Referee's report by William Arthur Bone, on a paper 'Nitrogen oxides in internal combustion engine gases' by T K Hanson and Alfred Charles Glyn Egerton Sectional Committee: Chemistry Recommended for publication in the 'Proceedings of the Royal Society of London'. Suggests adding an explanatory footnote for the expression 'mol. fraction x 10-5'. [Published in the 'Proceedings of the Royal Society of London'] Endorsed on verso as received 18 August 1937. [August 1937]