Referee's report by Louis Napoleon George Filon, on a paper 'On the action of viscosity in increasing the spacing ratio of a vortex street' by Stanley George Hooker Sectional Committee: Engineering Sciences Recommended for publication in the 'Proceedings of the Royal Society of London'. Suggests omitting some of the figures. Discusses points of the work which the author may wish to address, including notation and argument clarification. [Published in the 'Proceedings of the Royal Society of London'] Endorsed on verso as received 14 August 1935. [August 1935]