Of the 402 women, 166 were married and 236 unmarried. Schröter divided them into four groups: (1) those below 20; (2) those between 20 and 30; (3) those between 30 and 40; (4) those from 40 to the menopause. The patients included persons from the lowest class of the population, and only about a quarter of them could fairly be regarded as curable. Thus the manifestations of sexuality were diminished, for with advance of mental disease sexual manifestations cease to appear. Schröter only counted those cases in which the sexual manifestations were decided and fairly constant at the menstrual epoch; if not visibly manifested, sexual feeling was not taken into account. Sexual phenomena accompanied the entry of the menstrual epoch in 141 cases: i.e., in 20 (or in the proportion of 72 per cent.) of the first group, consisting entirely of unmarried women; in 33 (or 28 per cent.) of the second group; in 55 (or 35 per cent.) of the third group; and in 33 (or 33 per cent.) of the fourth group. It was found that 181 patients showed no sexual phenomena at any time, while 80 showed sexual phenomena frequently between the menstrual epochs, but only in a slight degree, and not at all during the period. At all ages sexual manifestations were more prevalent among the unmarried than among the married, though this difference became regularly and progressively less with increase in age. Schröter inclines to think that sexual excitement is commoner among insane women belonging to the lower social classes than in those belonging to the better classes. Among 184 women in a private asylum, only 13 (6.13 per cent.) showed very marked and constant excitement at menstrual periods. He points out, however, that this may be due to a greater ability to restrain the manifestations of feeling. There is some interest in Schröter's results, though they cannot be put on a line with inquiries made among the sane; they only represent the prevalence of the grossest and strongest sexual manifestations when freed from the restraints of sanity.