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 7° 45' P.m. Oscillating. — 16° to 17° from end

 —do 15°— — 16°?8 45. 

9.58 14°

 oscillating 12 10. 45

20th 7° 5 a.m at end of scale & on near side

retrograde to 20°

}

 8° oscillating? & starting strongly on nearly on same spot

Temp 51 1/2° F.

8° 12' warm infusion of R. meat made ½ close with petiole

8 17' at the 20°

8. 50. (-) 17 (=) 33 on the 35° so has closed considerably — set it again at 20° not oscillating more.—

9° 5. moved only 1/500 of inch. ie to 21°

[diagram]

10.10.

25°—26°

10 55

27°

11 50

30° jerks about rather above 1/1000

12.52

bowing

1. 50

32°

??

34° —still jerking — Temp 56°

4. 5

35°

5

36°

7. 25'

39°— set at 1° again, by moving Pot.— ie has moved 19/500 since 10° 25'

10.50

8° from end

21

7°a.m.

off scale in same direction put on 1°

7.50.

14° — moving quicker — jerking — spikes almost interlocking

8. 53

— 30°

9. 37

42° — reset at 1°

10.20'

— 14°

11.35

38° — move to 1°— still jerking fully 1/1000 & in 2 directions at right angle

12.48

1.48.

gone back — 1 ie to right-Hand — set at 20°

169v

[proof sheet of Forms of flowers]

169b

Feb 19th 7° 50' (1) 8° 5' glass filament— on spike next to Paper

 8° 35. now 30 degrees from end— so moved 10°??\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.— ) 

9° The leaf in closing now

9° 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

11° 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 53°)

11. 54' ? strongly nearly 1/500— still abut same spot

12. 48. has moved 1° from window apparent apparently to left

2. 13 still jumping abut same spot 20°—21°

— 54° F do do. do. do ?2—46 

 19° do ?4. 15  & this implies opening

4. 40' 18° 1/2.—

5. 25 17½

 

(1)

10

20

30

170

Feb. 21

23? 2° 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

3° more infusion— on 20° division

4° Spikes nearly interlock placed in 20° again

20° — on ?4° 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

8° 40' still twitching —still on the 20°

10. 50 same place, pot moved rather further from window—

now placed Black point on further edge of the 20°

 

Feb. 22d 7° same spot but further from window apparent

9° move almost 1° to right & from window (apparent) & still jerking Temp. 51°

11°40 gone to 15° 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

11° 40' set at 20°

2°. 30 19° & just below scale on near side

7° 25. 15° some little way on the scale.

10. 45 12° & well on scale

23d 7° am 9° & above scale (i.e non-window— or lobes falling down & leaf lobes opening

  8. 55— 1° & considerably above scale— put back to 20° upper end of Scale still jerking.— Temp 51°. F.

2° on the 20° but nearer window on above scale

— set it again on upper edge of scale do 4°— still on 20°— but do

7°. 30. 19°— not so hi above scale or to window

10. 45 P.m— still nearer window— set again at 20° on top of scale

24th 17° 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