By this is to be understood a hip bath: that used at Gräfenberg is a small flat tub about seventeen inches in diameter and twelve or thirteen inches deep; a common washing tub placed against the wall will answer the purpose. The water in this bath is seldom more than four to six inches deep, in which the patient sits with his feet resting on the ground. No rule can be laid down for the duration of this bath, as it is ordered from ten minutes to an hour, and longer, depending upon the effect it is intended to produce. It is sometimes prescribed three or four times a day. The sitting bath is of so much importance that where not prescribed the case is considered an exception to the ordinary rule of treatment. The sitting-bath cools and strengthens the viscera of the body, and by revulsion or derivation, draws the humours from the head, chest, and abdomen; relieves pain in the gums or face, and dissipates flatulency and cholic; and is of the utmost value to those who lead sedentary lives. The object of using so little water in this bath, the foot and a half bath, is, that reaction may be the sooner effected. The water is only changed in peculiar cases. The abdomen should be well rubbed whilst taking the bath, and exercise taken immediately after it, to bring on a reaction. Where there is any tendency of heat or blood to the head, a wet bandage in the shape of a turban should be put on the head immediately before sitting in the bath, and continued the whole time. In commencing the hydropathic treatment, or where the patient is low spirited or unwell, or in cases where reaction is slow, a tepid sitting bath of 62 deg. to 64 deg. is usually prescribed. If a patient takes this bath immediately after the rubbing-sheet, or the room in which he takes it is cold, he should be covered with a cloak or dry blanket. Sitting baths must not be taken just before going to bed, excepting under peculiar circumstances. In a case of asthma when the patient could hardly breathe, a tepid sitting bath relieved him effectually in fifteen minutes. In all cases of accidents to the head, evil consequences are averted by repeated sitting baths. Head-aches are also generally relieved by these baths, which shows to demonstration that the theory of cold water when applied to the extremities driving the blood to the head, is completely devoid of foundation. XIX.--EYE BATH. As a preservative to the eyes, they should be kept open in a basin of water for two or three minutes every morning, or oftener. Glasses may also be used of the form of the eye, with water in them. For weak eyes, they are applied two or three times a day for five minutes each time. Where great inflammation exists, water should be thrown with the hand into the eyes several times a day. XX.--HEAD BATH.