Vol. I.--School of the Soldier; School of the Company; Instruction for Skirmishers. Vol. II.--School of the Battalion, Vol. III.--Evolutions of a Brigade; Evolutions of a Corps d'Armée. Lithographed plates. 3 vols. 24mo, cloth 1 50 *CHAUVENET, Prof. W.--New Method of Correcting Lunar Distances, and Improved Method of Finding the Error and Rate of a Chronometer, by Equal Altitudes.* 8vo, cloth 2 00 *CHURCH, JOHN A.--Notes of a Metallurgical Journey in Europe.* 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 *CLEVENGER, S. R.--A Treatise on the Method of Government Surveying,* As prescribed by the U. S. Congress and Commissioner of the General Land Office, with complete Mathematical, Astronomical, and Practical Instructions for the use of the United States Surveyors in the field. 16mo, morocco 2 50 *COFFIN, Prof. J. H. C.--Navigation and Nautical Astronomy.* Prepared for the use of the U. S. Naval Academy. Sixth edition. 52 wood-cut illustrations. 12mo, cloth 3 50 *COLBURN, ZERAH.--The Gas-Works of London.* 12mo, boards 60 *COLLINS, JAS. E.--The Private Book of Useful Alloys and Memoranda for Goldsmiths, Jewellers, etc.* 18mo, cloth 50 *COOKE, Brig.-Gen. PHILIP. ST. GEORGE.--New Cavalry Tactics.* 16mo, morocco 2 00 ---- *Cavalry Practice.* Regulations for the movements of the Cavalry of the Army. 12mo. 1 00 *CORNWALL, Prof. H. B.--Manual of Blow-Pipe Analysis, Qualitative and Quantitative.*