The Annual Meeting of the Radiological Society of North America will be held in Cleveland, Ohio, Dec. 4 to 9, 1949. It gives me great pleasure to invite all the members of the Society, their families, guests, and all interested physicians to attend the meeting. This year for the first time our Society will use a large convention hall, the Cleveland Public Auditorium. This will provide ample room for all meetings. There will be adequate space for the large Scientific Exhibits and Commercial Exhibits which are being prepared. To meet the growing and popular demand for the Refresher Courses, more courses have been added and more space for each course has been provided. The general theme of the Scientific Program is to be the Diagnosis and Treatment of Cancer. Outstanding authorities on the various phases of cancer have been invited to address the meeting, so that a broad discussion of the subject will be presented. By presenting this type of program, the Society will substantially aid in the development of the movement for cancer control. Cleveland offers all the attractions of a large city. The cultural and educational institutions, the parks, and the entertainment facilities of Cleveland are among the finest. For the medical visitor, there are many points of interest. Among these the Cleveland Medical Library, housed in the beautiful Allen Memorial Library Building, contains the famous Marshall collection of herbals, the Nicolaus Pol collection of early medical writings, as well as the Howard Dittrick Museum of Historical Medicine. Nearby Western Reserve University Medical School and University Hospitals are well known, especially for research in cardiovascular surgery and respiratory disease. The Cleveland Health Museum is a pioneer in public health education. The Sarah Todd McBride Museum is located in the Cleveland Clinic Foundation Building. There are places of general interest, many of which will appeal to our lady visitors. Located in beautiful Wade Park area are the Cleveland Museum of Art, the Cleveland Garden Center, and Severance Hall, the home of the Cleveland Symphony Orchestra. Famous Nela Park, the institute of lighting research and the site of the “electric home of tomorrow,ɛ will be included in the ladies tour. Ample hotel facilities are available, but it will be well to make reservations as early as possible.