RECORD: Darwin, C. R. [1878].01.13-14. Red Cabbage. CUL-DAR209.8.47-48. 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).


[47]

Jan 13/

Red Cabbages

Put on quill-pipes .3 deep on 2 seedlings & 2 other painted ones on 2 other & exposed to S.W window from 11° 30' to 4° 30 used the drop of gum to prevent then slipping down for they were loose.

Four Seedlings well curved to light.

The 2 with whole quills very slightly curved, hardly at at one with black upright — the other fairly well curved to light— — So failures — quills not transparent enough & those I used too large

Failures Probably no use—

Failure Heliotropism

Quills painted & unpainted

(8

Jan 14th -78/

Red Cabbage Seedlings.

Folded round strips .3 deep of probably transparent gold-beater skin one fold deep & stuck edge together with saliva —3 plants— & 3 other similar ones afterwards painted over with oil —& Lamp black

Heliotropism

This looks like [illeg] — but older experiments failed

Not painted

No 22. as much curved as any; curvature extends down to within .17 of ground. Height of plant to top of Cots, not fully expanded 1.15

No 19. moderately curved as much as any of the taller neighbour.— Height of plant 1.05

No. 3 well curved as much as neighbours down to within .3 of ground Height of plant 1.2

Painted

No 4. just perceptibly curved towards light; cotyledons looking upwards instead of as in all free plants to light. Height of Plant 1.05

No 21. exactly as No 4 — Height 1.2

No 23 do do 1.35

Marked contrast between these 3 & all the free ones & those with transparent gold-beaters skin.


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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 25 September, 2022