RECORD: Darwin, C. R. n.d. Beans / differential sensitiveness of radicles. CUL-DAR209.5.98. (John van Wyhe ed., 2002-. The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Prepared and edited by John van Wyhe. 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-DAR209.5 contains materials for Darwin's book Movement in plants (1880).

98

Used for Differential sensitiveness of radicle of Bean

Thickness of thin paper = .045 mm = .00175 inch

Sand-paper      = between .15 & .20 mm

            = between .0059 & .0079 inch

Thick Bristle which acted sometimes = .33 mm = .013 inch

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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 27 January, 2026