Referee's report by Cyril Norman Hinshelwood, on a paper 'The influence of pressure on the spontaneous ignition of inflammable gas-air mixtures - IV—methane-, ethane-, and propane-air mixtures' by Donald T A Townend and E A C Chamberlain Sectional Committee: Chemistry Not recommended for publication in the 'Proceedings of the Royal Society of London'. The results are undoubtedly good, but it is doubful 'whether they lend themselves to quantitative theoretical interpretation in a way which justifies their reproduction in such detail'. Suggests the paper be shortened if it is to be suitable for publication. [Published in the 'Proceedings of the Royal Society of London'] Endorsed on verso as received 10 September 1935. [September 1935]