Referee's report by James Colquhoun Irvine, on a paper 'The photosynthesis of naturally occurring compounds.—III. Photosynthesis in vivo and in vitro' by Edward Charles Cyril Baly and J B Davies Sectional committee: Chemistry Recommended for publication in Proceedings, in full. This is the most important and interesting paper of the series. [Published in Proceedings of the Royal Society A, 1927]. Endorsed on verso as received [1927]. [1927]