Referee's report by Cyril Norman Hinshelwood, on a paper 'Studies on the ionization produced by metallic salts in flames I. The determination of the collision frequency of electrons in coal-gas/air flames' by H Belcher and Theodore Morris Sugden Sectional committee: Physics Recommended for publication in Proceedings. Recommends the paper on general and chemical grounds but is not competent to judge if the short wave techniques employed are adequate for their purpose. [Published in Proceedings of the Royal Society A, 1950]. Date received not given. 1949