Dies ; Their Construction and Use for the Modern Working of Sheet Metals. By Joseph V. Wood-worth. 384 pp. 9 x 5 1/2 inches. 505 illustrations. Price $3.00. The Norman W. Henley Pub. Co., New York.

The use of the power press for the cheap and rapid production of sheet metal parts has progressed at such a pace during the last few years that a comprehensive book upon the above subject is at once of the greatest value to every mechanic engaged in work calling for use of dies. Competition is now so keen in manufacturing work of this kind that the most approved of modern methods are necessary to those who would attain or maintain supremacy, consequently this book upon the construction and use of dies is of great value. In writing it the author aimed to give practical men a complete presentation of all parts of the work, the fixtures and devices in use, from the simplest to the most intricate, together with numerous examples of work fully illustrated in the different stages of production. These are described in such a clear manner that all grades of metal working mechanics will be able to understand how to design, construct and Use them, and all who may be in any way interested in the manufac ture of sheet metal parts may learn the best tools and processes to use.

While this subject is rather advanced for manual training schools, the book is one which would be very useful for reference and supplementary reading by those expecting to take up mechanical work upon graduating, and should be added to the list of every public library having funds for purchasing it.

American Tool Making and Interchangable Manufacturing. By Joseph V. Wood worth. 535 pp., 9 x5 1/2 inches. 601 illustrations. The Norman W. Hen-ley Pub. Co., New York.

To the machinist who expects to attain to position above that of the ordinary workman, a knowledge of tool making, as applied to interchangable manufacturing, is pretty nearly an absolute necessity. To such a one, as well as the manufacturer, this book will be of great value. The supremacy accorded the machin" ery made in this country is to quite an extent due to the fact that the feature for interchangable parts governs whenever it has been possible to have it. This is now so generally demanded as to make it necessary that tools be manufactured by processes which will produce this result. The author of this book fully recognized this, and arranged the text and illustrations to give accurate and concise descriptions of the fundamental principles, methods and processes by which the greatest accuracy and highest efficiency could be obtained in the production of repetition parts at a minimum of cost. He also describes and illustrates a large number of special tools, together with their construction and use, as far as space would permit. All of which is done in a clear, practical way, which can easily be understood by the .reader. The manufacturer, the practical machinist, the technical instructor and intelligent apprentice will alike find this an indispensible text-book, the careful study of which will be of the greatest profit.

The Standard Electrical Dictionary. By T. O'-Conor Sloane. 682 pp.,7x 5 inches. Price $3.00. The Norman W. Henley Co., New York. The practical electrician and student will both find this dictionary a handy book of reference. While as compact as the subject will permit, yet the system of indexing and the use of synonyms following a subject enable the reader to quickly follow up any particular line upon which information is desired. As the present is the tenth edition, the usefulness of the book needs no further evidence.

Pattern Making and Foundry Practice. By L. H.

Hand. 145 pp. 6 1/2x4 1/4 inches. 104 illustrations.

Flexible leather. Price $1.50. Frederick S. Drake

& Co., Chicago, 111.

The author of this book, a practical pattern maker familiar with all branches of the subject, has condensed into the limits of a pocket manual numerous examples and a great deal of information upon this important subject. In particular, several examples of railway car parts and some structural shapes are noted. The practical experience of the author is in evidence throughout the book.

The Electro-Plater's Hand Book. By James H.

Weston. 278 pp. 6 1/2 x 4 1/4 inches. 50 illustrations.

Flexible cloth. Frederick S. Drake & Co., Chicago.

This book has been written to meet the requirements of platers desiring a practical and yet non-technical work on electro-plating. Platers of practical experience have been freely consulted in its preparation, thus giving to the contents a wider range of adaptability than is frequently the case with handbooks of this kind. The directions for the various operations are clearly given and suitably illustrated.

To fit boys to become apprentices in the shops of the Pennsylvania R. R., the board of education of Altoona has adopted a special course of instruction in the high school of that city. The plan is indorsed by the Pennsylvania officials, who co-operated with the school authorities in preparing the new course of instruction.

Russia is the fortunate country which produces about ninety per cent of the world's platinum. The remainder comes mainly from Columbia, South America.

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