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

??

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

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]

 


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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 29 January, 2026