A permanent committee on statistics has been maintained by the Association since 1913. The following statistical tables were officially adopted some years ago and are now in general use: 1. General information; 2. Financial statement; 3. Movement of patients; 4. Nativity and parentage of first admissions; 5. Citizenship of first admissions; 6. Psychoses of first admissions, types as well as principal psychoses to be designated; 7. Race of first admissions classified with reference to principal psychoses; 8. Age of first admissions classified with reference to principal psychoses; 9. Degree of education of first admissions classified with reference to principal psychoses; 10. Environment of first admissions classified with reference to principal psychoses; 11. Economic condition of first admissions classified with reference to principal psychoses; 12. Use of alcohol by first admissions classified with reference to principal psychoses; 13. Marital condition of first admissions classified with reference to principal psychoses; 14. Psychoses of readmissions, types as well as principal psychoses to be designated; 15. Discharges of patients classified with reference to principal psychoses and condition on discharge; 16. Causes of death of patients classified with reference to principal psychoses; 17. Age of patients at time of death classified with reference to principal psychoses; 18. Duration of hospital life of patients dying in hospital, classified with reference to principal psychoses. An elaborate statistical manual fully explaining the use of these tables has been furnished to the psychiatric hospitals of the country by the Association. Since this work has been undertaken the full cooperation of the institutions of the following states has been assured: Alabama, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin and Wyoming, and the District of Columbia. Practically every state hospital in the United States is now officially represented in this important movement. The success of this undertaking has been largely due to the active cooperation of the National Committee for Mental Hygiene through its Bureau of Statistics. It should receive the enthusiastic support of all who are interested in the future progress of modern psychiatry. CHAPTER XIV THE CLASSIFICATION OF MENTAL DISEASES