"The properties of the different grades of mineral oil and of the animal and vegetable non-drying oils are carefully described, and the author justly insists that the peculiarities of the machinery on which the lubricants are to be employed must be considered almost before everything else.... The chapters on grease and solidified oils, etc., are excellent."--_The Ironmonger._ * * * * * SOAPS. A Practical Manual of the Manufacture of Domestic, Toilet and other Soaps. By GEORGE H. HURST, F.C.S. Illustrated with Sixty-six Engravings. 390 pp. 1898. Price 12s. 6d.; India and Colonies, 13s. 6d.; Other Countries, 15s.; strictly net. =Contents.= Chapters I., Introductory.--II., Soap-maker's Alkalies.--III., Soap Fats and Oils.--IV., Perfumes.--V., Water as a Soap Material.--VI., Soap Machinery.--VII., Technology of Soap-making.--VIII., Glycerine in Soap Lyes.--IX., Laying out a Soap Factory.--X., Soap Analysis.--Appendices. =Press Opinions.= "We think it is the most practical book on these subjects that has come to us from England so far."--_American Soap Journal._ "Much useful information is conveyed in a convenient and trustworthy manner which will appeal to practical soap-makers."--_Chemical Trade Journal._ "Works that deal with manufacturing processes, and applied chemistry in particular, are always welcome. Especially is this the case when the material presented is so up-to-date as we find it here."--_Bradford Observer._ "The best and most reliable methods of analysis are fully discussed, and form a valuable source of reference to any works' chemist.... Our verdict is a capitally produced book, and one that is badly needed."--_Birmingham Post._ * * * * * ANIMAL FATS AND OILS: Their Practical Production, Purification and Uses for a great Variety of Purposes. Their Properties, Falsification and Examination. A Handbook for Manufacturers of Oil and Fat Products, Soap and Candle Makers, Agriculturists, Tanners, Margarine Manufacturers, etc., etc. By LOUIS EDGAR ANDES. Sixty-two Illustrations. 240 pp. 1898. Demy 8vo. Price 10s. 6d.; India and Colonies, 11s.; Other Countries, 12s.; strictly net. =Contents.=