RECORD: Darwin, Emma. 1872. [Earthworm research notes]. CUL-DAR63.81-82 Edited by John van Wyhe (The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Prepared and edited by John van Wyhe 7.2025. 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 volumes CUL-DAR63, CUL-DAR64 and CUL-DAR65 contain a diverse array of materials for Darwin's research on earthworms. All of the textual items in these folders, including this one, have been transcribed in a single file: CUL-DAR63-65.


81

Knole Oct 22. 1872 Worms

After several wet days & much rain last night, almost all the recent castings have subsided; & those on the steep slopes even where covered with coarse grass, have manifestly flowed a little downwards. This was manifest from the shape of the smooth, flattened, conical heap, & was proved in some cases in which I found the orifice. These castings had a larger diameter down the slope than transversely. Mem. dry pellet during dry seasons, wind, insects, birds &c. There must be some carrying down, the sole question is, whether enough to produce any desirable effect.—

82

Worms

Oct 23d / 72/

3)

Knole — There is artificial bank, behind Rifle largest in Park, the sides of which slope at angle of about 45° or 50°. One side (N) covered with thick, long coarse grass, but worms bring their castings to surface. There & others on opposite side had flowered much down; & other older ones were crumbling & rolling down. There can be no doubt that a steep turf around trenches wd in the course of several centuries become gully [illeg] & slope [illeg] by action of worms.

Oct. 24th — Observed innumerable subsided castings, to effect of rain before the 22d, & there exhibited no trace of the external vermiform structure. This last was very conspicuous, as the worms had found through bored & had made first castings on the summit — when a casting has subsided in that more like so much water, no evidence is requisite that when on a slope. even a gentle slope, there must be no flowing down. — nevertheless give evidence.—


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

File last updated 7 July, 2025