RECORD: Darwin, C. R. CUL-DAR209.3.169-170. (John van Wyhe ed., 2002-. The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Prepared and edited by John van Wyhe. 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-DAR209.3 contains materials on Circumnutation of leaves and hyponasty for Darwin's book Movement in plants (1880).
169
19th 7º 45' P.m. Oscillating. — 16º to 17º from end
—do 15º— — 16º?8 45.
9.58 14º
oscillating 12 10. 45
20th 7º 5 a.m at end of scale & on near side
retrograde to 20º
}
8º oscillating? & starting strongly on nearly on same spot
Temp 51 1/2º F.
8º 12' warm infusion of R. meat made ½ close with petiole
8 17' at the 20º
8. 50. (-) 17 (=) 33 on the 35º so has closed considerably — set it again at 20º not oscillating more.—
9º 5. moved only 1/500 of inch. ie to 21º
[diagram]
10.10.
25º—26º
10 55
27º
11 50
30º jerks about rather above 1/1000
12.52
bowing
1. 50
32º
3º
??
34º —still jerking — Temp 56º
4. 5
35º
5
36º
7. 25'
39º— set at 1º again, by moving Pot.— ie has moved 19/500 since 10º 25'
10.50
8º from end
21
7ºa.m.
off scale in same direction put on 1º
7.50.
14º — moving quicker — jerking — spikes almost interlocking
8. 53
— 30º
9. 37
42º — reset at 1º
10.20'
— 14º
11.35
38º — move to 1º— still jerking fully 1/1000 & in 2 directions at right angle
12.48
6º
1.48.
gone back — 1 ie to right-Hand — set at 20º
169v
[proof sheet of Forms of flowers]
169b
Feb 19th 7º 50' (1) 8º 5' glass filament— on spike next to Paper
8º 35. now 30 degrees from end— so moved 10º??\500
oscillating (Petiole not secured)
N.B Movement best described endless little jerks in all possible directions, ie to all sides side— but with preponderance in one direction.— (Very old leaf formerly observed.) ( —Do not speak of ellipses this inaccurate.— )
9º The leaf in closing now
9º 20' Petiole must be nearly close or chiefly
Used
"twitching" gives impression of Hard Work
10. 25. cemented short Petiole on summit of Stick
& put apex of filament on 20th degree
11º 9' had moved considerably retrograded to the 20th deg
11. 14 is oscillating nearly 1/500 of inch
11. 14 retrograded scale obliquely on the 20th — The
lobes must be moving up & down, descending closing & shutting
11. 35 oscillating abut same spot —(Temp 54½ F 53º)
11. 54' ? strongly nearly 1/500— still abut same spot
12. 48. has moved 1º from window apparent apparently to left
2. 13 still jumping abut same spot 20º—21º
— 54º F do do. do. do ?2—46
19º do ?4. 15 & this implies opening
4. 40' 18º 1/2.—
5. 25 17½
(1)
10
20
30
170
Feb. 21
23? 2º 35 d (ie has move 3 to left Hand & former
old course, but is moving apparently to window — this may be due to pressure of inter crossing spikes
3º more infusion— on 20º division
4º Spikes nearly interlock placed in 20º again
20º — on ?4º 30. again still closing — great jerking
on 20 It?7. 25. now has lately moved apparently from window
& this implies that closed blade are rising
8º 40' still twitching —still on the 20º
10. 50 same place, pot moved rather further from window—
now placed Black point on further edge of the 20º
Feb. 22d 7º same spot but further from window apparent
9º move almost 1º to right & from window (apparent) & still jerking Temp. 51º
11º40 gone to 15º so opened a little— still jerking about 1/1000.
the 2 blade on half basal part — completely closed cut off of paper, as perhaps interfered with closure
11º 40' set at 20º
2º. 30 19º & just below scale on near side
7º 25. 15º some little way on the scale.
10. 45 12º & well on scale
23d 7º am 9º & above scale (i.e non-window— or lobes falling down & leaf lobes opening
8. 55— 1º & considerably above scale— put back to 20º upper end of Scale still jerking.— Temp 51º. F.
2º on the 20º but nearer window on above scale
— set it again on upper edge of scale do 4º— still on 20º— but do
7º. 30. 19º— not so hi above scale or to window
10. 45 P.m— still nearer window— set again at 20º on top of scale
24th 17º near window
170v
[proof sheet of Forms of flowers]
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 29 January, 2026