a INTERNATIONAL ACTIVITIES Toone UNCLASSIBIED* 7 Extensive and complimentary news coverage was given to the United States exhibit, which was attended by morethan 83,000. An operating low-power research and training reactor proved to be the most popular item in the exhibit. The United States won a prize cup for having the best exhibit at the exposition. Topical Conferences Under the AEC’s program of financial support for international conferences on special scientific subjects relating to atomic energy, aid was given to the Symposium on Health Physics in Biology and Medicine held in Puerto Rico under the auspices of the University of Puerto Rico, May 26-28, Second International Conference on the Peaceful Uses of Atomic Energy, 1958 (o Details of United States preparation for the International Conference on the Peaceful Uses of Atomic Energy to be held in Geneva, Switzerland, September 1—13, will be found in the Commission’s Twenty-fourth Semiannual Report to the Congress. Trend of conference preparations. The worldwide trend of preparations for the 1958 Conference as reported by the United Nations is clearly in the direction of broader, more complete, ‘and more elaborate participation by more countries. The United Nations announced that on May 2 it had received 2,325 abstracts of papers from all nations, compared with 1,070 for the 1955 conference. Of the 45 countries and four intergovernmental agencies submitting abstracts, the smaller nations showed the greatest increases, Mexico and Hungary, which submitted no papers in 1955, submitted 5 and 28 abstracts, respectively. Yugoslavia increased its submission from 7 to 56 and West Germany from 2 to 65. The United States total of 831 abstracts submitted by April 22 had been increased to 910 by the middle of June. The numberof abstracts submitted by May 2 by other leading nations, as reported by the United Nations, were: ppt United Kingdom U.S.S.R. France Belgium 199 189 162 West Germany India Yugoslavia Sweden Ttaly . 69 : 65 63 56 51 47 : Summary of United States preparations. Preparations by the United States have more than kept pace with the increased efforts of other nations. United States participation in the 1958 conference is expected to be greater than in 1955 in many respects, as indicated in the following table: 1958 Numberof abstracts received and processed by AEC review committees . Number of papers submitted to the United Nations for oral presentation or publication in the proceedings Films prepared by the United States for show- YS ing by the United Nations UNCLASSIFIED 1955 1,499 1,067 700 391 17 8 DOE ARCHIVES Desrtmentof Erg