RECORD: Darwin, C. R. [1875-1880]. Draft leaf of Earthworms, p. 24, and Cross and self fertilisation, (fair copy) / pp. 167-8. LINSOC-DWC.2.20. (Cite as: John van Wyhe ed., 2002-. The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Catalogued, transcribed and edited by John van Wyhe 3.2026. RN1
NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with permission of the Linnean Society of London and William Huxley Darwin. LINSOC-DWC.2 consists of an album of draft leaves of Darwin's books, Earthworms, Insectivorous plants, Cross and self fertilisation, Expression, and Power of movement deposited by The Charles Darwin Trust.
This rough draft of Darwin's book on worms was transferred to the family scrap paper pile after creation of the fair copy, which is now in CUL-DAR24 & CUL-DAR25.
[20]
when we see them in a more startled easy ready excite or startled on one day than on another day, we attribute it to the state of the nervous system; & it is familiar to everyone that an animal feeding or otherwise equally occupied has is less ready aroused to conscious of sundry [illeg] any or danger, than at other times.— & by the facts given I can see no reason to doubt that the same consideration ought to be applied to worms; as the higher animals.— namely that the nervous system is less easily excited, so exert a sense of danger at some periods than of others, & that when occupied they pay less attention to external [illeg], than of other times.—
(Finally that [sentence largely illeg]
[20v]
322
maximum of 3 seeds in any one capsule. So that the crossed and self-fertilised pods capsules from the perfect flowers yielded seeds in the proportion of 100 to 65. Fifty-three capsules produced by the cleistogene flowers, contained on an average 4.1 seeds; so that these were the most productive of all; and the seeds themselves looked finer even than those from the crossed perfect flowers.
The seeds from the crossed perfect flowers and from the self-fertilised cleistogene flowers were allowed to germinate on sand; but unfortunately only two pairs germinated at the same time. These were planted on
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 14 March, 2026