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 8° 45 am dried & touched again Temp. of Table 15 the
(1) 11°. 15' a.m —(17th 8° — I think both curved from)
18th 8° 30', whole tip blackened, though rather obliquely; no certain bending,
(19th thrown away & new radicle
(20th 8° 30' a little curved away) 21st 8° 40' certainly curved 22d 8° 15 60° from perpendicular) 23d 8° 90° from perpendicular 24th 9° now 35° (2) 40° above horizon, so has passed through 90° + 35° 40
12° - 51°1/2 Temp of Table
52° to 50' 2°
58° 51° 5 15
16th 8°30 52°
—11 55°
17th 49° 7°a.m. on chimney Piece Tmp 52° to 62° 18'
22d 62° so higher
(2) 11h 15. a.m.
(17th 8°, certainly a little curved from)
18° 8° 30 certainly curved from caustic
(19th 8° 30 do) (21' 8° 40' curved at almost right angles') 22d 8° 15. 69° from the perpendicular).
(23d whole root inclined tip at rt angle from lower part & from black mark (24th at right angles
(3) 11° 15' a.m. (17th 8° I think a trace) 18' 8° 30 whole tip blackened no curving
(19' 8°. 30— very slight curving) (20th 8° 30' decidedly curved) 21' 8° 40' greatly curved 22d do (24th 9° at right angles to inclined lower part
(4) 11°. 15' 17th 8° long unhealthy not curved. It (18th 18th 8° 30' now new) 19' 8° 30' straight touched again (20th 8° 30 straight). 21' 8° 45' touched again) 22d very little grown.) (23d whole root brownish diseased,—
(24th 9° whole root brown, not grown.) Diseased
(5) 11° 15' 17° 8° thin & monstrous not curved: (18th 8° 30 new) 19th 8° 30' slightly curved touched again) 20th 8° 30 decidedly curved almost at right angles) (21st 8° 45' do) (22d 8. 15. 78° from the perpendicular 23d 8° at right angles & pressed against seed. (24th 9° at right angles)
(6) 11°. 15 (17th 8° monstrous not curved, whole tip blackened (18' 8° 30' new) 19th 8° 30 curved to dark side, touched again (20th 8° 30' still curved to spot) 21' cause was grt triangle of skin rubbing against this side touched again) 22d 8° 15 bent at right angles. towards touched side.) 24th 9° at right angles to touched — whole root brownish. O
(7) 11°. 15' (17th 8° decidedly curved from mark) 18th. 8° 30' a little curved, but whole top blackened though obliquely (19th curved a little from black) 20th 8° 30' do) 21' 8° 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) 11° 30' (17th 8' curved from black) 18' 8° 45 slightly curved from mark) 20th 8°. 30' do slightly though decidedly) 21' 8° 50' no doubt about gentle curvature from mark, yet hardly bowed 23d 8° whole root brownish & grown very little (24th. 9° 15' quite rotten
(2) 11° 30' (17th 8° tip all blacked not curved) 18th 9° new) 20th 8° 30' perhaps a trace of curvature (21st 8° 50' tip decidedly curved from black mark) 22d 8° 30 tip 56° from perpendicular
(3) 11° 30' 16' 8° 45 am perhaps a little curved (17th 8° not curved ) 18th 9° perhaps curved) (19th 8° 45 decidedly curved from black) 20th 8° 30' at angle of 45° from black mark.) (21st 27° below above Horizon ie 63° from perpendicular 22d 8° 30 whole radicle almost horizontal— 23d 8° quite horizontal 24' 9° 15 do'
(4) 11°. 30 (17th 8° tip all blackened) 18th 9° new) 20th 8° 30' slightly curved) 21' 8° 50' whole root straight, but declined from black mark 25°below horizon from perpendicular —(23d 8° do) |
(5) 11° 30 16th 8° 45 perhaps a little curved (17th 8° tip all blackened) 18th 9° new) 19' 8°. 45' decidedly curved from black. (20th 8° 30' at about angle of 50' from black mark) 21st 9° a.m tip at about 4546°above below horizon from black mark or 44° from perpendicular —(22d 8° 30' 72° from the perpendicular 24th 9° 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) 9° a.m) 20th 8° 40' slight curvature) 21' 9° slight, but decided) 22d 8° 30' touched again 23' 8° a.m whole tip blackened, not curved (24th 9°. 30' do) (25th 8° am do)
(2) 9° am) (20' 8° 40' very slight curvature (21' 9° straight— touched again) 22d 8° 30' touched again 23d 8° whole tip blackened not curved (24th 9° 30' yet whole root greatly declined from black side &— extended almost horizontally doubtful effect, but I think must be effect
(3) 9° a.m (20th. 8° 40' slight yet clear curvature (21st 9° do) (23d. 8° do.) 24th 9° 30' do tip 25' 8° 15' plainly curved from black mark., 50° from the perpendicular
(4) 9°. am (20th 8° 40' conspicuous curvature) (21' 9° do) (22d 8° 30' nearly straight 23d 8° decided deflection from black mark, but whole radicle bent to one side 24' 9° 30' I think whole root curved from black mark— 25' 8° 62° from the perpendicular
(5) 9°.a.m. 20th 8° 40' slight curvature (21st 9° marked curvature —35° from the perpendicular (23d 8° distinct curvature from black mark..) 24th 9° 30' no doubt 50° from perpendicular (25th 8° 15 63° from the perpendicular
N.B. 25' 8°. 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