The Complete Work of Charles Darwin Online

RECORD: Darwin, C. R. & Francis Darwin. n.d. Donders (New Sydenham Soc vol XXII p 574. CUL-DAR53.1.B38. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with the permission of the Syndics of Cambridge University Library and William Huxley Darwin. The volume CUL-DAR53.1 contains notes, photographs, and drawings for Darwin's book The expression of the emotions.

B38

Donders (New Sydenham Soc vol XXII p 574 to the effect that the contraction of the pupil in accommodation is what may be called and unconscious voluntary movement. The accommodative movement is .... to be considered voluntary. It is true, we contract our pupil without being conscious of the contraction of muscular fibres, but this holds good for every voluntary movement

Reference:

Donders, Frans Cornelis. 1864. On the anomalies of accommodation and refraction of the eye. W. D. Moore, trans. London: The New Sydenham Society. CUL-DAR.LIB.154 PDF

Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)