psychologists have been and are performing duties widely varied in nature in numerous types of installations in the Army (10). In addition to assignments in army hospitals, clinical psychologists have recently been assigned to duty in Consultation Services (formerly designated as Mental Hygiene Units) (1) (2) (3) (4), AAF Redistribution Centers and Convalescent-Rehabilitation Centers (5), and ASF Rehabilitation Centers and Disciplinary Barracks (6) (9). Although their duties will vary in each type of installation, certain fundamental functions, such as testing and interviewing, will remain the same.General descriptions of the services of the clinical psychologist in army hospitals will be found in Layman (8), Seidenfeld (11) (12), and Stevens (13). The nature of the duties vary even among hospitals, depending upon a number of factors, including the type of hospital, whether station, regional, or general; its location, whether overseas or in the zone of the interior; the personnel and local practices in each hospital. In addition to these external factors, the psychologist's abilities and interests enter into the determination of the services which he will contribute.It is obvious that no two installations, even of the same general type, will present the same picture. However, basic functions will in general be the same. The present discussion is based primarily upon the experience of the writer in a station and a regional hospital. It is felt that this description will be of interest to psychologists outside the Army who are concerned with the development of clinical psychology, and to psychologists in the armed forces, whether or not at present engaged in clinical work, since the program is broad in nature, including most of the functions performed by clinical psychologists in any type of installation. Differences among installations consist of variations in emphasis upon and the extent of the main functions.A brief description of the organization at Fort Knox Regional Hospital is necessary before proceeding with a discussion of the place of the clinical psychologist. As in most hospitals, the neurospychiatric division forms a section of the medical service, and includes open and closed wards, staffed by neuropsychiatrists, nurses, and enlisted personnel, both ward attendants and psychiatric social workers or psychological assistants. The work of the * Appreciation is due Major E. W. Williams, M.C., Chief of the Neuropsychiatric Section Regional Hospital, Fort Knox, Kentucky, who organized the Neuropsychiatric Clinic described, selecting and training the enlisted personnel in psychiatric terminology, concepts and methods; and to Capt.