RECORD: Darwin, C. R. 1878.07.23-28. Veg Marrow. CUL-DAR209.5.119-122. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 5.2023. 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).


4

July 23d —1878

Veg. marrow Jar C

23d. 4° 50' P.m placed germinating radicles half immersed in water on study Table, but now (24th 8° 50') had hardly grown, so poured away some water & left in damp air on Study Table.

4° 45' grown very little fixed sq. on 3 R.s 25' 8° 30' no effect

25' 8° 30' fixed sqr with asphalt or shell-lac. on all under hour grown better— 5° P.m these look much better than other lots— several are inclined from sqr, but tips not abruptly curved from them— These grow mostly in direction opposed to Sachs curvature & therefore great contrast to former lot— see under what condition raised— Might be curious to investigate whether temperature or immersion at first in water does not modify Sachs curvature

26th 8° 30' several are curiously inclined from card— I do not know what to think. — (26' 4° 45 put on card in opposition to existing curvature & marked with pin 2 radicles— 27th 10° 45' one perhaps has acted, the other not at all— The evidence from this jar altogether doubtful

5

July 23 / 1878.

Veg. Marrow Jar B

23d 4° 50' P.m fixed with shell-lac. sqr. on 6 Radicles in air on sand-bath. (24th 8°. 30' had grown greatly; no effect. sq. dropped off 4 of them— fixed on the 4 oth dropped ones. sq. with asphalt.— The Radicle grow strongly to Sachs.

4° 30' P.m. no effect.

25' 8° a.m no effect— now immersed Radicle in water

— 4° 45. cards all washed off. — not possible to fix them with asphalt or shell-lac.— 4° 50 fixed with shell-lac. sqr on sqr 6 secondary roots & exposed to damp air on sand-Bath

26' 8° 20' out of the 6, 2 have decided bend some way down, in direction from sq.— & tip does not touch sq. in another case & in another case sq. too Heavy to lift— 8° 50' fixed on some more small sq. but they are so flexible they bend with weight— 26' 4° 40' P.m no effect

27' 10° 40' a.m.— One is slightly kinked, as ought to occur from square

6

July 23d. 1878

Veg. marrow. Jar B A

23d 4° 50' put several germinating seeds half immersed in water on sand Bath, but radicles (24th 8° 30') had hardly grown & what little had grown had curved abruptly to Sachs; so now left in damp air on sand Bath, but I fixed sq. with asphalt on 2 of the best. (4° 40' forgot & shook jar one washed off)

25' 8° a.m. no effect— Rad have hardly grown at all Immersed Rad in water on sand-Bath here (5° P.m. look wretched will not grow)

28' 8° 30' a.m. do. do.)

After they have grown a good deal: then try immersion in water.

7

Veg. Marrow. Egg-shaped Var Great Jars

1878

July 24th 9° a.m pinned several seed on cover & left in damp air on sand-bath. 4° 40' fixed with asphalt sq. on 3 R

25 8° 30 have grown very badly, hardly at all — Left on Study Table sq. dropped off 2— 1 perhaps affected by sqr

25. 5° P.m. The main radicles have never developed— I suppose too hot but the secondary ones are now developing.

26' 8° 40' a.m fixed small sq with shell-lac on 8 secondary radicles— main (& on 1 other main radicle— others grow miserably: 4°. 50' no effect

27th 10° 45' no evidence of action on secondary roots

25' 5° Pinned 2 Sultan Gourds on cover. Sickly


Return to homepage

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

File last updated 26 July, 2023