Papers of Patrick Maynard Stuart Blackett Papers and correspondence of Nobel Prize-winning physicist Patrick Blackett. The papers are extensive, relating to almost every aspect of Blackett's career in science and public life. There are records of his work on particle disintegration, cosmic rays, astrophysics and magnetism in the form of laboratory notebooks, working papers, correspondence, lectures, publications and broadcasts. There is also documentation on his activities on various defence projects and as a member of government committees before, during and after the Second World War. Areas of particular interest include his wartime researches for all three services, including his post-war influence on the formulation of science policy within the Labour Party of Hugh Gaitskell and Harold Wilson, and his involvement in the affairs of developing countries, particularly India where he formed a friendship with Jawaharlal Nehru. There is biographical and personal material including large numbers of letters of congratulation received on the occasion of the various scientific and public awards and honours with which Blackett's achievements were recognised. Blackett's political interests are represented by material relating to the Association of Scientific Workers, Labour Party discussion groups on science and technology policy and the Ministry of Technology instituted after the Party's 1964 electoral victory. There are records of a wide range of science related interests, such as the history of science and technology, science, education and government, nuclear weapons and disarmament, and of his overseas activities including material relating specifically to India and that concerned with matters more generally affecting developing countries. The letters in PB/11 were donated by Professor AA Watson and relate to Blackett's discussion with Professor Nishina regarding what is now known as the muon. 1911-1975