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May, 1913 THE MARINE RE VIEW 187 It will do the same for you Scale removed from a water heater by USGCO'S MEXICAN BOILER GRAPHITE This Did It USGC worn O'S Mexican Boiler Graphite A New Weapon that has an old fight--THE FIGHT AGAINST SCALE. For Years and tens of years Engineers have been fighting scale--- Fighting is hard---trying first one method of "preventing"' scale then another---but never actually getting the upper hand. --then came Mexican Boiler Graphite and the fight was won--Boiler Scale worries were ended -- Boiler Cleaning Made Easy. --MEXICAN -BOILER GRAPHITE does its work by a gently mechanical action--is effective in any feed water re- gardless of its character, and unlike '"'chemicals'? or com- pounds does not attack or "pit" the steel of a boiler. / --a gain acting mechanically not chemically it cannot cause "foaming" and being insoluble will not under normal conditions pass froma boiler with the steam. --furthermore, MEXICAN BOILER GRAPHITE will keep your boilers free from that hard scale, so dificult to remove, and at half the usual cost. | --It is the ideal scale remedy --you've waited years for it, now it's here---Thousands of Engin- eers are using it today--Thou-. sands more will use it before another year has passed--will you be one of them? --If it delivers the goods--lives up to our claims--you ought to be using it today--Then why not investigate. Begin now--Write for our booklet H. THE MANAGEMENT AND CLEANING OF STEAM BOILERS--ask for testimonials and full particulars. The United York, 30 Church St. -- pillsdsipbis, 1822 Land Title Bldg. Pittsburgh, Fulton Bldg. Chicago, 630 Railway Exchange States Graphite Company. Mines--Near Torres, Sonora, Mexico Main Offices and Factory: Saginaw, Mich., U.SiA,. BRANCH OFFICES Denver, 606 Gas & Electric Bldg. London, Eng., 118 Holborn St., E. C. San Francisco, 669 Phelan Bldg. Fuerth, Bavaria, Germany Detroit, 307 Free Press Bldg. Berlin, Germany, 26 Burgstrasse Cleveland. 1111 Superior Viaduct