Referee's report by Edmund John Bowen, on a paper 'The photolysis of ammonia' by E A B Birse and Harry Work Melville Sectional committee: Chemistry Recommended for publication in Proceedings. It is an important contribution to photochemistry. In times of peace, he would have raised no question as to the length of the paper, but if the Society is wishing to save paper then the authors should be asked to condense the paper. [Published in Proceedings of the Royal Society A, 1940]. Endorsed on verso as received 12 January 1940. January 1940