the Text. Royal 8vo., 36s.

UNWIN.—Works by WILLIAM CAWTHORNE UNWIN, F.R.S., B.S.C.

THE TESTING OF MATERIALS OF CONSTRUCTION.

Embracing the description of Testing Machinery and Apparatus Auxiliary to Mechanical Testing, and an Account of the most Important Researches on the Strength of Materials. With 141 Woodcuts and 5 Folding-out Plates.

8vo., 21s.

ON THE DEVELOPMENT AND TRANSMISSION OF POWER FROM CENTRAL STATIONS: being the Howard Lectures delivered at the Society of Arts in 1893.

With 81 Diagrams. 8vo., 10s. net.

• WARREN.—ENGINEERING CONSTRUCTION IN IRON, STEEL, AND TIMBER. By William Henry Warren, Challis Professor of Civil and Mechanical Engineering, University of Sydney. With 13 Folding Plates, and 375 Diagrams. Royal 8vo., 16s. net.

MACHINE DRAWING AND DESIGN.

LOW AND BEVIS.—A MANUAL OF MACHINE DRAWING AND DESIGN. By David Allan Low (Whitworth Scholar), M.I.Mech.E., Professor of Engineering, East London Technical College, People's Palace, London; and Alfred William Bevis (Whitworth Scholar), M.I.Mech.E., Director of Manual Training to the Birmingham School Board.