Correspondence with the Meteorological Office and other papers regarding meteorological studies and related subjects, including the following items:

Correspondence with the Air Ministry Meteorological Research Committee, 1946.

Notes on a proposed method of estimating temperature at high altitudes by measuring the time sound takes to travel between an explosion point in the air and the Earth's surface, 1946.

Suggested method for using long-range projectiles for the investigation, at radio frequencies, of atmospheric refractive index, with particular reference to the measurement of electron density in the ionosphere, 1946.

Correspondence regarding the Meteorological Research Committee 'V2 sub-committee', 1945.

Copy of a proposal by Richard Silberstein for the use of rockets for the study of the ionosphere, 1945.

Correspondence regarding Negretti and Zambra's 'distant-recording Therograph', with details of its erection at Greenwich, 1939.