Memoranda, on a paper 'The velocity of diffusion in a mixed gas; the second approximation' by Sydney Chapman and Thomas George Cowling Sectional Committee: Not stated [Physics and Chemistry] Recommended for publication in the 'Proceedings of the Royal Society of London'. Alfred Charles Glyn Egerton thinks the paper can be passed as if it had a favourable report, as the paper has already been seen by George Paget Thomson. If not, suggests sending the paper to John Edward Lennard-Jones for referee. James Chadwick considers George Paget Thomson's reading as favourable and agrees to acceptance of the paper. [Published in the 'Proceedings of the Royal Society of London'] Endorsed on recto as received 28 April 1941. 26 April 1941