12mo., cloth, $1 25
DAVIS.—A TREATISE ON HARNESS, SADDLES, AND BRIDLES:
Their History and Manufacture from the Earliest Times down to the Present Period. By A. Davis, Practical Saddler and Harness Maker. (In press.)
DESSOYE.—STEEL, ITS MANUFACTURE, PROPERTIES, AND USE.
By J. B. J. Dessoye, Manufacturer of Steel; with an Introduction and Notes by Ed. Graten, Engineer of Mines. Translated from the French. In one volume, 12mo. (In press.)
DIRCKS.—PERPETUAL MOTION:
Or Search for Self-Motive Power during the 17th, 18th, and 19th centuries. Illustrated from various authentic sources in Papers, Essays, Letters, Paragraphs, and numerous Patent Specifications, with an Introductory Essay by Henry Dircks, C. E. Illustrated by numerous engravings of machines. 12mo., cloth, $3.50
DIXON.—THE PRACTICAL MILLWRIGHT’S AND ENGINEER’S GUIDE:
Or Tables for Finding the Diameter and Power of Cogwheels; Diameter, Weight, and Power of Shafts; Diameter and Strength of Bolts, etc. etc. By Thomas Dixon. 12mo., cloth, $1.50
DUNCAN.—PRACTICAL SURVEYOR’S GUIDE: