Since the compilation of statistical data relating to the various activities of the hospitals for mental diseases in this country was definitely decided upon by the Association at its meeting in 1913, the membership of the Committee on Statistics has from time to time included the following:—Dr. Thomas W. Salmon, Medical Director, National Committee for Mental Hygiene; Dr. Owen Copp, Physician in Chief and Superintendent, Pennsylvania Hospital, Department for Nervous and Mental Diseases; Dr. E. Stanley Abbot, Medical Director, Public Charities Association of Pennsylvania; Dr. Henry A. Cotton, Medical Director, New Jersey State Hospital, Trenton; Dr. L. Vernon Briggs, Boston, former member of the Massachusetts State Board of Insanity; Dr. Adolf Meyer, Professor of Psychiatry, Johns Hopkins University; Dr. Albert M. Barrett, Professor of Psychiatry and Neurology, University of Michigan; Dr. George H. Kirby, Director of the Psychiatric Institute, New York City; Dr. Samuel T. Orton, Professor of Psychiatry and Director of the Psychopathic Hospital, University of Iowa; Dr. Frankwood E. Williams, Associate Medical Director, National Committee for Mental Hygiene; Dr. Elmer E. Southard, Director of the Massachusetts State Psychiatric Institute; Dr. C. Macfie Campbell, Director of the Boston Psychopathic Hospital, and the writer. Associated with the committee officially were: Dr. August Hoch, formerly Director of the Psychiatric Institute, New York; Dr. H. M. Pollock, Statistician of the New York State Hospital Commission; Miss Edith M. Furbush, Statistician of the National Committee for Mental Hygiene, and various others. The Association's classification of mental diseases at this time (1921) is as follows: