Note AQ — Chapter XIV · EROS, LIBIDO, JEALOUSY

The experiments of Waldstein and Elder show that every congressio, ending in the male ejaculation within the vagina, causes a certain saturation of the female blood with a substance, owing its origin within the male body, and exercises a certain change in the female blood. These authors have shown by experiments on rabbits (Archiv für Kriminalanthropologie und Kriminalistik, Vol. 56, p. 364) that the male sperma within the female organism represents a foreign body in the sense of Abderhalden. When the sperma has entered the blood of the female organism it produces there a specific ferment. The blood of a rabbit, twenty-four hours after copulation, possesses the quality of dialyzation upon testicular tissue. This reaction is positive after every copulation, no matter whether fertilization has taken place or not. Thus a part of the male circulates within the blood of the female, even after copulation without fertilization.