Originally published in 1915, with the third edition being published in 1922, this early works is a comprehensive and informative look at the subject. Contents Include; I. Tooth Parts, II. Spur Gear Calculations, III. Speed and Powers, IV. Gear Proportions and Details of Design, V. Bevel Gears, VI. Worm Gears, VII. Helical and Herringbone Gears, VIII. Spiral Gears, IX. Skew Bevel Gears, X. Intermittent Gears, XI. Elliptical Gears, XII. Epiclycic Gear Trains, XIII, Friction Gears, XIV. Special Bevel Gears, XV. Williams System of Internal Gearing, and, XVI, Rolled Gearing. Many of the earliest books, particularly those dating back to the 1900's and before, are now extremely scarce and increasingly expensive. We are republishing these classic works in affordable, high quality, modern editions, using the original text and artwork.