RECORD: Darwin, C. R. 1868.04.27. I have been watching Mr H. laughing intensely. CUL-DAR195.4.18. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 6.2022. RN1
NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin. The volume CUL-DAR195 contains materials for Darwin's book Expression of the emotions (1872) organised roughly as: DAR195.1 blushing. DAR195.2 astonishment, fear. DAR195.3 indignation, rage, screaming, etc. DAR195.4 laughter, frowning, introduction.
The Huxleys stayed at Down House from 18 April to 4 May 1868. (Emma Darwin's diary. CUL-DAR242)
[18]
I have been watching Mr H. laughing intensely & jaws move vy little, certainly do not quiver like monkeys ─
Also watched geo yawning & supposing, the platysma (or buccinator) acted most & draw back corner of mouth; I think it was platysma, for ch said she felt the movement on side of chest ─ I often have cramp om side of neck when yawning
April 27/68/
[in margin in pencil:] Platysma also acts when mouth open jaw vy wide
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 25 September, 2022