Referee's report by Thomas Stanton, on two papers 'Explosion waves and shock waves. Part I.—The wave-speed camera and its application to the photography of bullets in flight' and 'Explosion waves and shock waves Part II—The shock wave and explosion products sent out by blasting detonators' by William Payman and Donald Whitley Woodhead Sectional committee: Physics Both papers recommended for publication in Proceedings. Part one could be condensed, as it is mainly a summary of methods. ['Explosion waves and shock waves. Part I.—The wave-speed camera and its application to the photography of bullets in flight' published in Proceedings of the Royal Society A, 1931]. ['Explosion waves and shock waves Part II—The shock wave and explosion products sent out by blasting detonators' published in Proceedings of the Royal Society A, 1935]. Endorsed on verso as received 26 March 1931. March 1931