Referee's report by Archibald Vivian Hill, on a paper 'The mechanism of adaptation to varying salinity the common eel and the general problem of osmotic regulation in fishes' by Ancel Keys Sectional Committee: Physiology Recommended for publication in the 'Proceedings of the Royal Society of London', if reduced in length. Suggests omitting the extensive references and much of the discussion. The paper is more in the style of a review than a scientific paper. [Published in the 'Proceedings of the Royal Society of London' B, 1933] Endorsed on verso as received 27 September 1932. [September 1932]