The Hospital Purchasing File, now in its twenty-fifth edition, is an excellent reference on hospital buying. It contains an alphabetical list of manufacturers and distributors, a directory of hospital products of more than 200 pages, and a group of twenty-one manufacturers' catalogs classified on a departmental or service basis. These groups include administrative, dietary and housekeeping services, laundry, building construction and maintenance, plant operating equipment, professional services and facilities pertaining to surgery, radiology, pathology, obstetrics, anesthesia, pharmacy and other departments. A further reference section contains equipment and supply lists for hospitals of fifty, one hundred and two hundred beds and other valuable information in the planning of hospital departments and services. The book is an excellent source of information and reference for those who are concerned with the services of supply, hospital operation and maintenance.