Referee's report by Christopher Kelk Ingold, on two papers 'The mechanism of chemical change. Part II.—Catalysis of the mutarotation of beryllium benzoylcamphor' and 'The mechanism of Chemical change. —Part III. mutarotation of Aluminium Benzoylcamphor' by Thomas Martin Lowry and Ralph C Traill Sectional committee: Chemistry Both papers recommended for publication in Proceedings. Part one should be made short enough to appear in Proceedings. Part two should be re-written as it is unnecessarily detailed. [Noth papers published in Proceedings of the Royal Society A, 1931]. Endorsed on verso as received 18 April 1931. April 1931