RECORD: Darwin, C. R. & Francis Darwin. [ny].03.21. Frank drawing of End of radicle. CUL-DAR209.5.78. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 5.2023. 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).
[78]
March 21 Frank
drawing of End of radicle, which made the track on the flat level bit of glass
[sketch]
Width of whi clean path on glass
= .45 mm to .60 mm
= .018 to .024 inches
Distance from tip to where the black begins
(AB) = .45 mm = .018 inch
From tip to where path or unblackened part on root begins = 1.2 mm = .047 inch
AB = .45 mm = Width of white path = .45 = 18
AC = 1.2 = .047 inch to .6 mm 24
120 = 4.7
.12 4.7
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 26 July, 2023