Referee's report by Ronald Aylmer Fisher, on a paper 'The stability of D-arabinose adaption of Bact. lactis aerogenes' by Cyril Norman Hinshelwood and S Jackson Sectional committee: Physiology Recommended for publication in Proceedings. The author should adopt a more 'progressive attitude' by explaining what he means by direct adaptation and how suhc a theory would explain the facts. This would be more convincing. [Published in Proceedings of the Royal Society B, 1950]. Date received not given. 1949