General correspondence regarding meetings, committees, reports, etc., of the International Council of Scientific Unions (I.C.S.U.), including the following items:

Royal Society report on the IX General Assembly, September 1961.

I.C.S.U. papers for the agenda, 1961.

I.C.S.U. financial statement for 1 November 1957 - 31 December 1958.

Agenda, papers and a report of the Royal Society on the VIII General Assembly, October 1958.

Report on the meeting of the Committee on Space Research, November 1958.

Papers for the General Assembly concerning the Committee on Contamination of Extra-Terrestrial Exploration, July 1958.

Correspondence between H. Spencer Jones and Dr W.J.G. Beynon concerning the 'Solar Eclipses and the Ionosphere' symposium, April 1955.

Correspondence with A.V. Hill concerning the I.C.S.U., January 1955.

Correspondence with P. Tardi regarding the International Latitude Service, December 1953.

Correspondence with J.F. Cox concerning the Royal Greenwich Observatory's photographic zenith tube, December 1953.

Report on the Commission on the Ionosphere, August 1952.

Report on the VI General Assembly, October 1952.

Report on the General Assembly, September 1949.

Revisions of I.C.S.U. statutes, May 1949.