Referee's report by Robert John Strutt, Lord Rayleigh, on a paper 'The absorption of X-rays' by E A Owen Sectional Committee: Physics and Chemistry Recommended for publication in the 'Proceedings of the Royal Society of London'. [Published in the 'Proceedings of the Royal Society of London' A, 1918] Endorsed on verso as received 8 April 1918. [April 1918]