RECORD: Darwin, C. R. & Francis Darwin. [1877].10.11 Marsilea / Proof sheet of Forms of flowers, p. 63, published p. 123. CUL-DAR209.14.45-46. (John van Wyhe ed., 2002-. The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and John van Wyhe, edited by John van Wyhe 7.2023. RN2
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-DAR209.14 contains material for Darwin's book Movement in plants (1880).
[45-46]
Oct 11 in HotHouse
vertical
1 8. 48 AM
2 9
3 9. 3
9. 8
9. 12
9. 17 5
9. 20 7
9. 25
9. 28 9
9. 40
9. 58
10. 7
10.52 13
11. 15 14
11. 34
12. 4
1. 0
18 1.38
2. 32 19
3. 10 20
Marsilea
Oct 11 Sunny day
Marsilea placed in position in the hot case the day before, & on the 11th only very slight twist of pot & the stalk of leaf made more vertical stalk of leaf tied (close to leaf) to lead wire. Index is a fine spun bit of glass; the observations made by foreshortening with no second paper mark —
Plant in The index points away from light Temperature 28º in AM 22ºC in Pm.
The vertical displacement of tip of leaf magnified at least 16 times. Length of leaf 15mm
[Between] 9º 30' & 3.30 3 ellipses vertical ie in 6º
[46]
[Proof sheet of Forms of flowers, p. 63, published p. 123.]
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 4 February, 2026