Baker.—Long-Span Railway Bridges. By B. Baker. 12mo. $1 50

Baker.—The Mathematical Theory of the Steam-Engine, with Rules and Examples for the use of Practical Men. 12mo. 75

Barlow.—The History and Principles of Weaving by Hand and Power. Illustrated. 8vo. $10 00

Barr.—A Practical Treatise on High Pressure Steam Boilers. Illustrated. 8vo. $3 00

Barr.—Practical Treatise on the Combustion of Coal. Illustrated. 8vo. $2 50

Bauerman.—Treatise on the Metallurgy of Iron. Illustrated. 12mo. $2 00

Bayles.—House Drainage and Water Service in Cities, Villages, and Rural Neighborhoods. By James C. Bayles. Illustrated with wood-cuts and folding plates. 8vo. $3 00

Beans.—Treatise on Railroad Curves and the Location of Railroads. By E. W. Beans $1 50

Beckett.—Treatise on Clocks, Watches, and Bells. By Sir Edmund Beckett, Bart. Illust. 12mo. $2 25

Bell.—Carpentry Made Easy; or, the Science and Art of Framing. Illust. by 44 plates. 8vo. $5 00