RECORD: Darwin, C. R. [1874-1875]. Draft of Insectivorous plants, folio 21. BL-Zweig.141. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 11.2022. RN1
NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with permission of the British Library and William Huxley Darwin.
The text of the draft corresponds with Insectivorous plants, p. 413: "The best plan would have been to puncture the bladders, but I did not think of this till too late, excepting in a few cases. In all such trials, however, it cannot be ascertained positively that the bladder, though translucent, does not contain some minute animal in the last stage of decay. Therefore most of my experiments were made by cutting bladders longitudinally into two; the quadrifids were examined with No. 8 of Hartnack, then irrigated, whilst under the covering glass, with a few drops of the fluid under trial, kept in a damp chamber, and re-examined after stated intervals of time with the same power as before."
[21]
(21
[in margin, in the hand of G. H. Darwin:] Portion of the rough draft of Insectivorous Plants by Charles Darwin G.H.D
xx/628
Utricularia
that the best plan would have been to puncture the bladders, but I did not think of this till too late. In all such trials, however, it is scarcely possible to be certain that the bladder, though highly translucent, has not already captured some minute animals. Therefore most of my experiment were therefore made by cutting a few bladders longitudinally into two holl holes ; & [text excised] after examining carefully the quadrifids carefully with nor 8 of Hartnack [text excised] with under the covering glass with a few drops of the flaccid [text excised] character. I
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 9 October, 2023