RECORD: Darwin, C. R. [Brown-Séquard on the transmitted effect of an operation] (nd) CUL-DAR195.1.19 Transcribed by Kees Rookmaaker. (Darwin Online,

REVISION HISTORY: Transcribed by Kees Rookmaaker 4.2010, corrections and editing by John van Wyhe 11.2010. RN1

NOTE: Editorial symbols used in the transcription:
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Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin.


In M.S. on amputation of Head skin & Brain Dr Brown says that cutting the [illeg] sympathetic nerve of Head, says impaired [sensibility] & of sense of Hearing

thus looks as if some effective thing [2 words illeg], had been produced on eye & ear, locally as well as in brain; for the pupil contracts on one side of head, on which nerve wd [illeg], — But it also depends whether Hearing is composed only on one side
why do certain tame mules contract

[Mensoly] on touch. —

I might ask Dr Brown where to read — see p 6 M S [Corfu] Man & [illeg]

1 Charles-Édouard Brown-Séquard (1817-1894), a Mauritian physiologist and neurologist. This note was used in a footnote to the second edition of Descent, p. 60.

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Citation: John van Wyhe, editor. 2002-. The Complete Work of Charles Darwin Online. (

File last updated 2 July, 2012