Referee's report by John Cunningham McLennan, on a paper 'The thermal expansion of bismuth by X-ray measurements' by A H Jay Sectional Committee: Physics Recommended for publication in the 'Proceedings of the Royal Society of London'. 'It is just of sufficient importance to be published but no more'. Considers the paper more suitable for the Philosophical Magazine or the London Physical Society. [Published in the 'Proceedings of the Royal Society of London' A, 1934] Endorsed on verso as received 20 September 1933. [September 1933]