Elaborate Equipment Designed To Test Proprietary Units...

By L. J. COTTON, M.I.R.T.E. Because of reflection or absorption of sound by surrounding objects, noise measurement is one of the most difficult laboratory tasks, and usually the......

New G.m.c. Range With Two-stroke Engine

G REATER economy in heavy haulage is made possible by the introduction of two new series of tractive units by the G.M.C. truck and coach division of the General Motors......