Referee's report by Charles Herbert Lees, on two papers 'The diffraction of sound pulses I. Diffraction by a semi-infinite plane' and 'The diffraction of sound pulses II. Diffraction by an infinite wedge' by Frederick Gerard Friedlander Sectional committee: Physics Recommended for publication in Proceedings. Some modifications are needed. The papers and their abstracts shouldn't be published until after the war. [Both papers published in Proceedings of the Royal Society A, 1946]. Endorsed on verso as received 26 April 1940. April 1940