At the Geneva Conference on the Peaceful Uses of Atomic Energy, from August 8 to 20, 1955, some 450 papers were read and discussed, and apparently a further 600 which were not read are to be included in the Proceedings. Any report such as this can necessarily only be a record of a few personal impressions, and those requiring more detailed information should refer to the Proceedings which are about to be published by the United Nations Organisation. Five of the 16 volumes are to deal with medical applications of isotopes, biological actions of radiations, biochemical and physiological studies, safety precautions and dosimetry. In the following report the numbers of the papers referred to are given in brackets.Practically all the applications of radioactive isotopes in medicine which were discussed at the Conference have been published previously in various clinical journals. However, owing to language difficulties and the inaccessibility of the relevant publications the greater part of the work done in the U.S.S.R. has not been generally available; there was consequently a not inconsiderable interest in what the Russians would have to say and to show.A paper on teletherapy devices was given by Dr. Brucer (179). This included figures relating to the economics of some 1360Co installations in operation in the U.S.A. It would appear that consideration is also being given to the production of small units using europium 152 and 154. Prof.