RECORD: Darwin, C. R. [1864].08.23. Kidney beans. CUL-DAR157.1.6. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 4.2023. RN1

NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here.

The volumes CUL-DAR157.1-2 contain notes, abstracts etc. for Darwin's long paper and later book Climbing plants (1865). It was also commercially available as a softbound offprint, F834, F834a. See R. B. Freeman's bibliographical introduction. Items CUL-DAR157.1.11-60 were in a folder marked "Twiners". Items CUL-DAR157.1.61-112 were in a folder marked "Leaf-climbers" and items CUL-DAR157.1.114-147 were in a folder marked "Tendrils". Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin.


[6]

Aug 23. Red line straight on internode, after it had would round stick, & internode was pulled straight, the red line was straight. It was just the same when I wound an old internode by force round, letting the apex be free. But if I hold apex firmly as long, then the stem was twisted; which proves that stem as it twists naturally rotates on its own axis.— The spontaneous twisting takes place without twining — When slip of paper wound round it cannot twist on its own axis for flatness, The natural twisting of apex is in reverse direction to that in which it winds round stem — When pulled off stick straighten itself when wound & so does garters when wound round stick —

(Kidney Beans)

[6v]

When a H raises up several some yards of rib. up a distance, he does not wind it in a single coil, for if he did so the ribbon would become twisted as many times round itself as there are coils; but he winds it as a figure of eight finger on his thumb & of little finger so that he alternately take make a turn circle in opposite direction, & thus the ribbon is stra not twisted. So it is with tendrils, with the sole difference, that they take several turns in one direction & than several the same number in the opposite direction; but in both cases self-twisting is equally avoided.


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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 18 July, 2023