Referee's report by John Mellanby, on a paper 'The influence of Witte's "peptone" and of digestion of blood platelets and plasma' by John William Pickering Sectional committee: Physiology Recommended for publication in Proceedings. Two paragraphs should be omitted as they are too speculative. [Published in Proceedings of the Royal Society B, 1929]. Endorsed on verso as received 7 March 1929. March 1929