Correspondence and papers relating to the Royal Society relations with the International Council of Scientific Unions (ICSU), current files contain:
a) British National Committee for Geodynamics (BNC Geodynamics) 8 files, 1970-1980
b) International Union of Geodesy and Geophysics (IUGG) 24 files, 1963-1980
c) International Union of Pure and Applied Chemistry (IUPAC) loose papers, 1980-1982
d) International Union of Radio Science (URSI) 6 files, 1968-1976
e) International Biological Programme (IBP) 4 files, 1970-1975 (but a much larger collection of IBP papers from the Society's modern records centre has been microfilmed between 2001-2005 and the originals destroyed because of their poor physical condition). The archive holds mateial relating to the International Geophysical Year (IGY), 1957-1958, particularly the establishment, administration and scientific results from the Royal Society Base at Halley Bay, Antarctica.
International Council of Scientific Unions