MODERN MILLING MACHINES. Joseph G. Horner, M. E., 304 pp. 8 3/4x5 1/2 in. 269 Illustrations. Cloth, $4.00. The Norman W. Henley Pub. Co., New York.

Anyone at all familiar with the books previously written by the same author, expects much of any new one which may be announced. This one is no exception to the clearness, accuracy and attention to detail which characterizes all his writings, and the mechanic, foreman and superintendent, as well as the technical instructor, will obtain much valuable information from it.

In the present day specialization of manufacturing processes and the wide variety of work possible to certain twpes of machines, separate treatises are necessary to adequately treat them. This is particularly true of the milling machine, and the advent of this book is most opportune. As a guide to the correct and i best methods of handling work it is invaluable, that of a character requiring special skill being given special attention.

The illustrations are numerous and many of them are fully detailed drawings reduced from workshop prints; the matter of obtaining speeds and feeds having received careful attention.

It is most certainly a book for every library making any pretentions towards supplying the needs of the technical reader.

PUNCHES, DIES AND TOOLS, for Manufacturing in Presses. Joseph V. Wodworth, M. E. 483 pp. 9x5 3/4 in. 702 Lllustrations. Cloth, $4.00. The Norman W. Henley Pub. Co., New York.

This book, like the one above mentioned, is devoted to a special class of metal work, and gives, therefore, a mass of detail and practical information of the greatest value to those engaged in that special line of manufacturing. It is somewhat of a companion volume to "Dies, Their Construction and Use," by the same author, but treats the subject in a broader and more comprehensive manner, containing much matter not covered in the previous volume.

A large number of valuable and interesting processes, rules, formulas and designs have been embodied in the work, making it of inestimable value in connection with the construction, use and adaptation of dies and presses tools which form the subject matter of the books.

So much in the way of sheet metal working can be and is done today in presses that anyone in charge of a shop where such work is done must be alive to all the kinks of the work, and this work will be of great value to all such. Instructors in advanced technical schools cannot well do without it; the larger technical libraries should have it on their shelves.