Or mix equal quantities of sifted peroxide of manganese and powdered zinc white, and make into a thin paste with soluble glass. Apply immedi ately.
Or mix 5 ounces of fire clay, 3 ounces of manganese, and 3 ounces of silicate of soda with water to the con sistency of putty. Used to mend holes in castings and for similar purposes.
Or mix 10 ounces of clay, 3 ounces of manganese, 2 ounces of silicate of soda, and it ounce of asbestos. Grind to powder in a mortar, mix with water to make a paste, and use as mortar for lining stoves.
Compound Glues.—The number of pastes, glues, and cements that can be compounded by mixing various pro portions of the above substances is, of course, numberless, but the follow ing preparations are especially recom mended as having given satisfaction: For liquid glue, dissolve in a double boiler 8 ounces of white glue and 2 ounces of dry white lead in 1 pint of soft water. When dissolved, add 2 ounces of alcohol and stir briskly. Remove from the fire and bottle while hot.
Or dissolve in a double boiler 8 ounces of best white glue and 5 ounces of gum arabic in 1 pint of soft water. Add slowly 5 ounces of strong nitric acid, stirring constantly, and allow to cool. Bottle and cork tightly, put ting a few cloves in each bottle as a preservative.
On dissolve with gentle heat in a double boiler 1 pound of best white glue and 2 ounces of isinglass in 1 quart of soft water. Stir in 6 ounces of white lead. Add 2 ounces of white varnish dissolved in / pint of alcohol, mixing the whole with gentle heat. This is an heroic mixture which ought to be capable of withstanding almost anything.
Or mix equal quantities of common glue and isinglass, and cover with al cohol. Let stand twenty-four hours. Melt the whole with gentle heat.
Compound Marine Glue.—Dissolve / ounce of sandarac and ounce of mastic in 8 fluid ounces of 95 per cent alcohol. Add / ounce of oil of turpentine. Prepare separately in a double boiler a solution of 1 ounce of isinglass and 3 ounces of best white glue in I pint of water. Mix the two solutions and strain while very hot through cheese cloth. This glue
is a quick dryer and hardens under water.
Compound Cements.—Dissolve in a double boiler 8 ounces of isinglass in 1 pint of soft water. Stir in 2 ounces of dry white lead and boil until stringy. Cool slightly, and add 3 ounces of alcohol. Bottle while warm and cork tightly.
Or mix equal quantities of best white glue and isinglass broken fine, and cover with alcohol. Let stand twenty four hours. Melt with gentle heat in a double boiler and stir in sufficient powdered chalk to make a soft ce ment.
Or dissolve 10 grains of mastic in 2 drams of alcohol. Add 1 ounce of isinglass dissolved in 1 ounce of brandy and 10 grains of gum am moniac. Dissolve with gentle heat; bottle and cork tightly. Set the bot tle in hot water when wanted.
Or dissolve / ounce of isinglass and 1 ounce of white glue in 15 ounces of water. Strain through cheese cloth and evaporate with gentle heat to 3 ounces. Add 16 grains of mastic dis solved in / ounce of alcohol and 1 ounce of zinc white. Shake well be fore using.
Special Adhesives—Wood Cement. —Mix 1 ounce of lime and 2 ounces of rye meal with boiled linseed oil to a stiff paste.
Or dissolve 1 ounce of glue in 16 ounces of water, and stir in sawdust or prepared chalk or both to make a paste.
Or thicken oil varnish with equal parts of white lead, red lead, litharge, and powdered chalk. Use these ce ments to fill cracks and defects in woodwork before painting.
Or mix 2 ounces of beeswax, 2 ounces of shellac, and 1 ounce of In dian red, and color with yellow ocher to the shade required. Use this cement to fill cracks, cover nail heads, and the like in mahogany furniture.
Cement for Glass. — Dissolve best white glue in as little water as possi ble, and add by bulk one half as much linseed oil varnish and one fourth as much pure turpentine. Boil together in a double boiler closely covered to keep in the steam. Apply to glass and metal joints, holding the two sur faces together with a vise if conven ient or under weights for forty-eight hours until the cement sets.