The Medical Research Council's seventeenth annual report summarizes the medical uses of radium and radon at various research centers in England for the year 1938. The report provides an opportunity for cursory review of the investigations in experimental and clinical fields together with a rapid appraisal of the progress and results of the research. The clinical sections outline the technical methods in use at the various centers for treatment of cancer and include a number of the tables containing pertinent statistical data. A special section on teleradium therapy reports the progress and investigations of the use of the radium beam. Of particular interest is the use of large radium sources (10 Gm.) and parallel investigations of 200 kilovolt x-ray and 5 Gm. radium units.