G. D—, æt. 69, admitted September 21st, 1896, for the eighth time. He was maniacal on admission, and had remained so for twelve months.

In January, 1898, he commenced to complain of pain on micturition; his urine was strongly alkaline and contained pus. He stated that two months previously he had inserted a piece of vulcanite pipe stem into his urethra. On passing a sound no foreign body was detected in the urethra, but a stone was felt in the bladder.