Asphaltum forty-eight pounds, fuse, add boiled oil ten gallons, red lead and litharge of each seven pounds, dried and powdered white copperas three pounds, boil for two hours, then add dark gum amber (fused) eight pounds, hot linseed oil two gallons, boil for two hours longer, or till a little of the mass, when cooled, may be rolled into pills, then withdraw the heat, and afterwards thin down with oil of turpentine thirty gallons. Used for the ironwork of carriages, and other nice purposes.