Referee's report by Sydney Chapman, on two papers 'A flow method for comparing the specific heats of gases part I. The experimental method' and 'A flow method for comparing the specific heats of gases. part II. The theory of the method' by Patrick Maynard Stuart Blackett, P S H Henry and Eric Keightley Rideal Sectional Committee: Physics Recommended for publication in the 'Proceedings of the Royal Society of London'. [Both paper published in the 'Proceedings of the Royal Society of London' A, 1930] Endorsed on verso as received 16 November 1929. [November 1929]