Referee's report by Charles Herbert Lees, on a paper 'Critical and co-operative phenomena. V. Specific heats of solids and liquids' by A F Devonshire Sectional Committee: Physics Recommended for publication in the 'Proceedings of the Royal Society of London'. Suggests the author indicate the extent to which his theories can apply. [Published in the 'Proceedings of the Royal Society of London'] Endorsed on recto as received 6 October 1939. [October 1939]