agency for use in radiological training courses Was authorized. Loans} of cobalt 60 sources for similar purposes were authorized for State civil defense agencies in Washington, California, and Texas.. Instruments were also provided on loan to Program 22 of the Civil — Effects Group, at the current Nevada test operation. This program is sponsored by the FCDA and includes evaluation of radiological defense survey methods by means of actual field training exercises. Industrial Health Conference. In connection with the 1953 Natt Industrial Health Conference, held this year at Los Angeles, the Divifi of Biology and Medicine sponsored a one-day meeting on industrial hea problems of special interest in AEC operations. The range of subject discussed included radiation dosimetry, experimental studies of inha tion of radioactive dusts by animals, aspects of the industrial medi programs at Hanford and at ORNL, beryllium toxicity, the treatment o uid metal burns, and therapeutics on radiation injury. AEC and cont tor personnel were also well represented both by attendance and part pation in sessions of the American Association of Industrial Physici and of the American Industrial Hygiene Association. The radiation p tion section of the AIHA voted to continue its identity as a special; section of the ATHA and initiated plans for one or more sessions on¥ ation protection at next year's Industrial Health Conference. a Radiation Instrument Catalog. During April, 423 copies of thk 3rd Edition of the Radiation Instrument Catalog were distributed to AEC pffices, AEC operating contractors, other government agencies, and contributi ne the manufacturers. Invitations to submit information on new products f first supplement to the Catalog have been sent to 93 manufacturers radiation instrument equipment. (End of UNCLASSIFIED section.) General Tripartite Conference on Permissible Doses i. On 30-31 and April 1, 1953, the fourth Tripartite Conference on Permis Doses was held at Harriman, New York. Twenty-one delegates, includ ng five from the United Kingdom and four from Canada, were present. I general, out of this meeting arose a better understanding and agreeme between the participating countries than had previously been noted. It was possible to eliminate much of the confusion on standards of me urement which the three countries have been using and to confirm or s en standards in current use. It appeared that perhaps some of the Jstandards in use in this country are on the conservative side, such as permissible level for radon concentration in mines. ( section,) 35 ARCHIVES

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