'Science in the service of mankind' Opening Address at the Eighth London International Youth Science Fortnight, organised by Worldfriends International Service for Youth in conjunction with the British Association, 27 July-10 August 1966. Includes: 2 sets of Blackett's manuscript notes for his address; correspondence re conference and address; programme of address - the opening ceremony at which Blackett delivered his addres, was chaired by the President, Sir Lawrence Bragg. 1966