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Darwin Correspondence Project

To Daniel Oliver   12 [October 1860]1

15. M. P. | Eastbourne


My dear Sir

One line to amend my request, if you try the C. of Ammonia experiment.— please drop the third drop on midrib of leaf on inside or upper side of leaf.—

Yours | C. Darwin

I am sorry that you have my Origin;2 I hope you won’t think me bothersome, but would you like to have my Journal of Researches or Travels?3 I shd. like to send them to you.—

If Dionæa is allied in its moving apparatus & whole structure to Drosera, as I suspect from what little I have yet seen; then the absorbing surface, wherever that may lie, would be shown by C. of Ammonia causing contraction; & that is why I want you to try, middle parts of lateral disc & midrib & sensitive Hairs (& marginal Hairs?)


See preceding letter, n. 1.
The letter is tipped into a presentation copy of Journal of researches (1860).


Journal of researches (1860): Journal of researches into the natural history and geology of the countries visited during the voyage of HMS Beagle around the world, under the command of Capt. FitzRoy RN. By Charles Darwin. Reprint edition. London: John Murray. 1860.


Wants to amend request [see 2946] if DO wants to try carbonate of ammonia experiment. Put third drop on midrib of leaf [of Dionaea] or inside upper side.

Sorry DO already has Origin. Would he like Journal of Travels [Journal of researches]?

Letter details

Letter no.
Charles Robert Darwin
Daniel Oliver
Sent from
Source of text
UCL Library Services, Special Collections (Tipped into Journal of researches (1860) REF COLLECTION K SMITH WOODWARD DAR)
Physical description
ALS 2pp

Please cite as

Darwin Correspondence Project, “Letter no. 2946A,” accessed on 21 July 2024,

Also published in The Correspondence of Charles Darwin, vol. 8