"Not merely a dictionary, but, to a certain extent, also a most valuable guide. It strikes us as a happy idea to combine with a definition of the phrase useful information on the subject of which it treats."—Machinery Market.

Mill Gearing.

TOOTHED GEARING: A Practical Handbook for Offices and Workshops. By A Foreman Pattern Maker, Author of "Pattern Making," "Lockwood's Dictionary of Mechanical Engineering Terms," &c. With 184 Illustrations. Crown 8vo, 6s. cloth.

[Just published.

Summary of Contents.

Chap. I. Principles.—II. Formation of Tooth Profiles.—III. Proportions of Teeth.—IV. Methods of Making Tooth Forms.—V. Involute Teeth.—VI. Some Special Tooth Forms.—VII. Bevel Wheels.—VIII. Screw Gears.—IX. Worm Gears.—X. Helical Wheels.—

XI. Skew Bevels.—XII. Variable and other Gears.—XIII. Diametrical Pitch.—XIV. The Odontograph.—XV. Pattern Gears.—XVI. Machine Moulding Gears.—XVII. Machine Cut Gears.—XVIII. Proportion of Wheels.

"We must give the book our unqualified praise for its thoroughness of treatment, and we can heartily recommend it to all interested as the most practical book on the subject yet written.—Mechanical World.

Stone-working Machinery.