Referee's report by Henry Stanley Raper, on a paper 'Studies on codehydrogenases I —Nature of growth factor "V”' by André Michel Lwoff and Marguerite Lwoff Sectional committee: Physiology Recommended for publication in Proceedings, in full or combined with paper II. There are some typing errors that should be corrected. The two papers could be combined as they are both concerned with the same subject. [Published in Proceedings of the Royal Society B, 1937]. Endorsed on verso as received 23 November 1936. 20 November 1936