The best way to see cell movement in Drosera hair, is to cut off those lately inflected over a fly, sketch shape of red matter under high power, and repeat after one or two minutes.
15. M. P. | Eastbourne
My dear Sir
Just received your letter. which I have hardly read— I write before morning post, to say, that I did not suppose you
would care to look at the movement in Drosera; (I am very
glad), else I would have told best way, viz to take Hairs lately inflected over
a fly, cut off, & put either dry or in water between glass, under high power (
Yours [illeg] | C. Darwin
- f1 2952.f1Dated by the relationship to the letters to Daniel Oliver, 14 October , 17 October , and 20 October , in which CD suggested experiments on Dionaea that Oliver might perform. The letter from Daniel Oliver, [before 23 October 1860], and the letter to Daniel Oliver, 23 [October] 1860, indicate that Oliver had not yet mentioned to CD that he intended to undertake such experiments. By the time that CD wrote the letter to Daniel Oliver, 3 November , CD knew that Oliver also intended to look for the `moving red matter' in the cells of Drosera rotundifolia (see n. 3, below).
- f2 2952.f2Oliver's letter has not been found.
- f3 2952.f3CD had asked Oliver to examine actively functioning cells of Dionaea muscipula in order to substantiate his descriptions of a process that appeared to be connected with the plant's metabolism. CD told Oliver about a similar process that he had first observed in leaves of Drosera rotundifolia. See letters to Daniel Oliver, 14 October , 17 October , and 20 October .