BAIRD.—Miscellaneous Papers on Economic Questions. By Henry Carey Baird. (In preparation.)

BAIRD.—The American Cotton Spinner, and Manager's and Carder's Guide:

A Practical Treatise on Cotton Spinning; giving the Dimensions and
Speed of Machinery, Draught and Twist Calculations, etc.; with
notices of recent Improvements: together with Rules and Examples
for making changes in the sizes and numbers of Roving and Yarn.
Compiled from the papers of the late Robert H. Baird. 12mo.
$1.50

BAIRD.—Standard Wages Computing Tables:

An Improvement in all 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 Construction; with numerous Formulæ and Tables. By B. Baker. 12mo. $1.50

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: