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23 Murray Street, and 27 Warren Street, New York.

Weisbach. A Manual of Theoretical Mechanics. By Julius Weisbach. Ph. D. Translated by Eckley B. Coxe. A.M.. M.E., 1,100 pages and 902 wood-cut illustrations. 8vo, cloth.........$10.00

Francis. Lowell Hydraulic Experiments - being a Selection from Experiments on Hydraulic Motors, on the Flow of Water over Weirs, and in open Canals of Uniform, Rectangular Section, made at Lowell, Mass By J. B. Francis, Civil Engineer. Third edition, revised and enlarged, with 23 copper - plates, beautifully engraved, and about 100 new pages of text. 4to. cloth.........15.00

Kirkwood. On the Filtration of River Waters, for the Supply of Cities, as practised in Europe. By James P. Kirkwood. Illustrated by 30 double-plate engravings. 4to. cloth. .......15.00

MiniflE. A Text-Book of Geometrical Drawing, for the use of Mechanics and Schools. With Illustrations for Drawing Plans, Elevations of Buildings and Machinery. With over 200 diagrams on steel. By William Minifie, Architect. Ninth edition. Royal 8vo, cloth......$4 00

Minifie. Geometrical Drawing. Abridged from the octavo edition, for the use of Schools. Illustrated with 48 steel plates. New edition, enlarged. 12mo, cloth. 2 00

Free Hand Drawing. A Guide to Ornamental, Figure, and Landscape Drawing. By an Art Student. Profusely illustrated. l8mo, boards, . ... 0

Axon. The Mechanic's Friend. A Collec-tion of Receipts and Practical Suggestions, relating to Aquaria - Bronzing - Cements - Drawing - Dyes-Electricity-Gildiug - Glass-working - Glues - Horology - Lacquers - Locomotives - Magnetism - Metal-working - Modelling - Photography - Py-rotechny - Railways - Solders - Steam - Engine - Telegraphy-Taxidermy - Varnishes - Waterproofing-and Miscellaneous Tools, Instruments, Machines, and Processes connected with the Chemical and Mechanical Arts. By William E. Axon, M.R.S.L. 12mo, cloth. 300 illustrations, . . . 1 50

Harrison. Mechanics' Tool Book, with Practical Rules and Suggestions, for the use of Machinists, Iron Workers, and others. By W. B. Harrison. 44 illustrations. 12mo, cloth....... 1 50

J0Yns0n. The Miscellanies And Student's Guide in the designing wild Construction of General Machine Gearing. Edited by Francis II. Joynson. With 18 folded plates. 8vo, cloth 2 00

D. Van Nostrand's Publications.

Williamson. Practical Tables in Mete. orology and Hypsometry. in connection with the use of the Barometer By Col. R. S. Williamson, U. 8. A. 4to, flexible cloth, $2 50

Butler. Projectiles and Rifled Cannon A Critical Discussion of the Principal Sys terns of Rifling and Projectiles, with Practical Suggestions for their Improvement. By Capt. John S. Butler, Ordnance Corps, U. S. A. 36 Plates. 4to, cloth, . . 7 50

Benet. Electro-Ballistic Machines, and the Schultz Chronoscope. By L.t.-Col 8. V Benet, Chief of Ordnance U. 8. A-Second edition, illustrated. 4to, cloth, . 3 00

Michaelis. The Le Boulenge Chronograph. With three lithographed folding plates of illustrations. By Bvt. Captian O. E. Michaelis, Ordnance Corpse, U. S. A. 4to, cloth,..... 3 00

Nugent. Tteatise on Optics; or Light and Sight, theoretically and practically treated; with the application to Fine Art and Industrial Pursuits. By E. Nugent. With 103 illustrations. 12mo, cloth, . . . 1 50

Pe1rce. System of Analytic Mechanics. By Benjamin Peirce, Professor of Astronomy and Mathematics in Harvard University. 4to cloth, .......10 00

Craig. Weights and Measures. An Account of the Decimal System, with Tables of Conversion for Commercial and 8cientiflo Uses. By B. F. Craig, M. D. Square 32mo, limp cloth, ....... 50

Alexander. Universal Dictionary of Weights and Measures, Ancient and Modern, reduced to the standards of the United States of America. By J. H. Alex-anler. New edition. 8vo, cloth, . .3 50

Randall. Quartz Operator's Hand-Book. By P. M. Randall. New Edition. Revised and Enlarged. Fully illustrated. 12mo, cloth,..... . . $2 00

Loring. A Hand-Book on the Electro-Magnetic Telegraph. By A. E. Loring. 18mo, illustrated. Paper boards, 50 cents; cloth. 75 cents; morocco,.......1 00 barnes. Submarine Warfare, Defensive and Offensive. Descriptions of the various forms of Torpedoes, Submarine Batteries and Torpedo Boats actually used in War. Methods of Ignition by Machinery, Contact Fuzes, and Electricity, and a full account of experiments made to determine the Explosive Force of Gunpowder under Water. Also a discussion of the Offensive Torpedo system; its effect upon Iron-clad Ship systems, and influence upon future Naval Wars. Bv Lieut.-Com. John S. Barnes. U. S.N. With 20 lithographic plates and many wood-cuts. 8 vo, cloth, 5 00 foster. Submarine Blasting, in Boston Harbor, Mass. Removal of Tower and Corwin Bocks. By John G. Foster, U. S. Eng. and Bvt. Major General U. S. Army, with seven Plates. 4to, cloth, 3 50

Plympton. The Aneroid Barometer. Its instruction and Use, compiled from several sources. 16mo, boards, illustrated, 60 cent-; morocco,........1 00

Williamson. On The Use Of The: Barometer on Surveys and Reconnaissances.

