RECORD: Darwin, C. R. n.d. All Mammals have something in common as warm blood & high cerebral. CUL-DAR205.5.163. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 1.2023. 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-DAR205.5 contains notes on the principle of divergence, transitional organs and instincts.
The brown crayon number '11' indicates that this document was filed by Darwin in his portfolio for the subject of Divergence.
[163]
All Mammals have something in common, as warm blood & high cerebral development mode of reproduction, aerial respiration — certain poisons common to all— &c &c, as contrasted with Reptiles.
Now [illeg] changes may be of two kinds, one which will favour increase of number of all Mammalia. in nat — and secondly such changes as tend increase & decrease not the total number, but the number of subdivisions, such as often repeated geographical at & climate changes &c &c. — changes of this latter kind tend to affect all kingdoms of nature almost equally.—
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 6 March, 2023