on the "Manipulations
Hydroplastiques" of ALFRED ROSELEUR. By WILLIAM H. WAHL, Ph. D.
(Heid), Secretary of the Franklin Institute. Illustrated by 189
engravings. 8vo., 656 pages. $7.50

$WALTON.--Coal-Mining Described and Illustrated:$

By THOMAS H. WALTON, Mining Engineer. Illustrated by 24 large and
elaborate Plates, after Actual Workings and Apparatus. $5.00

$WARE.--The Sugar Beet.$

Including a History of the Beet Sugar Industry in Europe, Varieties
of the Sugar Beet, Examination, Soils, Tillage, Seeds and Sowing,
Yield and Cost of Cultivation, Harvesting, Transportation,
Conservation, Feeding Qualities of the Beet and of the Pulp, etc.
By LEWIS S. WARE, C.E., M.E. Illustrated by ninety engravings. 8vo.
$4.00

$WARN.--The Sheet-Metal Worker's Instructor:$

For Zinc, Sheet-Iron, Copper, and Tin-Plate Workers, etc.
Containing a selection of Geometrical Problems; also, Practical and
Simple Rules for Describing the various Patterns required in the
different branches of the above Trades. By REUBEN H. WARN,
Practical Tin-Plate Worker. To which is added an Appendix,
containing Instructions for Boiler-Making, Mensuration of Surfaces
and Solids, Rules for Calculating the Weights of different Figures
of Iron and Steel, Tables of the Weights of Iron, Steel, etc.
Illustrated by thirty-two Plates and thirty-seven Wood Engravings.
8vo. $3.00.

$WARNER.--New Theorems, Tables, and Diagrams, for the Computation
of Earth-work:$

Designed for the use of Engineers in Preliminary and Final
Estimates, of Students in Engineering, and of Contractors and other
non-professional Computers. In two parts, with an Appendix. Part I.
A Practical Treatise; Part II. A Theoretical Treatise, and the
Appendix. Containing Notes to the Rules and Examples of Part I.;
Explanations of the Construction of Scales, Tables, and Diagrams,
and a Treatise upon Equivalent Square Bases and Equivalent Level
Heights. The whole illustrated by numerous original engravings,
comprising explanatory cuts for Definitions and Problems,
Stereometric Scales and Diagrams, and a series of Lithographic
Drawings from Models: Showing all the Combinations of Solid Forms
which occur in Railroad Excavations and Embankments. By JOHN
WARNER, A.M., Mining and Mechanical Engineer. Illustrated by 14
Plates. A new, revised and improved edition. 8vo. $4.00

$WATSON.--A Manual of the Hand-Lathe:$

Comprising Concise Directions for Working Metals of all kinds,
Ivory, Bone and