Part I.-Meteorology in its Connection with Hypsometry. Part- II. - Barometric Hyp-sometry. By R. S. Williamson, Bvt Lt.-Col. U.S.A., Major Corps of Engineers. With illustrative tables and engravings.

460. cloth..... 15 00

MacCord. A Practical Treatise on the Slide: Valve, by Eccentrics - examining by methods the action of the Eccentric upon the Slide Valve, and explaining the practical processes of laying out the movements, adapting the valve for its various duties in the steam-engine. By C. W. Mac Cord, A, M., Professor of Mechanical Drawing, Stevens' Institute of Technology, Hoboken, N. J. Illustrated. 4to, cloth.........$3 00

Porter. A Treatise on the Richards' Steam-Enoine Indicator, and the Development and Application of Force in the Steam-Engine. By Charles T. Porter. Third edition, revised and enlarged. Illustrated. 8vo, cloth, . . 3 50

Mcculloch a treatise on the mechani-cal Theory of Heat, and its applications to the Steam-Engine. By Prof. R. S. McCulloch, of the Washington and Lee University, Lexington, Va. 8vo, cloth, . . 3 50

Van 6uren. Investigations Of Formulas - for the Strength of the Iron parts of Steam Machinery By J. D. Van Buren, Jr.. C. E. Illustrated. 8vo, cloth, . 2 00

Stuart. How to Become a Successful Engineer. Being Hints to Youths intending to adopt the Profession. By Bernard Stuart, Engineer Sixth edition l8mo, boards, ..... 50

Shields. Notes on Engineering Construction. Embracing Discussions of the Principles involved, and Descriptions of the Material employed in Tunneling, Bridging, Canal and Road Building, etc., etc. By J. E. Shields, C. E. 12mo. cloth, . . . 1 50

Weyrauch. Strength and Calculation op Dimensions of Iron and Steel Constructions. Translated from the German of J. J. Weyrauch, Ph. D., with four folding Plates. 12mo, cloth, . . . $1 00

Stuart. The Naval Dry Docks of the United States. By Charles B. Stuart, Engineer in Chief, U. S. Navy. Twenty-four engravings on steel. Fourth edition. 4to, cloth, . . 6 00

Collins. The Private Book op Useful Alloys, and Memoranda for Goldsmiths, Jewellers, etc. By James E. Collins. 18mo, flexible cloth,.....50

Tunner. A Treatise on Roll-Turning for the Manufacture of Iron. By Peter Tun-ner Translated by John B. Pearse. With numerous wood-cuts, 8vo, and a folio Atlas of 10 lithographed plates of Rolls, Measurements, etc. Cloth, . . 10 00

Gruner. The Manufacture of Steel. By M. L. Gruner. Translated from the French, by Lenox Smith, A.M., E.M.; with an Appendix on the Bessemer Process in the United States, by the translator. Illustrated by lithographed drawings and wood-cuts. 8vo, cloth, . . . . 3 50

Barba. The Use of Steel in Construction. Methods of Working, Applying, and Testing Plates and Bars. By J. Barba. Translated from the French, with a Preface by A.L. Holley,P.B. Illustrated. 12mo, cloth, 150

Shock. Steam Boilers; their Design. Construction, and Management, by William A. Shock, Engineer-in-Chief, U.S.N.: Chief of Bureau of Steam Engineering, U.S.N. 480 pages. Illustrated with 150 woodcuts and 86 full-page plates (80 double). 4to, illustrated, half morocco........15 00

No. 28. - On Transmission' Of Power By Wire Rope. By Albert W. Stahl.

Fully illustrated.

No. 29. - Injectors; Their Theory And Use. Translated from the french of M. Leon Pouchet Illustrated.

No, 30. - Terrestrial Magnetism And The Magnetism Op Iron Ships. By Prof. Fairman Rogers. Illustrated.

No. 31. - The Sanitary Condition Of Dwelling Houses In Town And Country. By George E. Waring, Jr., Consulting Engineer for Sanitary and Agricultural Works.

No. 32.-Cable Making For Suspension

Bridges, As Exemplified In The Construction Of The East River Bridge. By Wllhelm Hlldenbrand, C. E. Fully Illustrated.

No. 33. - Mechanics Of Ventilation. By George W. Rafter, Civil Engineer.

No. 34. - Foundations. By Prof. Jules Gaud-ard, C. E. Translated from the French, by L. F. Vernon Harcourt, M. I. C. E.

No. 35. - The Aneroid Barometer: Its < struction and Use. Compiled by Prof. W. Plympton. 2d Revised Edition. Illus

No. 36. - Matter And Motion. By J. Clerk Maxwell.

No.37. - Geographical Surveying: Its Uses,Methods and Results. By Frank De yeaux Carpenter.

No.38. - Maximum Stresses In Framed Bridges. By Prof. Wm. Cain. Illustrated.

No. 39 - A Handbook Op The ElectroMagnetic Telegraph. By A. E. Loring, a Practical Telegrapher. Illustrated.