BY ERSKINE MASON, M.D., Surgeon to Charity and the Roosevelt Hospitals, New York. The accompanying photograph represents the bladder of a man, aged about fifty, who died in Charity Hospital. The pa- tient was in a comatose state when he reached the hospital, and died eight hours after admission. Shortly before death, the house-surgeon introduced a catheter and drew off some bloody urine, which was strongly ammoniacal. No difficulty was encountered in passing the catheter, though blood flowed freely through the instrument, and passed from the urethra after withdrawal of the catheter. The autopsy, made thirty-six hours after death, revealed dis- ease of the heart, pericardium, kidneys, and bladder. The pericardium was greatly distended with serum, and its surfaces covered with recent lymph. The aorta, together with its valves, was the seat of atheroma. The bladder was hypertrophied, and contained several polypi, which were bloody and of a