As prominent among the causes of chronic catarrh in a purely medical aspect it may be well to insist upon the ease with which this condition is sometimes brought about by the physician himself. A man with a weakened bladder may carry a pint or much more clear urine in his bladder constantly during many years as a residual deposit which his weakened bladder cannot throw off. Excess over the fixed residuum produces a desire to urinate, and the patient, mainly by voluntary contraction of the {129} abdominal walls, voids that excess. If now the physician finds this globular accumulation in the patient's belly, and in his zeal to do all that is possible forgets his caution, he may throw the patient first into an acute cystitis (if haply he escapes collapse), and then into chronic vesical catarrh--an affair perhaps of a lifetime. Surgeons have noticed, and especially Sir Henry Thompson has pointed out, that a dirty catheter may poison the urine and bring about a cystitis which otherwise might have been avoided; and observers from all time have noticed that the sudden entire evacuation of the contents of a bladder long accustomed to over-distension is in itself a grave cause of serious inflammatory disturbance to the mucous membrane of the bladder. Recently much attention has been called to this condition and its possible fatal termination by Sir Andrew Clarke, under the name of catheter fever. The deductions from a knowledge of these facts are obvious: they are--(1) always to thoroughly cleanse, and then to disinfect, a catheter on each occasion before its use; and (2) never to empty entirely at a first sitting a bladder which has been long habituated to over-distension; and when, finally, the bladder is emptied, always irrigate it with a disinfecting solution (borax) after each emptying. SYMPTOMS.--Chronic cystitis varies in grade, and its symptoms vary with the grade of the inflammatory process. There is probably no pain more intense than that endured by a man with severe general cystitis in its last stages, when the unceasing tenesmus wrings groans from his lips, the sweat from his body, doubles his frame in agony, and converts his facial expression into a distorted tragedy. The sight is pitiable and never to be forgotten. On the other hand, a man may continue about and at his work with a patient flabby bladder containing constantly more or less stringy mucus and ammoniacal urine, suffering little or no pain or tenesmus, and perhaps having no subjective symptoms except a slight sense of weight in his lower belly and a rather frequent desire to urinate.