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HAMILTON. USEFUL INFORMATION FOR RAILWAY MEN. Compiled by W. G. Hamilton, Engineer. Seventh edition, revised and enlarged. 577 pages. Pocket form, morocco, gilt,

STUART. THE CIVIL AND MILITARY ENGINEERS OF AMERICA. By General Charles B. Stuart, Author of "Naval Dry Docks of the United States," etc., etc. With nine finely-executed Portraits on steel, of eminent Engineers, and illustrated by Engravings of some of the most important and original works constructed in America. 8vo, cloth,

ERNST. A MANUAL OF PRACTICAL MILITARY
ENGINEERING. Prepared for the use of the
Cadets of the U. S. Military Academy,
and for Engineer Troops. By Capt. O. H.
Ernst, Corps of Engineers, Instructor in
Practical Military Engineering, U. S.
Military Academy. 193 wood-cuts and 3
lithographed plates. 12mo, cloth,

SIMMS. A TREATISE ON THE PRINCIPLES AND PRACTICE OF LEVELLING, showing its application to purposes of Railway Engineering and the Construction of Roads, etc. By Frederick W. Simms, C. E. From the fifth London edition, revised and corrected, with the addition of Mr. Law's Practical Examples for Setting-out Railway Curves. Illustrated with three lithographic plates, and numerous wood-cuts. 8vo, cloth,

JEFFERS. NAUTICAL SURVEYING. By William N. Jeffers, Captain U. S. Navy. Illustrated with 9 copperplates, and 31 wood-cut illustrations. 8vo, cloth,

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THE PLANE TABLE. ITS USES IN TOPOGRAPHI-
CAL SURVEYING. From the papers of the
U. S. Coast Survey. 8vo, cloth,

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A TEXT-BOOK ON SURVEYING, PROJECTIONS,
AND PORTABLE INSTRUMENTS, for the use
of the Cadet Midshipmen, at the U. S.
Naval Academy. 9 lithographed plates,
and several wood-cuts. 8vo, cloth,

CHAUVENET. NEW METHOD OF CORRECTING
LUNAR DISTANCES. By Wm. Chauvenet,
LL.D. 8vo, cloth,.

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BURT. KEY TO THE SOLAR COMPASS, and Sur-
veyor's Companion; comprising all the
Rules necessary for use in the Field.
W. A. Burt, U. S. Deputy Surveyor. Sec-
ond edition. Pocket-book form, tuck,
HOWARD. EARTHWORK MENSURATION ON THE
BASIS OF THE PRISMOIDAL FORMULE.
Containing simple and labor-saving meth-
od of obtaining Prismoidal Contents direct-
ly from End Areas. Illustrated by Exam-
ples, and accompanied by Plain Rules for
practical uses. By Conway R. Howard,
Civil Engineer, Richmond, Va. Illustrat-
ed. 8vo, cloth,

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MORRIS. EASY RULES FOR THE MEASUREMENT OF EARTHWORKS, by means of the Prismoidal Formulæ. By Elwood Morris, Civil Engineer. 78 illustrations. 8vo, cloth, 150 CLEVENGER. 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 U. S. Surveyors in the Field. By S. V. Clevenger, U. S. Deputy Surveyor. Illustrated. Pocket formu, morocco, gilt,

HEWSON. PRINCIPLES AND PRACTICE OF EMBANKING LANDS from River Floods, as applied to the Levees of the Mississipi. By William Hewson, Civil Engineer. 8vo, cloth,

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MINIFIE.

