=Treatment.=--The treatment of acute cystitis consists in rest--preferably on the back, with the legs drawn up, in bed. The diet should be chiefly fluid, as milk and pure water, flaxseed tea, or mineral waters. Potassium citrate, fifteen grains, and sweet spirit of nitre, fifteen drops, may be given in water to advantage three times daily. Hot full baths or sitz baths two or three times a day, and in women hot vaginal douches (that is, injections into the front passage), with hot poultices or the hot-water bag over the lower part of the abdomen, will serve to relieve the suffering. If, however, the pain and frequency attending urination is considerable, nothing is so efficient as a suppository containing one-quarter grain each of morphine sulphate and belladonna extract, which should be introduced into the bowel and repeated once in three hours if necessary. This treatment should be employed only under the advice of a physician. In chronic cystitis, urotropin in five-grain doses dissolved in a glass of water and taken four times daily often affords great relief, but these cases demand careful study by a physician to determine their cause, and often local treatment. Avoidance of all source of irritation is also essential in these cases, as sexual excitement and the use of alcohol and spices. The diet should consist chiefly of cereals and vegetables, with an abundance of milk and water. The bowels should be kept loose by means of hot rectal injections in acute cystitis. =RETENTION, STOPPAGE, OR SUPPRESSION OF URINE.=--Retention refers to that condition where the urine has been accumulating in the bladder for a considerable time--over twelve hours--and cannot be passed. It may follow an obstruction from disease, to which is added temporary swelling and nervous contraction of some part of the urinary passage; or it may be due to spasm and closure of the outlet from nervous irritation, as in the cases of injuries and surgical operations in the vicinity of the sexual organs, the rectum, or in other parts of the body. Overdistention of the bladder from failure to pass water for a long time may lead to a condition where urination becomes an impossibility. Various general diseases, as severe fevers, and conditions of unconsciousness, and other disorders of the nervous system, are frequently accompanied by retention of urine. In retention of urine there is often an escape of a little urine from time to time, and not necessarily entire absence of outflow.