Referee's report by Sydney Arthur Monckton Copeman, on a paper 'An investigation into the periodicity of measles epidemics in London from 1703 to the present day by the method of the periodogram' by John Brownlee Sectional Committee: Physiology Recommended for publication in the 'Proceedings of the Royal Society of London', if the charts are not considered too numerous. Suggests the author might carefully revise to improve clarity. [Published in the Philosophical Transactions of the Royal Society B, 1918] Endorsed on verso as received 18 January 1918. 17 January 1918