Papers of Sir Francis (Franz) Eugen Simon Correspondence, articles and working papers of Sir Francis (Franz) Eugen Simon, physicist and FRS. The scientific notebooks in the collection date from 1919-1934, largely the period of Simon's researches on low temperature physics at the Physikalisch-Chemisches Institut of Berlin University, and subsequently at Breslau. The the collection also includes files of lectures, articles, cuttings and souvenirs, including photographs. Other notes and manuscripts for lectures and articles are post 1930, by which time Simon had moved to Oxford. The largest group of papers are the correspondence files from the years 1922-1956, which provide a full account of Simon's dealings with many fellow scientists and scientific organisations. Individual letter files include correspondence with VM Goldsmidt FRS (1888-1947), Max Born FRS (1882-1970), Gwyn Owain Jones (b.1917), DKC MacDonald FRS (1920-1963) and Nevill Mott FRS (b.1905) among many other notable figures. Simon's professional appointments as head of the Clarendon Laboratory and as science correspondent to the 'Financial Times' are represented by substantial groups of letters. Details of Simon's involvement in atomic energy development are to be found in papers on uranium isotope separation (MAUD Committee notes) and UK Atomic Energy Authority correspondence. Two later additions to the collection consist of correspondence and files highlighting Simon's contacts with industrial firms, universities and international organisations. 1906-1956