52 PREPARATION FOR REMOVING CARBON, SOOT, AND SCALE FROM FURNACES, STOVES, AND CHIMNEYS BY SPRINKLING THE PREPARATION DIRECTLY ON THE HOT COALS OR IN THE FIRE BOX OF OIL BURNERS, A CHEMICAL ACTION TAKING PLACE
NO CLAIM IS MADE TO THE WORD "KLEN" APART FROM THE MARK AS SHOWN. THE DRAWING IS LINED FOR ORANGE GLOW-CLEAN