Reports on the Tolerance Doses Panel and Carriage of Radioactive Isotopes Contains two reports: "Negotiations with British Railways on carriage of Radioactive Isotopes" by the Atomic Energy Research Establishment, and; Progress Report from the Tolerance Doses Panel for the period October 1948 to January 1949. Also includes a covering note from the Protection Sub-Committee enclosing the two reports. Jan 1949 - Feb 1949