Nikita Khruschev and Marshal Bulganin with Soviet Atom expert Mr Ivor Kurchatov, bearded, in the centre of a group of officials and scientists at the Atomic resea Establishment here as they make a tour of inspection in the Chemical Engineering Radioactive Laboratory. The Russians stayed for some 4 and a half hours and had the chance to talk with British workers for the first time. They are in this country on a ten day visit. White protective garments are worn by all April 21st 1956 Harwell