Papers on meetings of the Atomic Scientists' Association (ASA) Agendas, minutes and position papers for meetings of the ASA. Topics discussed include: a proposed meeting with the Federation of Atomic Scientists (USA); a drive to recruit more members of the ASA; collaboration between the ASA and The Home Office on Civil Defence; a conference held jointly with the Institute of Biology on 'Biological Hazards of Atomic Energy'; the secrecy of scientific work and a proposed letter to 'The Times' on the USSR and the USA's efforts to have a system of international control of atomic energy. Notes on the ASA conference with the Federation of American Atomic Scientists, give the subjects discussed as: the International Control of Atomic Energy; Niels Bohr's open letter to the United Nations; the Use and Misuse of Atomic Weapons; the Stockholm Peace Appeal; Security and Clearance Procedures and the International organization of Scientists 1948-1950