Dissolve 8 ounces of birdlime in 8 ounces of boiled linseed oil. Boil un til the birdlime ceases to crackle, Add 12 ounces of boiled oil and 2 ounces of litharge, and boil until it becomes stringy. Cool, and add 12 ounces of turpentine. Apply while warm.
Or dissolve ounce of India rub ber cut fine in 1 pound of mineral naphtha. Cover the vessel and melt with gentle heat until it dissolves. Strain through cheese cloth.
Or cut fine ounce of India rub ber, pour over this 1 pint of boiled linseed oil, and dissolve with gen tle heat, stirring constantly. Strain through cheese cloth.
Or raise to a boil 2 quarts of boiled linseed oil, stirring in 1 ounces of white copperas, I ounces of sugar of lead, and 4 ounces of litharge. Boil until stringy. Allow to cool slowly and pour off the clear liquid.
Or take 1 gallon of boiled linseed oil, and dissolve 4 ounces of pure asphaltum with gentle heat in a small amount of the oil. Grind 3 ounces of burnt umber in a little of the oil. Add the remainder of the oil, boil until stringy, cool, and thin with oil of turpentine.
Black Asphalt Varnish for Iron work.—Dissolve 3 pounds of asphalt in 4 pounds of boiled linseed oil. Re move from the fire and thin with 15 to 18 pounds of oil of turpentine.
Or boil 22i pounds of foreign asphalt in 3 gallons of linseed oil. Add 3 pounds of litharge. Boil un til stringy, then add 4 pounds of melted gum amber and 1 gallon of linseed oil. Bring to a boil, remove from the fire, and thin with 22 gal lons of turpentine.
India rubber or gutta percha may be added to any common oil varnish if desired to impart additional flexi bility.
Or melt 12 pounds of asphaltum, add 21. gallons of boiled linseed oil, 2i pounds of red lead, 2} pounds of litharge, and 1 pound of dry and pow dered white copperas. Boil 2 hours, add 9§ pounds of dark gum amber melted and gallon of hot linseed oil. Boil 2 hours. To test, take out a few drops and allow to cool on a glass plate, When boiled sufficiently, it may be rolled into pills. Remove from the fire and thin with 10 gal lons of oil of turpentine. This is suitable for varnishing the best grades of ironwork.
Or to pint of boiled' linseed oil add 6 ounces of powdered asphaltum. Bring to a boil and stir in 1 pound of melted amber. Cool, and add 1 pint of oil of turpentine.
Or dissolve 8 ounces of asphaltum and 4 ounces of rosin in 1 pint of oil of turpentine. Rub up 2 ounces of lampblack to a paste with boiled lin seed oil and stir into the mixture. The above are suitable for iron fences or hinges exposed to the weather, or for iron shovels, tools, coal scuttles, and other sheet-iron or cast-iron sur faces to protect them from rust and to give them a good appearance.
Or melt 4 pounds of asphalt and add 1 quart of boiled linseed oil and 1 gallon of oil of turpentine. This is suitable for and other rough cast-iron surfaces.
Or melt 2f pounds of asphaltum and add 1 gallon of turpentine. When cool, add 1 pint of copal varnish and 1 pint of boiled linseed oil. This is black varnish for wood or canvas.