Referee's report by William Hume-Rothery, on a paper 'Precipitation in the alloys of copper and silver' by Charles Sykes and W F Cox Sectional committee: Physics Recommended for publication in Proceedings. It is 'hardly of sufficient weight' to justify publication at it's current length. The authors should either cut the paper down to ensure publication in Proceedings, or submit the paper to the Institute of Metals. [Not published]. Endorsed on verso as received 3 March 1940. March 1940