PUTTY is a kind of cement composed of fine powdered chalk intimately mixed with linseed oil, either boiled or raw, to the consistency of a tough dough. It is principally used by glaziers for bedding and fixing sheets of glass in windows and other frames, by joiners and painters for filling up nail-holes and other inequalities in the surface of wood-work, and by masons for bedding ashlar-work. The oxidation of the oil gradually hardens putty into a very dense adherent mass. When putty is required to dry quickly, boiled oil and sometimes litharge and other driers are used. " Putty powder " or "polisher's putty " is oxide of tin in a state of fine division used for the polishing of glass, hard metals, granite, and similar substances.