Referee's report by Rudolph Albert Peters, on a paper 'Quantitative spectrographic analysis of biological material. III. A method for the determination of sodium and potassium in glandular secretions' by John Stuart Foster, G O Langstroth and D R McRae Sectional Committee: Physiology Recommended for publication in the 'Proceedings of the Royal Society of London'. It should appear in Proceedings A, with a summary in Proceedings B. [Published in the 'Proceedings of the Royal Society of London'] Endorsed on verso as received 13 February 1938. [February 1938]