicels all coloured black

Nitrate of Silver    do.    do

8º. 9 2'

   9. 7' slight inflection — (9. 13' very strong inflection glands excessively blackened & have exuded blackened fluid & viscid secretion blackened— also Hair on peduncle & little points & on the tentacles before the tentacles on the disc —(see to these) All the water coloured.)    They are little projecting Points. & apparently are absorbent

   9. 45    immensely inflected & blackened

   (11. the black is spreading from the little points

   (2. 55'    put into pure water) There were films on black fluid which looked silvery whether really so, I know not .)

Sept 10th    8. 30'    Astonishing black — evidently killed.

78v

Sept 19th 9. A m — the fluid is now dingy purple & there is much more inherent golden films on surface & apparently on the gland— So that I do not know whether some may not aggregate in the fluid. — I can see quite plainly layer of gold over disc of 2 leaves which I discovered yesterday— This looks as if falls on disc— Perhaps safest wd be to say is precipitated on or near the glands which go on secreting &   probably some aggregation in the generally fluid

(Sept 19 20th In course of day ie the 19th the oily golden film certainly increased so that the gold does aggregate from the secretion, but I think most energetically from the on or close to the glands— These golden films when lifted off on paper are purple with a metallic coat on the surface — Plenty of gold on disc & glands of other leaves— the paper from bit being coarse enough does not shine, but this case shows surface of gr purple matter becomes metallic — The bottom of saucer in which fluid was is all fairly gilded. —

(I put a drop of nitrous Muriatic A. on the fairly gilded saucer & it entirely removed the gilding & this left white spot)


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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 9 January, 2026