Referee's report by W H J Childs, on a paper 'Investigations of infra-red spectra. Determination of C-H frequencies (~3000 cm.-1) in paraffins and olefins, with some observations on “polythenes”' by John Jacob Fox and A E Martin Sectional committee: Chemistry Recommended for publication in Proceedings. One of the figures in the table may not be accurate. The paper is 'well written up' and sound. [Published in Proceedings of the Royal Society A, 1940]. Endorsed on verso as received January 1940. January 1940