Referee's report by Alfred William Porter, on a paper 'The viscosity of strong electrolytes measured by a differential method' by W M Cox and J H Wolfenden Sectional Committee: Physics Not recommended for publication in the 'Proceedings of the Royal Society of London' in its present form. Suggests improving the figure and description of the apparatus and references between them. The method of measuring should be described, and the use of language improved. Comments on the formula and presentation of the results. [Published in the 'Proceedings of the Royal Society of London' A 1934] Endorsed on verso as received 16 August 1933. 15 August 1933