COAL-CUTTING MACHINERY. By G. E. F. Eagar, M.Inst.Min.E.
GRINDING MACHINES AND THEIR USE. By T. R. Shaw, M.I.Mech.E.
ELECTRO-DEPOSITION OF COPPER. By C. W. Denny, A.M.I.E.E.
DIRECTIVE WIRELESS TELEGRAPHY. By L. H. Walter, M.A.
TESTING OF CONTINUOUS-CURRENT MACHINES. By C. F. Smith, D.Sc., M.I.E.E.
ELECTRICAL TRANSMISSION OF ENERGY. By W. M. Thornton, D.Sc.
STEAM ENGINE VALVES AND VALVE GEAR. By E. L. Ahrons, M.I.Mech.E.
MECHANICAL HANDLING OF GOODS. By C. H. Woodfield.
INDUSTRIAL AND POWER ALCOHOL. By R. C. Farmer, D.Sc.
POSITION AND DIRECTION FINDING. By L. H. Walter, M.A., A.M.I.E.E.