Of its operations while under his command. With maps and plans. 8vo, cloth 1 00

Paper. 50

McCULLOCH, Prof. R. S.—Elementary Treatise on the Mechanical Theory of Heat, and its application to Air and Steam Engines.

8vo, cloth 3 50

MANUAL OF BOAT EXERCISE.

At the U. S. Naval Academy, designed for the practical instruction of the Senior Class in Naval Tactics. 18mo, flexible cloth 50

MENDELL, G. H.—Military Surveying.

A Treatise on Military Surveying, Theoretical and Practical, including a description of Surveying Instruments. With 70 wood-cut illustrations. 12mo, cloth 1 50

MERRILL, Col. WM. E., U. S. A.—Iron Truss Bridges for Railroads.

The method of calculating strains in Trusses, with a careful comparison of the most prominent Trusses, in reference to economy in combination, etc., etc. Illustrated. 4to, cloth 5 00