roughly revised, with much
additional matter. 12mo. 414 pages $2.00

$EDWARDS.--Modern American Locomotive Engines,$

Their Design, Construction and Management. By EMORY EDWARDS.
Illustrated 12mo. $2.00

$EDWARDS.--Modern American Marine Engines, Boilers, and Screw
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Their Design and Construction. Showing the Present Practice of the
most Eminent Engineers and Marine Engine Builders in the United
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$EDWARDS.--The Practical Steam Engineer's Guide$

In the Design, Construction, and Management of American Stationary,
Portable, and Steam Fire Engines, Steam Pumps, Boilers, Injectors,
Governors, Indicators, Pistons and Rings, Safety Valves and Steam
Gauges. For the use of Engineers, Firemen, and Steam Users. By
EMORY EDWARDS. Illustrated by 119 engravings. 420 pages. 12mo.
$2.50

$ELDER.--Conversations on the Principal Subjects of Political
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By Dr. WILLIAM ELDER. 8vo. $2.50

$ELDER.--Questions of the Day$,

Economic and Social. By Dr. WILLIAM ELDER. 8vo. $3.00

$ELDER.--Memoir of Henry C. Carey.$

By Dr. WILLIAM ELDER. 8vo. cloth. $.75

$ERNI.--Mineralogy Simplified.$

Easy Methods of Determining and Classifying Minerals, including
Ores, by means of the Blowpipe, and by Humid Chemical Analysis,
based on Professor von Kobell's Tables for the Determination of
Minerals, with an Introduction to Modern Chemistry. By HENRY ERNI,
A.M., M.D., Professor of Chemistry. Second Edition, rewritten,
enlarged and improved. 12mo. $3.00

$FAIRBAIRN.--The Principles of Mechanism and Machinery of
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Comprising the Principles of Mechanism, Wheels, and Pulleys,
Strength and Proportions of Shafts, Coupling of Shafts, and
Engaging and Disengaging Gear. By SIR WILLIAM FAIRBAIRN, Bait. C.E.
Beautifully illustrated by over 150 wood-cuts. In one volume, 12mo.
$2.50

$FITCH.--Bessemer Steel$,

Ores and Methods, New Facts and Statistics Relating to the Types of
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employed, and the Character and Availability of the Ores utilized
in the Manufacture of Bessemer Steel in Europe and in the United
States; together with opinions and excerpts from various accepted
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$FLEMING.--Narrow Gauge Railways in America.$

A Sketch of their Rise, Progress, and Success. Valuable Statistics
as to Grades, Curves, Weight of Rai