Referee's report by Harry Work Melville, on a paper 'The catalysis of the para-hydrogen conversion by the solid free radical aa-diphenyl-B-picryl hydrazyl' by L G Harrison and C A McDowell Sectional committee: Chemistry Paper reference code: A114 Recommended for publication in the Proceedings. Melville writes: 'The paper should be printed as it stands'. [Published in Proceedings A, 1953]. Date received not given. 12 June 1953