Referee's report by Hugh Longbourne Callendar, on a paper 'The energy in air, steam and carbon dioxide from 100C to 2000C' by W D Womersley Sectional Committee: Physics Recommended for publication in the 'Philosophical Transactions of the Royal Society'. The paper should be printed in full with all illustrations. Refers to D Clerk of the British Association Committee on Gaseous Explosions, whose views the paper supports. [Not published] Endorsed on verso as received 10 October 1921. [October 1921]