RECORD: Darwin, C. R. n.d. [Worm notes: Francis Darwin's calculations]. CUL-DAR64.2.27. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 6.2021. 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.

1

Frank subtracts 1/16 of thickness from the 2 following layers.

Terrace .0961200 inch in thickness

1/16 = .0060075

15/15 = .0901125

Common

.1524 inch in thickness

.009525

.142875 = 15/16

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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 16 October, 2023