Correspondence between W.J.G. Beynon and Edward Appleton, dated 1955. The material relates to U.R.S.I. [Union Radio-Scientifique Internationale] and M.C.I. [Mixed Commission on the Ionosphere] affairs, organisation of I.G.Y. [International Geophysical Year] and arrangements for the meeting in the U.S.A. in 1957. It includes and offprint of an article on I.G.Y. by Appleton from The Times, 17 January.