Correspondence from L.W. Hayes, J.T. Henderson, E. Herbays and F.J. Hewitt to Edward Appleton, 1931-1950

The material consists of:

Correspondence from L.W. Hayes to Edward Appleton, dated 1946;

Correspondence from J.T. Henderson to Edward Appleton, dated 1931;

Correspondence from E. Herbays to Edward Appleton, relating to the U.R.S.I. [Union Radio-Scientifique Internationale], and enclosing a letter on Japanese co-operation, dated 1950;

Correspondence from from F.J. Hewitt to Edward Appleton, containing information about Johannesburg, dated 1949.