RECORD: Darwin, C. R. n.d. Cabbage / Draft of Descent, vol. 2. CUL-DAR209.8.60. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 7.2022. 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 volumes CUL-DAR209.7-8 contain notes on heliotropism (phototropism) for Darwin's book Movement in plants (1880).


(1

Cabbage Blackened Box S W. window

Gold-Beaters skin— Painted Indian Ink

p. 1. upper half of Hypocotyl

1 X

2 X

3 X} quite vertical

(4) bowed at right angles to Light

The basal par half of painted & unpainted carefully compared & very different.

Height of seedlings not given must have been young

Unpainted Exposure 7° 30

1

2} as much bowed as any

3} & become vertical during night

Holes on this side (add to those with holes on one side) Lateral

Unpainted curved almost to ground—

Exposure 7° (exposed like yesterday) (Abstract)

p. 2.

(5) X same spec. as yesterday reversed

(6) X do. vertical do. do. do

(7) covering not half way down very slightly bowed

(8) covering rather short (?) curved to light} had unpainted skin yesterday

(9) X vertical

10 (8) X vertical — had narrow stripe at rt ∠ in Black Box this did not act Lateral

11 (9) covering only 1/3 down considerably curved to light Lateral stripe 68° from window

omit (12) very tall — covering not [ over] 1/3 1/2 way down slightly inclined to light

p. 3 (13) X vertical or trace of flexure

Holes─ 14 well curved, but whole reticulation of Holes on Light side

15 — Doubtful — slightly curved to light — rather too old

16 X vertical Lateral (Blackened Box S.W. window) expose 7° 30'

17 very slightly curved to light Lateral 61° Blacken Box

p. 4) 4 cases of Holes in gold-beaters skin Lateral

p 5. 1 (18) X exposed for 20 1/2 Hr quite young seedlings about .45

2 (19) X do Paraffin Lamp. do vertical} free ones curvature goes down to sand quite prostrate

3 (20) X do do do do do Height not 1/2 are .45 inch

4 (21)X do do

(22) X do do do

(23) slightly inclined— & holes on side

Much bent given in detail

Table seedlings (SW window 7° 15')

p. 7 .3 deep 1.17 height well curved

Painted 1.6 well curved

Add 1 from p. 2.

✓ 1.0 vy slight curved

1: slightly curved

1.3 moderately curved

tall moderately curved

44

p. 8. ✓ 1.05 just perceptibly curved ✓ 1.2 do 8 seedlings ✓ 1.35 do} marked contrast with free seedling

Unpainted

(1) well curved (2) moderately 3 well 4 well curved 5 well curved 6 well curved} Tall

p. 8 7 well curved 8 9 .3 deep} Tall Plants

(41

Ch 17 18

males when rutting horn great battles on the ice; & their roaring "is said to be sometimes so loud as to be heard that it can as to be heard from miles off." When attacked by men they are said to roar or bellow; & whenever irritated the bladder is inflated. Some [illeg] believe that the voice is thus strengthened by the bladder; but various other explanations have been suggested for their use uses for of the bladder have been suggested; & Mr. R. Brown believes that it is an organ of defence against any kind of danger. This latter view is not probable, if what the sealers now say, & formerly have long said according to Pennant, is correct, namely that neither the females nor the young of either sex have possess the hood or bladder is remains in a rudimentary condition in the female & undeveloped in the males whilst young. in the young of both sexes. But in regard to the female females former, Mr Brown does not think that there are just grounds for the beliefs the statement) (8)*(32)

Foot-note

[Descent 2: 278: "The males when rutting fight furiously on the ice, and their roaring "is said to be sometimes so loud as to be heard four miles off." When attacked by man they likewise roar or bellow; and whenever irritated the bladder is inflated. Some naturalists believe that the voice is thus strengthened, but various other uses have been assigned to this extraordinary structure. Mr. R. Brown thinks that it serves as a protection against accidents of all kinds. This latter view is not probable, if what the sealers have long maintained is correct, namely, that the hood or bladder is very poorly developed in the females and in the males whilst young.8
8 On the sea-elephant, see an article by Lesson, in 'Dict. Class. Hist. Nat.' tom. xiii. p. 418. For the Cystophora or Stemmatopus, see Dr. Dekay, 'Annals of Lyceum of Nat. Hist. New York,' vol. i. 1824, p. 94. Pennant has also collected information from the sealers on this animal. The fullest account is given by Mr. Brown, who doubts about the rudimentary condition of the bladder in the female, in 'Proc. Zoolog. Soc.' 1868, p. 435."]


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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 26 September, 2022