During this period he was also active in many other organisations, including secretary of the Royal Society's council (1929-1938); president of the Physical Society (1924-1926); founder fellow of the Institute of Physics in 1920 (and later its president); and a governor of the Imperial Institute (1930–1938). In 1938 Smith accepted a post as scientific adviser to Anglo Iranian Oil (later British Petroleum). He also worked in association with the Birmingham Small Arms Company, at first as an unofficial adviser, but in 1944 as chairman of the research committee. In 1947 he became a director, and resigned in 1957 on his eighty-first birthday. Family Smith married Nelly May King in 1902. They had one daughter, Betty May born in 1909. She married John H Fry in 1936, and died on 20 December 1990. Lady Nelly May Smith died at Minehead Hospital on 30 August 1961. Sir Fank Edward Smith died on 1 July 1970 at Blenheim Lodge Nursing Home, Minehead. The Royal Society's memoir on Smith notes “… a curious incident. Between the issue of Who's Who for 1936 and that for 1937 the record of his birthday was changed to three years later, i.e. to 14 October 1879. His birth certificate at the Record Office, Somerset House and all the earlier records are consistent in giving his birthday as 14 October 1876. This change may have been a type-setter’s up-turning of a ‘6’ to a ‘9’ which Smith probably did not at first notice [...]. Later on in his life he began to adopt the changed date.” Even more curiously, the dates of birth for Smith, his wife and his daughter are all shown in the 1939 England and Wales Register as 3 or 4 years later than the true dates. Honours and awards 1899 ARCS, 1st class 1918 OBE 1918 FRS 1922 CBE 1925 Hughes Medal of the Royal Society 1926 CB 1926 Hon DSc University of Oxford 1927 Duddell Medal of the Physical Society 1930 Hon LLD University of Birmingham 1931 Hon LLD University of Aberdeen 1931 KCB 1934 Faraday Medal by the Institution of Electrical Engineers 1934 Gustav Canet Medal of the Junior Institution of Engineers 1936 Hon DSc University of Sheffield 1936 Charles Parsons Memorial Medal of North East Coast Engineers and Shipbuilders 1937 Fellow, Imperial College London 1938 Honorary Fellow, Institution of Civil Engineers 1938 Honorary Fellow, Institute of Physics 1939 GBE 1942 GCB 1947