Referee's report by Ralph Howard Fowler, on a paper 'The equilibrium of heterogeneous systems including electrolytes. Part II.— equilibrium at interfaces and the theory of electro-capillarity' by John Alfred Valentine Butler Sectional committee: Physics Recommended for publication in Proceedings, in full. Some modifications should be made. [Published in Proceedings of the Royal Society A, 1925]. Endorsed on verso as received 3 November 1926. November 1926