Introductory Course in Mechanical Drawing, J. C. Tracy, C. E. and E. H. Lockwood, M. E., American Book Co., Boston, 155 pp. 10 1/2 x 7 1/2 Inches, $1.80.

While there are many instruction books upon this subject, an examination of this one shows that the method of treatment is both novel and interesting, and in every way calculated to rapidly advance the student to a thorough knowledge of the principles of mechanical drawing, orthographic projection and perspective. The feature which at once attracts attention is the oxtensive use of photographic illustrations of models, which so clearly present the several lessons, as to place this book in a class by itself. It is decidedly the book for beginners, and the student who will study it faithfully, will find progress easy, rapid and thorough, and upon its completion, well prepared to persue advanced work in such special lines as may seem best. Teachers in mechanical drawing will find the book of great assistance in giving an added interest to class work. It is printed on extra heavy plate paper, with 163 illustrations and eight large plates.

A Brief Course in General Fhysics, George A. Hoadley, A. M., C. E., AMERICAN Book Co., Boston, 463 pp. 7 1/4 x 5 Inches, $1. 50.

The aim of the author has been to present the different phases of the subject in a logical manner, with an adequate number of experiments, and yet have the work completed within one academic year. The latter qualification would ordinarily mean that much desirable matter be omitted, but a perusal of the book shows it to be exceptionally comprehensive, and containing experimental work of the most modern type. A feat ure which will be greatly appreciated in many schools is, that only comparatively simple forms of apparatus are required for the experimental work. Proper attention has also been given to the mechanical principles underlying the subject, thus realizing one of the important advantages derived from its study. An appendix gives additional work, for the benefit of those wishing to meet university eutrance examinations, to the 257 experiments given in the regular work.

First Lessons in Wood Working, Alfred G. Comp-ton, American Book Co., BOston, 188 pp. 7 x 5 Inches, 80 cents.

The author states that the work given in this book is designed for young pupils, say between the ages of eleven and fourteen, but as the larger portion of three chapters is given to making a panel door with mortised joints, the professional wood-worker who might read the book would be rather skeptical of finding many young people of that age who could handle tools well enough to do even a passable job of the kind. There are many other studies in simple wood-working, requiring less material and fully as instructive, which would be preferable to that mentioned, but we can perhaps excuse this in view of the fact that the balance of the book has good, usable work, which is well presented. The illustrations are 84 in number.