“In a third period, prostitution no longer fills the place of a traditional survival, but is a morbid manifestation confined to a certain class of the community. But bridging this transition of prostitution from a normal to a morbid manifestation, we have the remarkable phenomenon of æsthetic prostitution. Thus, in India and in Japan, an agreeable class of prostitutes practices the arts of singing and dancing, and forms a privileged caste; similarly, in the most flourishing period of Grecian culture, the leading men of the time formed a social circle around the hetairæ, from whom they derived a fruitful stimulus to intellectual and political activity. In this respect, history repeated itself in Italy in the sixteenth century. Alike in classical Greece and in mediæval Italy, this æsthetic prostitution fanned the flames of a period of intense spiritual activity—for in individuals as in races, intellectual quickening is ever accompanied by erotic excitability.” The unbridled passion of the primitive races of mankind, the coercive love of beauty felt by the ancient Greeks, the swelling flood of erotism of the great mass of people of all times, is gradually guided into the quiet channel of the marriage bed; and even though monogamic marriage is incapable of fully providing for all manifestations of sexual passion, still, from the medical point of view, we must maintain that marriage is for women the most hygienic and the most proper means of gratification of the sexual impulse. _Conception._ The union between ovum and spermatozoön, whereby fertilization is effected, appears to occur in the human species as a rule in the outer third of the Fallopian tube, the ampulla of this structure (_receptaculum seminis_ in _Henle’s_ terminology) serving to store the semen for a considerable period; in the lower animals, the usual occurrence of fertilization in this region has been established by direct observation. The open mouth of the tube receives the mature ovum, guided thither from the ovary by appropriate movements of the ovarian fimbriae; these movements have been seen in active occurrence in the guinea pig by _Hensen_. Once within the tube, the onward movement of the ovum is effected by the cilia of the epithelium lining of the canal.