August 30, 1918. THE COLLIERY GUARDIAN. 431 By Tests The Best RESULT OF LATEST TRIAL INCREASE IN EVAPORATION “SINGLE HOOD” i’j “PERFECTA” BOILER CIRCULATOR Ltd., 39, Victoria Street, LONDON, S.W. 1. TANGYES THREE-THROW RAM PUMP For Mining Purposes, Town's Water Supply, &c. With BELT PULLEYS for driving by “SUCTION” GAS ENGINE, OIL ENGINE, STEAM ENGINE, or with ELECTRIC MOTOR. Fitted with OUTSIDE VALVE SPRINGS for HIGH SPEEDS. Quotations on receipt of particulars of the duty. TANGYES LIP BIRMINGHAM. No. 408 D