RECORD: Darwin, C. R. [1878]. Peas / Secondary radicles. CUL-DAR209.5.141-142. (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-DAR209.5 contains materials for Darwin's book Movement in plants (1880).
141
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Peas Secondary Radicles
June 14th Secondary Radicles on above peas, young & short — tips of main radicle still in water. on Chimney Piece square of sand-paper & shell-lac 8° a.m. 11 radicles.
4° 35 (1) Pin 4 squares, 2 radicles bowed upwards opposed to gravity 15' 8°. 15' a.m same state
Temp 14
6. 45' a.m 72
4° 45 P.m 77°
10. 33. do
— 4° 35 (II Pins) 2 squares 1 greatly bowed upwards (15th 8° 15 1 do— 1 a little laterally
4°. 40'( III Pins) 3 squares, 1 bowed laterally (15' 8° 15' with tip bowed laterally, a second with tip bowed to card
4° 40' IV Pins 2 squares 1 bowed upwards (15th 8°. 15' same state
142
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Peas. Secondary Radicles
Jun 15th 9° 15' a.m. fixed square of sand-paper with shell-lac on 11 more fresh. radicles of 2d order.— square of various sizes.—
(1) Pin. 4°. 35 (-) 15 (=) 20 P.m 4 4 square 1 slightly upturned; other 3 no effect. (16th 8° 15' a.m none affected)
2 Pins 4. 35 P.m 2 square no effect (16' 8° 15 a:m none affected
(3) 4° 35. 5 square 1 a little upturned (16' 8° 15 a.m. do.)
(I think perhaps kept too hot on chimney Piece Temp generally 78°)
16th 5° P.m no change
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 27 January, 2026