(Graduated Yale University, 1893, as Ph.B. In 1896 Assistant in Mining and Metallurgy at Massachusetts Institute of Technology, Boston, where he received the degree of B.S. In 1898-99, metallurgist of South Works. Illinois Steel Co., South Chicago. Superintendent in 1900 of steel foundry, Briggs-Seabury Gun and Ammunition Co., Derby, Conn. Manager of Bessemer plant, Benjamin Atha & Co., Newark, N. J., in 1901. Instructor in metallurgy, Columbia University, 1902-03. Next year became Adjunct Professor of Metallurgy, Columbia University and, as consulting metallurgist, entered the firm of Howe & Stoughton, New York.) BALE, GEORGE R. Modern Foundry Practice. Part I, 1902. Part II, 1906. London, Technical Publishing Co. 3_s._ 6_d._ each. An admirable work, the only one covering the whole field. The author thoroughly understands his subject, and writes most intelligibly. The principles underlying every detail of practice are clearly explained. Part I deals with foundry equipment, materials used, furnaces and processes, describes blowers, ladles, cranes, hoists, cupola, air furnaces, drying ovens, dry and green sand, the manufacture of chilled castings and malleable iron castings. Part II takes up machine molding, physical properties, the effects produced by various ingredients, the principles of mixing irons, cleaning castings. Costs are considered in conclusion. * * * * * BELL, SIR ISAAC LOWTHIAN. Principles of the Manufacture of Iron and Steel. London, George Routledge & Sons, 1884. 722 pp. 21_s._ A classic. Like “Chemical Phenomena of Iron Smelting,” by the same author, now out of print and rare, it will never be replaced by a new book in the metallurgist’s library, although somewhat out of date. Deals with principles ever important, while our knowledge of them increases constantly. Begins with a brief history, then passes to the direct processes for the production of iron and steel. Then follow sections on the fundamental principles of blast furnace operation, and a study of the refining of pig-iron, or, in other words, the principles of the conversion of pig-iron into wrought iron and steel. For recent metallurgical practice, some later book is to be preferred. * * * * * CAMPBELL, HARRY HUSE. Manufacture and Properties of Iron and Steel. 2d edition. New York, Engineering and Mining Journal, 1903. 839 pp. $5.00. Mr. Campbell is a careful and deep thinker. He is well known as the successful manager of a large and important steel works. Out of abundant knowledge, gathered in long experience and study, he gives in this book much valuable information. Details of the various furnaces and their operations are frequently lacking, but as a comparative study of leading methods of steel-making, and of the commercial conditions involved, this work has no equal. * * * * *