AFTER a tour lasting six and a half months, during which the Atomic Energy Exhibition, organised by the Atomic Scientists' Association, visited twenty-five of the main centres in England, Scotland and Wales, the exhibition came to a close on May 28. Efforts to secure an extension in Great Britain failed ; but the exhibition will continue its existence abroad. The Council of the Atomic Scientists' Association, as well as the Ministry of Supply and other owners of equipment, have agreed to lend the exhibits to the United Nations Educational, Scientific and Cultural Organisation and the Lebanese Government for incorporation in an exhibition at the Unesco Conference in Beirut in October. Later it will probably tour several countries in the Middle East and, possibly, various European countries. Although the administration of the tour is left to Unesco, the Atomic Scientists' Association will be closely connected with it, and the atomic energy part of the exhibition will be known as that of the British Atomic Scientists' Association.