8vo, cloth 2 00

CLARK, D. KINNEAR, C.E.—Fuel,

Its Combustion and Economy; consisting of Abridgments of Treatise on the Combustion of Coal and the Prevention of Smoke, by C. W. Williams; and the Economy of Fuel, by T. S. Prideaux. With extensive additions on recent practice in the Combustion and Economy of Fuel: Coal, Coke, Wood, Peat, Petroleum, etc. 12mo, cloth 1 50

—— A Manual of Rules, Tables, and Data for Mechanical Engineers.

Based on the most recent investigations. Illustrated with numerous diagrams. 1,012 pages. 8vo, cloth 7 50

Half morocco 10 00

CLARK, Lt. LEWIS, U. S. N.—Theoretical Navigation and Nautical Astronomy.

Illustrated with 41 wood-cuts. 8vo, cloth 1 50

CLARKE, T. C.—Description of the Iron Railway Bridge over the Mississippi River at Quincy, Illinois.

Illustrated with 21 lithographed plans. 4to, cloth 7 50