RECORD: Darwin, C. R. n.d. Castings from the Terrace. [Earthworm research notes]. CUL-DAR64.2.13. Edited by John van Wyhe (The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed 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 volume CUL-DAR64 contains research materials for Earthworms.
13
Castings from the Terrace
(Terrace artificially heated not fair)
72 fluid ounces to be commited with cubical trenches
124.773 = 124 3/4 nearly *
3lb 8oz (or 3.5lb) annually per square yard: what weight in F[illeg] annually in acre? [remainder not in Darwin's hand:] 7.5625 tons = 7 1/2 tons
* .09612 of which spread over square yard [therefore] it wd take 10 1/3 years to raise the surface one inch
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 24 July, 2025