RECORD: Darwin, C. R. & Emma & Francis Darwin. [1877]. Acacia [application of water, ether]. CUL-DAR209.12.4-10. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 7.2023. 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-DAR209.12 contains material for Darwin's book Movement in plants (1880).


(1

Acacia unnamed cultriformis with vertical oval leaves, unequally lobed

(Young plant from Kew)

Beautifully silvery on both surface (when not rubbed) in cold water— removed quickly by immersion in Ether & then well wetted, but by blowing hard rendered partially dry

Agitation in cold water (57°) for 1m. left equally dry quite dry & silvery— (seems beautifully protected).

81°-80° for 1m— silver all gone except some specks & both surfaces now well wetted

75 1/2 - 75° for 1m. silver left in spots, larger or small; only left; & leaf largely spotted with water. Thus bloom is rather readily removed.—

Leaves oddly shaped— sub triangular, ending in little spikes (falsely— look as if growing out of stem.)

(Immersion for 2" - 3" in ether suffices to remove the bloom almost completely— a few small patches of silver alone left)

(In old paper I say only splendid bloom)

(2

Acacia iteaphylla, young plant from Kew, with very narrow sub linear vertical leaves curved — silvery on both surfaces in cold water (57°), but somewhat spotted with water, perhaps from not being very young— shaken for 1m in this cold water very [largely] spotted with water— very badly protected.

After immersion in S. Ether much wetted

80 1/2° - 80° for 1m both surfaces well wetted by blowing hard some surfaces become dry — Silvery appearance removed. — very badly protected

(3

Acacia (unnamed sp.) oval leaves — young plant from Kew. silvery & dry both surface in cold water 57°

81° - 79 1/2° for 1m. silver all gone— both surfaces strongly well-wetted

75° for 1m all silver gone on one surface & quite wet; on other surface, some silver in patches & dry dry on these patches.

→ (Immersion for 2" or 3" in S. Ether removes every trace of bloom Even a momentary immersion suffices.)

[4]

(24) dipped in water at 56 slightly spotted, shaken for 1m. in water at 78° not very many near perfectly wetted.

[slip of paper pasted on]

(8) Acacia, I think certainly somewhat like my greenhouse one ─ upper surface much wetted by cold water; other surface less─ whole leaf & edges absolutely vertical.

[slip of paper pasted on]

(2

(5) — ? both sides wetted cold water edges of leaves very vertical.

(6) — — upper side well wetted lower side considerably— cold water. edges of leaf vertical —

(3

[the section up to (11) is crossed]

All Acacias 

(2) (10) splendid bloom like on cabbage in cold water— oval leaves In w. at 71° for 1m bloom very slightly removed—: 81° 80' for 1m hardly hardly more removed — leaves sub-horizontal

(11) Eucalyptus — bloom on both sides cold w. Edges of leaves vertical.

(12) both surface, especially lower one much spotted with water. Edges of Leaves vertical

13 Splendid a. cultriformis bloom on both sides e leaves almost vertical. Vertical & bloom

[the section 14-16 is crossed]

14 Leaves rather broad, almost horizontal. splendid bloom, on both sides — Almost certainly Eucalyptus.

Temp. 81 to 80 for 1m bloom very slightly removed in patches.

15 Leaves almost completely wetted on both sides by cold water, but lower surface rather less. edges of leaves almost vertical.

16 Cold water, upper surface much wetted. Lower surface well protected. Edges of Leaves almost vertical.

[3v]

(26) Leaves vertical, both sides wetted

X (27) Leaves vertical, slightly silvery on both sides

shaken in w for 1m at 76° — imperfectly wetted — not wetted at all by w. at 56°

Vertical & slight bloom

(28) Leaves linnear, with edges vertical, completely wetted on both sides

(25) Leaves extremely long, linnear, like those of a grass, vertical, wetted on both sides, yet with a trace here & there of silver.

21 Leaves very narrow with their edges vertical wetted on both sides.

29 Leaves narrow with edges vertical, wetted on both sides

19. The same as last species—

(4

(36) Leaves shorter & stiffer, but in all other respects like the last

37 Leaves nearly the same, but more vertical wetted on both sides—

34 Leaves narrower, in other respects as the last

X 22 Leaves extremely narrow, sub-vertical with edges upwards, well protected by bloom on one side, moderately on the other Back

sub-vertical— slight bloom

30 Leaves prolongation of the axis, spinose wetted on both sides —

X 31 Leaves with edges vertical, soft spined on the end— vertical slight bloom

sub-vertical, upper surface well protected by bloom & hairs under surface mod. wetted

[4v]

(22) Dipped in water at 56° hardly at all wetted, shaken in do for 30s considerably spotted repeated this with the same result & still more when dipped shaken for 30s in w. at 81°— shaken in water for 1m at 80° almost completely wetted— leaves stand out nearly at rt ∟, but at upper end of shoots much inclined upwards

(31) shaken by for 30s in water at 56° very slightly wetted— one side hardly at all. — shaken for 1m in w. 78-77 fairly well wetted.

(5

20 Leaves narrow, short, sticking out at rather deflexed, ending in spines, edges vertical both sides wetted.

X 24 Leaves wi sub-vertical with edges upwards thickly covered with fine wool. Protective against water.

(35) Leaves linear but broad, with edges vertical, both sides rather easily wetted.

(23) Leaves rather broad, with edges upwards wetting as in last case —


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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 2 September, 2023