[175] Paul, F. T., Lancet, 1910, ii. 294.

[176] Haneborg, Acta Medica Scandinavica, 1921, Supplement I. p. 117.

[177] Bell, Lancet, 1922, i. 715.

[178] MacNider, Science, 1917, xlvi. 643.

[179] Rappleye, Boston Med. and Surg. Journ., 1918, clxxviii. 191.

[180] A Discourse Of The Preservation Of The Sight: Of Melancholic Diseases: Of Rheums and Of Old Age, composed by M. Andreas Laurentius, Ordinarie Phisition to the King and Publike Professor of Phisicke in the Universitie of Montpelier. Translated out of the French into English according to the last Edition by Richard Surphlet, Practitioner in Phisicke, p. 170, London, 1599.

[181] Aub and Dubois, Arch. Int. Med., Chicago, 1917, xix. 823.

[182] Gray, A. A., Diseases of the Ear, p. 335, 1910.

[183] The Gray Room, p. 261, 1922.

[184] Rivers, W. H. R., Instinct and the Unconscious, p. 148, 2nd edition, Cambridge University Press, 1922.