Correspondence and related papers concerning magnetism, including the following material:

Correspondence concerning the variation of magnetic charts and records and requests for measurements of magnetic variation, 1947.

Correspondence concerning the 'New Zealand Pilot' magnetic observation spots and an extract from 'Nature' regarding 'Earth Currents in Short Submarine Cables', 1946.

Correspondence concerning the amendment of the 'Red Sea and Gulf of Aden Pilot', 1944.

Correspondence concerning the amendment of 'South American Pilot I', 1944.

Correspondence concerning stations in the Pacific Islands occupied by the Carnegie Institute of Washington, 1944.

Correspondence regarding 'Pacific Islands Pilot', vol. 2, 1944.

Digest of an account of the apparatus for recording rapid changes in the intensity of the Earth's magnetic field at Cheltenham, U.S.A, 1943

Correspondence concerning the position of the magnetic observation spot on Ireland Island, 1942.

List of the observation spots of the 'St Laurence Pilot', 1942.

Letters on the positions of the observation spots of the 'Mediterranean Pilot', vol. 5, 1942.

List of the Carnegie Land Stations occupied more than once, 1942.

List of the Carnegie Stations on the South American mainland, 1942.

Correspondence with the Compass Department regarding the magnetic survey of the British Isles, 1940.

Correspondence concerning amendments of the 'Newfoundland and Labrador Pilot', 1939.

Correspondence concerning amendments of the Carnegie Stations on the East African coast, 1939.

Correspondence regarding the 'Norway Pilot III' magnetic stations, 1939.

Correspondence regarding the 'West African Pilot' magnetic stations, 1939.

Correspondence concerning amendment of the 'Mediterranean Pilot', vol. 5, and the 'China Sea Pilot', vol. 5, 1937.

Correspondence with the Director of the Compass Department regarding a landing compass, 1937.