DAVIES.—A Treatise on Metalliferous Minerals and Mining: By D.C. Davies, F.G.S., Mining Engineer, Examiner of Mines, Quarries and Collieries. Illustrated by 148 engravings of Geological Formations, Mining Operations and Machinery, drawn from the practice of all parts of the world. 2d Edition, 12mo., 450 pages. $5.00

DAVIES.—A Treatise on Slate and Slate Quarrying:

Scientific, Practical and Commercial. By D.C. Davies, F.G.S., Mining Engineer, etc. With numerous illustrations and folding plates. 12mo. $2.50

DAVIS.—A Practical Treatise on the Manufacture of Bricks, Tiles, Terra-Cotta, etc.:

Including Common, Pressed, Ornamentally Shaped, and Enamelled Bricks, Drain-Tiles, Straight and Curved Sewer-Pipes, Fire-Clays, Fire-Bricks, Terra-Cotta, Roofing-Tiles, Flooring-Tiles, Art-Tiles, Mosaic Plates, and Imitation of Intarsia or Inlaid Surfaces; comprising every important Product of Clay employed in Architecture, Engineering, the Blast-Furnace, for Retorts, etc., with a History and the Actual Processes in Handling, Disintegrating, Tempering, and Moulding the Clay into Shape, Drying Naturally and Artificially, Setting and Burning, Enamelling in Polychrome Colors, Composition and Application of Glazes, etc.; including Full Detailed Descriptions of the most modern Machines, Tools, Kilns, and Kiln-Roofs used. By Charles Thomas Davis. Illustrated by 228 Engravings and 6 Plates. 8vo., 472 pages $5.00

DAVIS.—The Manufacture of Leather:

Being a description of all of the Processes for the Tanning, Tawing, Currying, Finishing and Dyeing of every kind of Leather; including the various Raw Materials and the Methods for Determining their Values; the Tools, Machines, and all Details of Importance connected with an Intelligent and Profitable Prosecution of the Art, with Special Reference to the Best American Practice. To which are added Complete Lists of all American Patents for Materials, Processes, Tools, and Machines for Tanning, Currying, etc. By Charles Thomas Davis. Illustrated by 302 engravings and 12 Samples of Dyed Leathers. One vol., 8vo., 824 pages $10.00

DAWIDOWSKY—BRANNT.—A Practical Treatise on the Raw Materials and Fabrication of Glue, Gelatine, Gelatine Veneers and Foils, Isinglass, Cements, Pastes, Mucilages, etc.:

Based upon Actual Experience. By F. Dawidowsky, Technical Chemist. Translated from the German, with extensive additions, including a description of the most Recent American Processes, by William T. Brannt, Graduate of the Royal Agricultural College of Eldena, Prussia. 35 Engravings. 12mo. $2.50

DE GRAFF.—The Geometrical Stair-Builders' Guide: