former Methods of Computation, so arranged that
wages for days, hours, or fractions of hours, at a specified rate per
day or hour, may be ascertained at a glance. By T. SPANGLER BAIRD.
Oblong folio $5.00

$BAKER.--Long-Span Railway Bridges:$

Composing Investigations of the Comparative Theoretical and Practical
Advantages of the various Adopted or Proposed Type Systems of
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$BAKER.--The Mathematical Theory of the Steam-Engine:$

With Rules at length, and Examples worked out for the use of Practical
Men. By T. BAKER, C.E., with numerous Diagrams. Sixth Edition, Revised
by Prof. J.R. YOUNG. 12mo. $75.00

$BARLOW.--The History and Principles of Weaving, by Hand and by Power:$

Reprinted, with Considerable Additions, from "Engineering," with a
chapter on Lace-making Machinery, reprinted from the Journal of the
"Society of Arts." By ALFRED BARLOW. With several hundred illustrations.
8vo., 443 pages $10.00

$BARR.--A Practical Treatise on the Combustion of Coal:$

Including descriptions of various mechanical devices for the Economic
Generation of Heat by the Combustion of Fuel, whether solid, liquid or
gaseous. 8vo. $2.50

$BARR.--A Practical Treatise on High Pressure Steam Boilers:$

Including Results of Recent Experimental Tests of Boiler Materials,
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Illustrations. 8vo. $3.00

$BAUERMAN.--A Treatise on the Metallurgy of Iron:$

Containing Outlines of the History of Iron Manufacture, Methods of
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Steel, etc., etc. By H. BAUERMAN, F.G.S., Associate of the Royal School
of Mines. Fifth Edition, Revised and Enlarged. Illustrated with numerous
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$BAYLES.--House Drainage and Water Service:$

In Cities, Villages and Rural Neighborhoods. With Incidental
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$BEANS.--A Treatise on Railway Curves and Location of Railroads:$

By E.W. BEANS, C.E. Illustrated. 12mo. Tucks $1.50

$BECKETT.--A Rudimentary Treatise on Clocks, and Watches and Bells:$

By Sir EDMUND BECKETT, Bart., LL. D., Q.C.F.R.A.S. With numerou