March 15, 1918. THE COLLIERY GUARDIAN. 527 By Tests The Best INCREASE IN EVAPORATION “PERFECTA” BOILER CIRCULATOR Ltd., 39, Victoria Street, LONDON, S.W. 1. TANGLES THREE-THROW (WVWiHT ♦ kA ‘ J J 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