Referee's report by Joseph Ernest Petavel, on a paper 'The rate of heat transmission from the working fluid in an internal combustion engine' by A H Gibson Sectional Committee: Physics Recommended for publication in the Proceedings of the Royal Society of London, as an abstract, with a full account referred to a technical society. The conclusions will be valuable to designers. [Not published] Endorsed on verso as received 6 March 1923. [March 1923]