Referee's report by Ian Morris Heilbron, on a paper 'Physico-chemical studies of complex organic molecules. Part I.— Monochromatic irradiation' by Frank Philip Bowden and C P Snow Sectional Committee: Chemistry Recommended for publication in the 'Proceedings of the Royal Society of London'. The authors should make clear reference do their descriptive paper in Nature. Refers to work of Adolf Otto Reinhold Windaus, Ian Morris Heilbron and Morton [?]. Suggests shortening the introduction and expanding the discussion. [Published in the 'Proceedings of the Royal Society of London' A, 1934] Endorsed on verso as received 15 February 1934. [February 1934]