THE British X-Ray and Radium Protection Com mittee has recently issued a fourth revised report. It includes recommendations on the working hours for whole-time X-ray and radium workers. In addition to formulating precautions that should be observed by these workers, the report also deals with the safe use and storage of inflammable films, the safe use of electromedical apparatus, and precautions to be observed in the application of ultra-violet treatment and to ensure proper dosage. The Pro tection Committee will welcome suggestions or in formation which might tend to improve its scheme of protection outlined. Copies of the report may be had on application to the Secretaries, 32 Welbeck Street, W.I, or to the Director, National Physical Laboratory, Teddington, Middlesex.