RECORD: Darwin, C. R. & Francis Darwin. [1879].07.17. Cobœa Scandens. CUL-DAR209.11.211. 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-DAR209.11 contains material for Darwin's book Movement in plants (1880).


[211]

(Concluding chapter)

[211v]

Cobœa Scandens Würzburg July 17

Tendril young but capable of catching hold movements traced on bell glass by "line"-ing the tip of the tendril with its base. The movement was about at right angles to the light, but being in a green house the light was not very unilateral. The back wall ran east & west & then tendril pointed South

3.40 pm to 4.50 pm an irre ellipse three times as long as broad

(a) 4.50 to 5.7 an irregular ellipse in a different direction

(a) (b) 5.7 to 5.17 ─ one small zig zag about 1/5th or 1/4th of the size of the full sweep of the tendril

(b) 5.19 to 5.26 another ditto ─ the

It then started off on the big sweep making another still smaller loop c just after starting, it went to the These 3 smaller loops or zigzag are at the east end of the sweep. At the W end it made one small & & one very large zig zag e which spoilt the ellipse & the tendril got back to the E end 6° 6'. From 6 to 7 another large ellipse made

Rough sketch of tracing on bell glass [sketch]


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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 23 August, 2023