Summary: THE papers contained in the present volume are mainly of scientific interest. There are several studies of the equilibrium in binary and ternary alloys, including a remarkably well illustrated account of the alloys of copper and cadmium. Sir Henry Fowler gives a survey of the use of non-ferrous metals in engineering, and the president, Prof. Turner, devotes his address mainly to the importance of research in metallurgy. A practical investigation of the failure of some brass tubes, by Mr. Millington and Prof. Thompson, is chiefly interesting through leading the authors to a rather speculative, but highly ingenious, view of the mechanism of fatigue. The discussion on this paper shows how diverse are present opinions as to the nature of fatigue. A paper from Stockholm, partly covering the same ground as a recent communication from the National Physical Laboratory, treats of the study of inter-metallic compounds by means of X-rays. The volume contains a great deal of interesting matter, and, as usual, includes very full abstracts of the current literature relating to non-ferrous metallurgy.