Experimental and Theoretical Applications of Thermodynamics to Chemistry. Walter Nernst, University of Berlin. Extra Crown 8vo. 9/- net.

Vapours for Heat Engines. William D. Ennis, M.E., M.Am.Soc.M.E., Professor of Mechanical Engineering in the Polytechnic Institute of Brooklyn, Author of “Applied Thermodynamics for Engineers,” etc. With 21 Tables and 17 Illustrations. Demy 8vo. 6/6 net.

The Manufacture of Chemicals by Electrolysis. A Treatise of Electro-Chemistry Series. A. J. Hale, B.Sc., F.I.C. Demy 8vo. Illustrated. 6/- net. ([See p. 39.])

The Hydrogenation of Oils. Catalyzers and Catalysis and the Generation of Hydrogen. Carleton Ellis, S.B. New and Revised Edition. 40/- net.

Introduction to the Chemistry and Physics of Building Materials. Alan E. Munby, M.A.(Cantab.). Extra Crown 8vo. 7/6 net.

A Calendar of Leading Experiments. W. S. Franklin and Barry Macnutt. 16/6 net.

The Chemistry of Paints and Paint Vehicles. By C. H. Hall, B.S. Crown 8vo.

The Chemistry of the Oil Industries. J. E. Southcombe, M.Sc., Lecturer on Oils and Fats, Royal Salford Technical Institute, etc. Illustrated. 9/- net.

Contents.—Preface. Introductory Organic Chemistry. Mineral Oils. Natural Sources and Methods of Preparation of the Saponifiable Oils and Fats. Impurities occurring in Crude Oils and Fats and the Technical Methods of Removing them. Composition and Properties of the Saponifiable Oils and Fats in general. The Natural Waxes. Analytical Methods. Industrial Applications of Fats and Oils. Saponification of Fats and Oils. Candle Manufacture, Soap Making, Glycerine. Conclusion. Scientific and Technical Research on Problems in the Oil and Related Industries. Literature Index. Illustrations