A Scheme To Use Steam

Bolsover-Rodgers System for Converting Petrol Engines to Run on Steam Raised in a Coal or Coke-fired Boiler, by Replacing a Part Of . the Existing Cylinder Head by a Suitable......

Calculator For Electric Welders

WELDERS, using electric equipVi' ment, will find their work facilitated by a handy gadget that has just been produced by Philips Industrial (Philips Lamps, Ltd.), Century House,......