Going into our nuclear future, where radiation promises to be a ubiquitous companion, it's gratifying to know that we have as good and unobtrusive a chaperone as the film badge. I only wish she didn't put on airs. Her strong features are: (1) She is on the job; (2) she is paid for her work, so does not neglect it; (3) she is cold to her charge's pleas for freedom, and doesn't know how to keep a secret. People generally mistake her aim in life. They think she is there to tell when her charge has been ravished. What she is really there for, however, is to keep her charge demure, and to curb those innocent excursions into harmless flirting. You never know how far foolish youngsters will go. Quantitative Film Badge Measurements: Now it is true that the measured blackening of a film badge is a valuable datum in the scientific analysis of a radiation accident, and of aid for prognosis. It would be useful in the management of therapy for overexposure, too, if we knew better what is effective in ameliorating seve...