Referee's report by Cyril Norman Hinshelwood, on a paper 'The slow combustion of ethylene' by William Arthur Bone, A E Haffner and H F Rance Sectional Committee: Chemistry Recommended for publication in the 'Proceedings of the Royal Society of London'. The paper does not do justice to the problem, but it continues the work of William Arthur Bone well. [Published in the 'Proceedings of the Royal Society of London' A, 1933] Endorsed on verso as received 18 September 1933. [September 1933]