Referee's report by Henry Thomas Tizard, on a paper 'The mean effective pressure in reciprocating engines as influenced by considerations of the kinetic theory of gases' by Henry Homan Jeffcott Sectional Committee: Engineering Sciences Not recommended for publication in the 'Proceedings of the Royal Society of London'. The problem 'has no great scientific or practical importance'. Finds the paper far too long. Suggests publication should be postponed until experimental work has been conducted. [Not published] Endorsed on verso as received 30 November 1933. [November 1933]