f the Kiss," in the previous volume.

[100] See, e.g., Art. "Erection," by Retterer, in Richet's _Dictionnaire
de Physiologie_, vol. v.

[101] Guibaut, _Traite Clinique des Maladies des Femmes_, p. 242. Adler
discusses the sexual secretions in women and their significance, _Die
Mangelhafte Geschlechtsempfindung des Weibes_, pp. 19-26.

[102] In some parts of the world this is further aided by artificial
means. Thus it is stated by Riedel (as quoted by Ploss and Bartels) that
in the Gorong Archipelago the bridegroom, before the first coitus, anoints
the bride's pudenda with an ointment containing opium, musk, etc. I have
been told of an English bride who was instructed by her mother to use a
candle for the same purpose.

[103] _Parthenologia_, pp. 302, et seq.

[104] The connection of this mucous flow with sexual emotion was discussed
early in the eighteenth century by Schurig in his _Gynaecologia_, pp. 8-11;
it is frequently passed over by more modern writers.

[105] The drawing is reproduced by Ploss and Bartels, _Das Weib_, vol. i,
Chapter XVII; many facts bearing on the ethnography of coitus are brought
together in this chapter.

[106] Onanoff (Paris Societe de Biologie, May 3, 1890) proposed the name
of bulbo-cavernous reflex for the smart contraction of the ischio-and
bulbo-cavernosus muscles (erector penis and accelerator urinae) produced by
mechanical excitation of the glans. This reflex is clinically elicited by
placing the index-finger of the left hand on the region of the bulb while
the right hand rapidly rubs the dorsal surface of the glands with the edge
of a piece of paper or lightly pinches the mucous membrane; a twitching of
the region of the bulb is then perceived. This reflex is always present in
healthy adult subjects and indicates the integrity of the physical
mechanism of detumescence. It has been described by Hughes. (C.H. Hughes,
"The Virile or Bulbo-cavernous Reflex," _Alienist and Neurologist_,
January, 1898.)

[107] Roubaud, _Traite de l'Impuissance_, 1855, p. 39.

[108] _Das Weib_, seventh edition, vol. i, p. 510.

[109] 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_.

[110] See, e.g., the experiments of Obici on this point, _Revista
Sperimentale di Freniatria_, 1903, pp. 689, et seq.

[111] Summarized in _Archives d'Anthropologie Criminel