Das Weib, seventh edition, vol. i, p. 510.
The influence of impeded respiration in exciting more or less perverted forms of sexual gratification has been discussed in a section of "Love and Pain" in the third volume of these Studies.
See, e.g., the experiments of Obici on this point, Revista Sperimentale di Freniatria, 1903, pp. 689, et seq.
Summarized in Archives d'Anthropologie Criminelle, March, 1903, p. 188. The tendency to closure of the eyes noted by Roubaud, to avoid contact of the light, indicates dilatation of the pupils, for which we need not seek other explanation than the general tendency of all peripheral stimulation, according to Schiff's law, to produce such dilatation.