RECORD: Darwin, C. R. n.d. Again Knight's remark about excess of food causing variation. CUL-DAR45.65. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 10.2022. RN1
NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with permission of the Syndics of Cambridge University Library William Huxley Darwin. The volume CUL-DAR45 contains notes for Natural selection chap. 4 'Variation under nature'.
[65]
Again Knights remark about excess of food causing variation.—
It wd agree admirably with my views that flourishing tribes varied most.
Hence a single Tropical species, ranging from its limit does not give rise new groups of species
Even Herberts remark that species with very confined ranges vary improve more, seems to agree rather with confined ranges being plants under unfavorable conditions.— So again starved varieties being more fixed. ie less variable again comes in.—
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 20 October, 2022