Referee's report by John William Strutt, Lord Rayleigh, on a paper 'The Rankine trochoidal wave' by Alfred George Greenhill Sectional Committee: Mathematics Apologises for not being able to give a report on the paper. Assumes there will be a presumption in favour of publication. [Published in the 'Proceedings of the Royal Society of London' A, 1918] Endorsed on verso as received 28 June 1917. [June 1917]