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A TEXT-BOOK OF GEOMETRICAL
DRAWING, for the use of Mechanics and
Schools. With Illustrations for Drawing
Plans, Elevations of Buildings and Ma-
chinery. With over 200 diagrams on steel.
By William Minifie, Architect. Ninth edi-
tion. Royal 8vo, cloth,

MINIFIE GEOMETRICAL DRAWING. Abridged
from the octavo edition, for the use of
Schools. Illustrated with 48 steel plates.
New edition, enlarged. 12mo, cloth,

FREE HAND DRAWING. A GUIDE TO ORNAMEN-
TAL, Figure, and Landscape Drawing. By
an Art Student. Profusely illustrated.
18mo, boards,

AXON. THE MECHANIC'S FRIEND. A Collec-
tion of Receipts and Practical Suggestions,
relating to Aquaria-Bronzing--Cements

-Drawing-Dyes-Electricity-Gilding-
Glass-working-Glues -- Horology-Lac-
quers-Locomotives-Magnetism - Metal-
working-Modelling - Photography-Py-
rotechny-Railways-Solders-Steam - En-
gine-Telegraphy-Taxidermy-Varnishes

-Waterproofing--and Miscellaneous Tools,
Instruments, Machines, and Processes
connected with the Chemical and Mechan-
ical Arts. By William E. Axon, M.R.S.L.
12mo, cloth. 300 illustrations,

HARRISON.

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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

JOYNSON. THE MECHANIC'S AND STUDENT'S GUIDE in the designing and Construction of General Machine Gearing. Edited by Francis H. Joynson. With 18 folded plates. 8vo, cloth

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RANDALL. QUARTZ OPERATOR'S HAND-BOOK. By P. M. Randall. New Edition. Revised and Enlarged. Fully illustrated. 12mo, cloth,

LORING. A HAND-BOOK ON THE ELECTRO-MAGNETIC TELEGRAPH. By A. E. Loring. 18mo, illustrated. Paper boards, 50 cents; cloth, 75 cents; morocco,

BARNES.

SUBMARINE WARFARE, DEFENSIVE
AND OFFENSIVE. Descriptions of the_va-
rious forms of Torpedoes, Submarine Bat-
teries and Torpedo Boats actually used in
War. Methods of Ignition by Machinery,
Contact Fuzes, and Electricity, and a full
account of experiments made to deter-
mine the Explosive Force of Gunpowder
under Water. Also a discussion of the Of-
fensive Torpedo system; its effect upon
Iron-clad Ship systems, and influence upon
future Naval Wars. By Lieut.-Com. John
S. Barnes, U. S. N. With 20 lithographic
plates and many wood-cuts. 8vo, cloth,

FOSTER. SUBMARINE BLASTING, in Boston
Harbor, Mass. Removal of Tower
and Corwin Rocks. By John G. Foster,
U. S. Eng. and Bvt. Major General U. S.
Army. With seven Plates. 4to, cloth,

PLYMPTON. THE ANEROID BAROMETER: Its
Construction and Use, compiled from several
sources. 16mo, boards, illustrated, 50 cents;
morocco,

WILLIAMSON. ON THE USE OF THE BAROME-
TER 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.
4to, cloth,

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WILLIAMSON. PRACTICAL TABLES IN METE OROLOGY AND HYPSOMETRY, in connection with the use of the Barometer By Col. R. S. Williamson, U. S. A. 4to, flexible cloth, $250 BUTLER. PROJECTILES AND RIFLED CANNON A Critical Discussion of the Principal Sys tems of Rifling and Projectiles, with Practical Suggestions for their Improvement. By Capt. John S. Butler, Ordnance Corps, U. S. A. 36 Plates. 4to, cloth,

BENET ELECTRO-BALLISTIC MACHINES, and the Schultz Chronoscope. By Lt.-Col S. V Benet, Chief of Ordnance U. S. A. Second edition, illustrated. 4to, cloth, 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,

NUGENT. ITEATISE 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,

PEIRCE. SYSTEM OF ANALYTIC MECHANICS. By Benjamin Peirce, Professor of Astronomy and Mathematics in Harvard University. 4to cloth,

CRAIG WEIGHTS AND MEASURES. An Account of the Decimal System, with Tables of Conversion for Commercial and Scientific Uses. By B. F. Craig, M. D. Square 32mo, limp cloth,

ALEXANDER.

UNIVERSAL DICTIONARY OF
WEIGHTS AND MEASURES, Ancient and
Modern, reduced to the standards of the
United States of America. By J. H. Alex-
an ler. New edition. 8vo, cloth,

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