Referee's report by Charles Robert Harington, on a paper 'Histochemistry of the Gram-staining reaction for micro-organisms' by H Henry and Maurice Stacey Sectional committee: Physiology Recommended for publication in Proceedings. It contain work of great interest and provides a satisfactory explanation of the mechanism. This may have implications of importance in relation to bacterial chemistry. The presentation 'leaves something to be desired' and is unsatisfactorily arranged. [Published in Proceedings of the Royal Society B, 1946]. Date received not given. 1945