Contents.—The Chemistry of Carbon and Silicon. Historical Review of Existing Theories concerning the Constitution of the Alumino-silicates and other Silicates. Critical Examination of Existing Theories concerning Alumino-silicates. A Hypothesis concerning the Bonding of the Atoms in Alumino-silicates and Allied Compounds. The Consequences of the “Hexite-Pentite Theory,” and the Facts: (I.) The Reaction during Double Decomposition; (II.) The Genetic Relationship between the various Alumino-silicates; (III.) The Possibility of a Chemical System of Alumino-silicates; (IV.) The Variable Chemical Behaviour of part of the Aluminium in Kaolin, Nepheline and in the Epidotes; (V.) The Minimum Molecular Weight of Alumino-silicates; (VI.) The Constitution of Andesite; (VII.) The Possibility of Isomerism; (VIII.) Water of Crystallisation and of Constitution: Basic and Acid Water; (IX.) Prognoses; (X.) The Constitution of the Complexes of Molybdenum and Tungsten; (XI.) The Constitution of Clays; (XII.) Ultramarines; (XIII.) A New Theory of Hydraulic Binding Materials and particularly of Portland Cements; (XIV.) A New Theory of the Porcelain Cements as used for Dental Fillings; (XV.) A New Theory of Glass, Glazes and Porcelain; (XVI.) The Hexite-Pentite Theory as a General Theory of Chemical Compounds. The Conversion of the H.P. Theory into a Stereochemical Theory and the combination of the latter with the modern theory of the Structure of Crystals. Summary and Conclusions. Bibliography of references mentioned in Text. Appendix. Formulæ and Analyses. Bibliography of references in Appendix.

Industrial Chemistry. A Manual for the Student and Manufacturer. 2nd Edn. Revised and Enlarged. Edited by Allen Rogers, in charge of Industrial Chemistry, Pratt Institute, Brooklyn, N.Y.; in collaboration with many Experts. 340 Illustrations. Royal 8vo.

Contents.—General Processes. Materials of Construction. Water for Industrial Purposes. Fluids. Producer Gas. Power Transmission, Boilers, Engines and Motors. Sulphuric Acid. Nitric Acid. Salt and Hydrochloric Acid. Commercial Chemicals. Chlorine and Allied Products. Electro-chemical Industries. Lime, Cement and Plaster. Clay, Bricks and Pottery. Glass. Dutch Process White Lead. Sublimed White Lead. Pigments, Oils and Paints. The Metallurgy of Iron and Steel. Fertilizers. Illuminating Gas. Coal Tar and its Distillation Products. The Petroleum Industry. The Destructive Distillation of Wood. Oils, Fats and Waxes. Lubricating Oils. Soaps, Glycerine and Candles. Laundering. Essential Oils, Synthetic Perfumes and Flavouring Materials. Resins, Oleo-Resins, Gum-Resins and Gums. Varnish. Sugar. Starch, Glucose, Dextrin and Gluten. Brewing and Malting. Wine Making. Distilled Liquors. Textiles. Dyestuffs and their Application. The Art of Paper Making. Explosives. Leather. Vegetable Tanning Materials. Glue and Gelatine. Casein.

Elements of Industrial Chemistry. Edited by Allen Rogers. An Abridgment of the Manual of Industrial Chemistry prepared especially for Students. Demy 8vo. 520 pages. 117 Illustrations. 16/- net.

Contents.—General Processes. Water for Industrial Purposes. Fuels. Sulphuric Acid. Nitric Acid. Hydrochloric Acid. Elements and Compounds. Electro-chemical Industries. Lime, Cement and Plaster. Ceramic Industries. Pigments and Paints. Iron and Steel. Fertilisers. Organic Chemicals. Illuminating Gas. Coal Tar and Distillation Products. Petroleum. Distillation of Wood. Oils, Fats and Waxes. Soap and Glycerine. Essential Oils. Gums and Resins. Sugar, Starch and Glucose. Brewing. Wine Making and Distilling. Textiles. Dyestuffs. Paper and Cellulose Industries. Explosives. Leather.

Laboratory Guide of Industrial Chemistry. Allen Rogers, Editor of “A Manual of Industrial Chemistry,” “Elements of Industrial Chemistry,” etc. Demy 8vo. 212 pages. 33 Illustrations. 2nd Revised and Enlarged Edition. 15/- net.

Contents.—General Process. Inorganic Preparations. Organic Preparations. Dyeing of Textile Fibres. Pigments and Lakes. Driers, Varnishes, Paints and Stains. Soap and Allied Products. Leather Manufacture. Wood Fibre, Pulp and Paper. Useful Data.

The Application of Physico-Chemical Theory to Technical Processes and Manufacturing Methods. Dr. R. Kremann. Translated by H. E. Potts, M.Sc. ([See p. 51.])

The Chemistry and Technology of Printing Inks. Norman Underwood and Thomas V. Sullivan. Medium 8vo. 12/6 net.