RECORD: Darwin, C. R. 1881. [Earthworm research notes]. CUL-DAR63.64. 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.
64
[calculations and illeg words] both side of valley per 70 yards
[calculations]
Therefore one cube foot of fine earth flow down the 2 sides of a valley [3 words illeg] allowed [3 words illeg] to bottom, evey year for [2 words illeg] or 5 cube feet annually for every mile in length
[calculations]
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 7 July, 2025