1. The following publications are those referred to directly in the text. A full bibliography
2. appears on the accompanying microfiche numbered as in the second column. A photocopy is
3. available from the Royal Society Library at cost.
4. Photoelectric relays for galvanometers;Nature,1934
5. (20) 1952 (With C.W. McCombie) Brownian fluctuations in galvanometers and galvanometer