Metals And Materials.

Flather (181.) 1V, J. Flather, Ltd., of the Standard Steel Works, Sheffield, is, of course, best known for its " Ubas " brand of steel for case-hardening : it shows a fine range......

Components, Engines, Gears, And Tools.

Aster (201.) The Aster Engineering Co., Ltd., of 4, Prince's Street, Hanover Square, W., has, as usual, a fine display of the various types of engines and details which it......