RECORD: Darwin, C. R. 1879.06.15-07.09. Nankin Cotton. CUL-DAR209.9.15. 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 volume CUL-DAR209.9 contains materials for Darwin's book Movement in plants (1880).


[page] [15]

Nankin Cotton Cotyledons

Jun 15' 10° P.m. 1879

2 seedlings with cots at noon & now al horizontal — length of a cot .65 of inch.

Jun 23d 10° P.m. same 2 seedlings

one (1) with Cots 60° & 65° beneath horizon & were horizontal at noon; length of blade 1.1 inch

(2) with Cots 70° beneath Horizon; length of Cots 1.3 inch—

Petioles curved downwards.— A very little true leaf now formed

It is clear that as with Ipomœa the bowing down of Cots. occurs only after grown large

25th 10. 30' P.m Cotyledons similarly depressed— first true leaf .9 of inch in extreme length no at horizontal as at noon

July 9th Cots now very old, large & beginning to wither, but at 10° P.m almost vertically down & at noon nearly Horizontal (over)

[page] [15v]

July 8th 1879 Plants now 6 & 7 1/2 inches high with 2 or 3 leaves developed— these at 10° 15' P.m vertical or 6' 8° or 70° beneath the Horizon.

(The Cotyledons very old & vertical & withering)

Blade of vertical leaf 2 inches long that of the 70° leaf 1 inch long. At noon on previous day Cots Leaves horizontal —

On 9th at 9° a.m. in study leaves almost horizontal except the biggest which still depends much.

12° 15' in Hothouse all leaves including biggest one nearly Horizontal

Plant clearly sleeps.—


Return to homepage

Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)

File last updated 25 September, 2022