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 28° in AM 22°C in Pm.
The vertical displacement of tip of leaf magnified at least 16 times. Length of leaf 15mm
[Between] 9° 30' & 3.30 3 ellipses vertical ie in 6°
[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 21 December, 2025