Referee's report by John Desmond Bernal, on a paper 'The lattice spacings of solid solutions of different elements in aluminium' by H J Axon and William Hume-Rothery Sectional committee: Chemistry Recommended for publication in Proceedings. The paper is important but in view of the paper shortage, it should be presented in a more economical way. It would be interesting to add a discussion on the data in light of Pauling's recent theory of metallic valencies. [Published in Proceedings of the Royal Society A, 1948]. Date received not given. 1947