Adler, who has studied masturbation in women with more care than any previous writer, has recorded in detail the auto-erotic manifestations involved in the case of an intelligent and unprejudiced woman, aged 30, who had begun masturbating when twenty, and practiced it at intervals of a few weeks. She experienced the desire for sexual gratification under the following circumstances: (1) spontaneously, directly before or after menstruation; (2) as a method to cure sleeplessness; (3) after washing the parts with warm (but not cold) water; (4) after erotic dreams; (5) quite suddenly, without definite cause. The phenomena of the masturbatory process fell into two stages: (1) incomplete excitement, (2) the highest pleasurable gratification. It only took place in the evening, or at night, and a special position was necessary, with the right knee bent, and the right foot against the knee of the extended left leg. The bent index and middle fingers of the right hand were then applied firmly to the lower third of the left labium minus, which was rubbed against the underlying parts. At this stage, the manifestations sometimes stopped, either from an effort of self-control or from fatigue of the arm. There was no emission of mucus, or general perspiration, but some degree of satisfaction and of fatigue, followed by sleep. If, however, the manipulation was continued, the second stage was reached, and the middle finger sank into the vagina, while the index finger remained on the labium, the rest of the hand holding and compressing the whole of the vulva, from pubes to anus, against the symphysis, with a backwards and forwards movement, the left hand also being frequently used to support and assist the right. The parts now gave a mushroom-like feeling to the touch, and in a few seconds, or after a longer interval, the complete feeling of pleasurable satisfaction was attained. At the same moment there was (but only after she had had experience of coitus) an involuntary elevation of the pelvis, together with emission of mucus, making the hand wet, this mucus having an odor, and being quite distinct from the ordinary odorless mucus of the vagina; at the same time, the finger in the vagina felt slight contractions of the whole vaginal wall. The climax of sexual pleasure lasted a few seconds, with its concomitant vaginal contractions, then slowly subsided with a feeling of general well-being, the finger at the same time slipping out of the vagina, and she was left in a state of general perspiration, and sleep would immediately follow; when this was not the case, she was frequently conscious of some degree of sensibility in the sacrum, lasting for several hours, and especially felt when sitting. When masturbation was the result of an erotic dream (which occurred but seldom), the first