Referee's report by Derman Guy Christopherson, on a paper 'The hydrodynamical theory of film lubrication' by W F Cope Sectional Committee: Mathematics Recommended for publication in the 'Proceedings of the Royal Society of London'. Has no issue with waiving his anonymity and corresponding directly with the author if he so wishes. Suggests further attention be paid to the issue of heat conduction. [Published in the 'Proceedings of the Royal Society of London'] No received date. 22 October 1948