In a series of 116 German women in whom the operation of removing the ovaries was performed, Pfister usually noted briefly in what way the sexual impulse was affected by the operation ("Die Wirkung der Castration auf den Weiblichen Organismus," _Archiv für Gynäkologie_, 1898, p. 583). In 13 cases (all but 3 unmarried) the presence of sexual desire at any time was denied, and 2 of these expressed disgust of sexual matters. In 12 cases the point is left doubtful. In all the other cases sexual desire had once been present, and in 2 or 3 cases it was acknowledged to be so strong as to approach nymphomania. In about 30 of these (not including any in which it was previously very strong) it was extinguished by castration, in a few others it was diminished, and in the rest unaffected. Thus, when we exclude the 12 cases in which the point was not apparently investigated, and the 10 unmarried women, in whom it may have been latent or unavowed, we find that, of 94 married women, 91 women acknowledged the existence of sexual desire and only 3 denied it. Schröter, again in Germany, has investigated the manifestations of the sexual impulse among 402 insane women in the asylum at Eichberg in Rheingau. ("Wird bei jungen Unverheiratheten zur Zeit der Menstruation stärkere sexuelle Erregheit beobaehtet?" _Allgemeine Zeitschrift für Psychiatrie_, vol. lvi, 1899, pp. 321-333.) There is no reason to suppose that the insane represent a class of the community specially liable to sexual emotion, although its manifestations may become unrestrained and conspicuous under the influence of insanity; and at the same time, while the appearance of such manifestations is evidence of the aptitude for sexual emotions, their absence may be only due to disease, seclusion, or to an intact power of self-control.