RECORD: Darwin, C. R. [1878]. Radicles hippocastanum / Horse-chesnuts. CUL-DAR209.5.114-115. (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).
114
Big Jar
Dec. 15. 1878 Aesculus Hippocastanum
Germinated in saw-dust— tips of radicles looked dry — rubbed house caustic with blotting paper & rubbed once— left for few minutes & then tips immersed in water. Jar with cork Lid & glass-Plate
16th 8º 45 am dried & touched again Temp. of Table 15 the
(1) 11º. 15' a.m —(17th 8º — I think both curved from)
18th 8º 30', whole tip blackened, though rather obliquely; no certain bending,
(19th thrown away & new radicle
(20th 8º 30' a little curved away) 21st 8º 40' certainly curved 22d 8º 15 60º from perpendicular) 23d 8º 90º from perpendicular 24th 9º now 35º (2) 40º above horizon, so has passed through 90º + 35º 40
12º - 51º1/2 Temp of Table
52º to 50' 2º
58º 51º 5 15
16th 8º30 52º
—11 55º
17th 49º 7ºa.m. on chimney Piece Tmp 52º to 62º 18'
22d 62º so higher
(2) 11h 15. a.m.
(17th 8º, certainly a little curved from)
18º 8º 30 certainly curved from caustic
(19th 8º 30 do) (21' 8º 40' curved at almost right angles') 22d 8º 15. 69º from the perpendicular).
(23d whole root inclined tip at rt angle from lower part & from black mark (24th at right angles
(3) 11º 15' a.m. (17th 8º I think a trace) 18' 8º 30 whole tip blackened no curving
(19' 8º. 30— very slight curving) (20th 8º 30' decidedly curved) 21' 8º 40' greatly curved 22d do (24th 9º at right angles to inclined lower part
(4) 11º. 15' 17th 8º long unhealthy not curved. It (18th 18th 8º 30' now new) 19' 8º 30' straight touched again (20th 8º 30 straight). 21' 8º 45' touched again) 22d very little grown.) (23d whole root brownish diseased,—
(24th 9º whole root brown, not grown.) Diseased
(5) 11º 15' 17º 8º thin & monstrous not curved: (18th 8º 30 new) 19th 8º 30' slightly curved touched again) 20th 8º 30 decidedly curved almost at right angles) (21st 8º 45' do) (22d 8. 15. 78º from the perpendicular 23d 8º at right angles & pressed against seed. (24th 9º at right angles)
(6) 11º. 15 (17th 8º monstrous not curved, whole tip blackened (18' 8º 30' new) 19th 8º 30 curved to dark side, touched again (20th 8º 30' still curved to spot) 21' cause was grt triangle of skin rubbing against this side touched again) 22d 8º 15 bent at right angles. towards touched side.) 24th 9º at right angles to touched — whole root brownish. O
(7) 11º. 15' (17th 8º decidedly curved from mark) 18th. 8º 30' a little curved, but whole top blackened though obliquely (19th curved a little from black) 20th 8º 30' do) 21' 8º 45 whole radicle oblique, independently of mark, & now straight — 22d whole radicle nearly Horizontal— —23d— bowed down & cracked \
114v
Aesculus (see other side)
Retouched on 16th
see other side
Jar with glass-stopper
15th
(1) 11º 30' (17th 8' curved from black) 18' 8º 45 slightly curved from mark) 20th 8º. 30' do slightly though decidedly) 21' 8º 50' no doubt about gentle curvature from mark, yet hardly bowed 23d 8º whole root brownish & grown very little (24th. 9º 15' quite rotten
(2) 11º 30' (17th 8º tip all blacked not curved) 18th 9º new) 20th 8º 30' perhaps a trace of curvature (21st 8º 50' tip decidedly curved from black mark) 22d 8º 30 tip 56º from perpendicular
(3) 11º 30' 16' 8º 45 am perhaps a little curved (17th 8º not curved ) 18th 9º perhaps curved) (19th 8º 45 decidedly curved from black) 20th 8º 30' at angle of 45º from black mark.) (21st 27º below above Horizon ie 63º from perpendicular 22d 8º 30 whole radicle almost horizontal— 23d 8º quite horizontal 24' 9º 15 do'
(4) 11º. 30 (17th 8º tip all blackened) 18th 9º new) 20th 8º 30' slightly curved) 21' 8º 50' whole root straight, but declined from black mark 25ºbelow horizon from perpendicular —(23d 8º do) |
(5) 11º 30 16th 8º 45 perhaps a little curved (17th 8º tip all blackened) 18th 9º new) 19' 8º. 45' decidedly curved from black. (20th 8º 30' at about angle of 50' from black mark) 21st 9º a.m tip at about 4546ºabove below horizon from black mark or 44º from perpendicular —(22d 8º 30' 72º from the perpendicular 24th 9º 30 do
(11 cases)
90 (-) 34 (=) 56
90 (-) 18 (=) 72
115
(2
Jar M. Horse-chesnuts. (New narrow jar) dry radicles
Dec. 19th 1878.— Lunar-caustic (one touch.) dry caustic.
(1) 9º a.m) 20th 8º 40' slight curvature) 21' 9º slight, but decided) 22d 8º 30' touched again 23' 8º a.m whole tip blackened, not curved (24th 9º. 30' do) (25th 8º am do)
(2) 9º am) (20' 8º 40' very slight curvature (21' 9º straight— touched again) 22d 8º 30' touched again 23d 8º whole tip blackened not curved (24th 9º 30' yet whole root greatly declined from black side &— extended almost horizontally doubtful effect, but I think must be effect
(3) 9º a.m (20th. 8º 40' slight yet clear curvature (21st 9º do) (23d. 8º do.) 24th 9º 30' do tip 25' 8º 15' plainly curved from black mark., 50º from the perpendicular
(4) 9º. am (20th 8º 40' conspicuous curvature) (21' 9º do) (22d 8º 30' nearly straight 23d 8º decided deflection from black mark, but whole radicle bent to one side 24' 9º 30' I think whole root curved from black mark— 25' 8º 62º from the perpendicular
(5) 9º.a.m. 20th 8º 40' slight curvature (21st 9º marked curvature —35º from the perpendicular (23d 8º distinct curvature from black mark..) 24th 9º 30' no doubt 50º from perpendicular (25th 8º 15 63º from the perpendicular
N.B. 25' 8º. 15. It is very striking when one looks from vertically above on the 5 se radicles— which are all extended sub-horizontally not one vertically down look irregularly acted on, the little black mark is in every case directly above on upper side In some cases in this & other jars a slight furrow is left above the black mark— showing injury
Certainly 4/5 of them acted on & 1 doubtfully
55/35
90 (-) 37 (=) 63
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 27 January, 2026