RECORD: Darwin, C. R. n.d. [breadth of earth measurements] [Earthworm research notes]. CUL-DAR64.2.15. 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.

These measurements are cited in Earthworms, p. 169.

15

Cubic inches

30.64

211.44

3064

9

27576

30.64 / 211.44 (69008

18384

27600

27576

2400

160th

= 1/6.9008 = about 1/7 of original

(Used)

(Exterior knowledge of breadth of Earth)

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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 24 July, 2025