The Psychopathic Hospital at the University of Michigan, the first of its kind on this continent, was established at Ann Arbor in 1906 as a direct result of the activities of Dr. William J. Herdman. The objects and purposes of the hospital were shown by the provision of the legislature for the appointment of "an experienced investigator in clinical psychiatry, who shall be placed in charge of the psychopathic ward, whose duty it shall be to conduct the clinical and pathological investigations therein; to direct the treatment of such patients as are inmates of the psychopathic ward; to guide and direct the work of clinical and pathological research in the several asylums of the state, and to instruct the students of the State University in diseases of the mind." It was thus an integral part of the hospital of the University of Michigan but fully coordinated with the state institutions. A subsequent act of the legislature changed its status to that of a "State hospital, specially equipped and administered for the care, observation and treatment of insanity and for persons who are afflicted mentally but are not insane." It also provided that a clinical pathological laboratory should be maintained for the benefit of the state hospitals. During a period of eleven years it admitted an average of 168.82 patients per year. Twenty-four per cent of these were voluntary cases. The psychoses represented were: manic-depressive insanity, twenty-four per cent; dementia praecox, seventeen per cent; paranoid conditions, two per cent; hysteria, seven per cent; psychopathic personality, two per cent; alcoholic psychoses, four per cent; morphine intoxication, one per cent; imbecility, two per cent; general paralysis, eight per cent; cerebral syphilis, one per cent; epilepsy, two per cent; senile psychoses, one per cent; cerebral arteriosclerosis, three per cent; unclassified conditions, five per cent; and not insane, two per cent. Seventy-four per cent of all the cases admitted were discharged after a residence of three months or less and eighty-two per cent after a residence of four months or less. Fourteen and eight-tenths per cent of all cases were discharged as recovered and 32.7 per cent as improved. Owing to the fact that it has only sixty-two beds at its disposal, the number of admissions is necessarily limited and cases are carefully selected.