CASE V.--J. J. M., aged 24 years, white male, is a well-built young man, whose family history is unknown owing to his refusal to give it. He was born at Chester, South Carolina, in 1885. Childhood and school life uneventful as far as is known. He was a bright scholar of ordinary intellectual attainments. His industrial career, which began early in life, was, according to his statements, normal. He admits, however, losing several positions on account of outbreaks of temper during which he had fights with other employees. He had several gonorrhœal infections, the first one at the age of fifteen; was infected with lues at a very early age. He used alcoholics to a certain extent, and admits having been intoxicated on numerous occasions. In 1906 he was struck on the head with a club by a policeman. Later in the same year he received an injury to the head during a street riot. Neither of these injuries was accompanied by any untoward symptoms. In 1907 or 1908 he was struck on the head by an overhead pump while riding on top of a car. Was unconscious for some time afterwards, later got up and walked unassisted to a nearby station, where he took a train to Cincinnati. There he was confined to a hospital for ten days, undergoing treatment for this injury. He left the hospital one day without being properly discharged; had no ill after effects from this injury. In the summer of 1909 he was arrested in Washington, in company with another fellow, for robbery. They were both released on bond. The patient, however, left the jurisdiction, and when the police went to a nearby city to arrest him he met them with a loaded pistol. After considerable effort he was finally subdued and arrested. His companion received a short term sentence, while the patient was committed to five years in the Leavenworth Penitentiary. At that time he was living on the earnings of a professional prostitute, to whom he claims he had been married for several years. From correspondence between him and this woman it appears that he fully sanctions her mode of life. Soon after his arrival at the prison the physician noted his excitable and irritable disposition, which became progressively aggravated, finally necessitating his transfer to the observation ward, on December 9, 1910, a little over a month after his imprisonment. The records of the observation ward of the Leavenworth Hospital show the following:--