In many women, a few days or it may be a few hours only before every menstruation, changing manifestations of manifold disorders may recur. Among these may be mentioned, general excitement of the nervous system, notable alteration in the voice, strong inclination to sadness, tearfulness, erotic longings, great irritability and sensitiveness of the sensory system, drowsiness, flushings of the face, giddiness, swooning. The appetite is impaired, the breath has a disagreeable smell, the digestion is disturbed, there is a tendency to diarrhœa; the facial aspect may be altered, there are blue rings round the eyes, eruptions on the skin, tendency to sweating, palpitation and feeling of anxiety, and a sensation in the extremities as if they had been beaten. Local symptoms also occur: disturbances of the function of micturition, swelling of the breasts, pains and colics in the renal region, feeling of warmth in the genital organs, pruritus vulvæ, sensation of weight in the uterus, and a strong impulse toward coition. The secretions may be pathological, sometimes there are profuse sweats, sometimes profuse mucous or bilious diarrhœa, whilst the urine may either be very abundant, almost colorless, and nearly free from saline matter, or thick and overladen with phosphates and urates. _Schauta_ writes regarding the complex of menstrual phenomena which occur in normal menstruation: “In the process of menstruation, blood and sanguineous mucus find their way through a mucous canal, the normal calibre of which is merely a capillary fissure. If the flow is slow, without the formation of coagula, and if the passage through the cervix is free, very gentle contractions of the uterine muscle suffice on the whole, as the blood exudes into the cavity of the uterus, to expel it into the vagina. Without such contractions, menstruation is hardly conceivable. Physiologically, they are characterized by a bearing-down sensation, passing down toward the thighs, and by pains in the back. It is rarely, that no pain at all is experienced; there are some women, however, who affirm that in their case menstruation begins quite unexpectedly, and without the slightest warning; but it does not follow that contractions of the uterus do not occur in these women also during menstruation. * * * The local disturbances which occur as an accompaniment even of physiological menstruation are, a sensation of fulness and weight in the pelvis, and pains in the lower part of the back, and these probably all result from the uterine contractions. The general disturbances of a reflex nature consist of tenderness on pressure in the epigastrium, headaches, general sense of languor, irritability, and an inclination to shed tears. Among changes in the functions of remote organs may be mentioned, swelling of the breasts, of the vocal cords, and of the thyroid body, increased respiratory capacity shortly before menstruation followed by rapid decrease during the flow,