Correspondence regarding magnetism, including the following items:

Correspondence regarding the airborne magnetic observations made prior to 1952, 1953.

Correspondence regarding magnetic declination records, 1953.

Correspondence regarding magnetic observations taken between Norway and Greenland, 1953.

Lists of sites in Labrador suitable for magnetic observations (Battle Harbour, Hopedale and Hebron), 1953

Minutes of a meeting on magnetic variation held at 22 Archway Block, South London, on 24 July 1952.

Correspondence regarding the Danish Oceanographic Expedition, 1950.

Correspondence concerning the proposed International Institute for Geomagnetism, 1949.

Correspondence between C.E. Jarman and the Astronomer Royal regarding the magnetic re-survey of the United Kingdom, 1949.

Correspondence regarding observations of magnetic variation made by ships, 1948.

Copy of P.M.S. Blackett's fundamental theory of the Earth's magnetism, 1947.

General statement on the work of the Associate Committee on Geodesy and Geophysics sponsored by the National Research Council of Canada, 1947.