A NEW COMPOUND FOR HARDENING WALLS.
A patent has been granted for a waterproof compound adapted to be applied to the floors and walls of buildings to prevent the access of water and dampness, and which will also withstand extreme and varying temperature of air, and which will be practically indestructible. The composition consists of the following ingredients, combined in substantially the proportions stated, viz.: New Zealand (or Portland) cement, 100 pounds ; cream of tartar, 3 ounces ; pulverized ivory, I ounce ; quicksilver, 1 ounce; isinglass, 4 ounces ; marble dust, 5 pounds; sand, 200 pounds ; rain water, 1 pail. In compounding the ingredients a small quantity of cement, for instance, 1 pound, is mixed with the cream of tartar, quicksilver and isinglass and water enough to make a very thin paste, and the composition is let stand about twenty-four hours.
If the weather be cold the composition should stand in a warm place. The remainder of the cement, the pulverized ivory, marble dust and sand are mixed dry, and the standing compound is thereupon added, together with enough rain water, about half a pail, to produce a plastic mass capable of being readily laid with a trowel or similar implement. After the compound is laid upon a suitable foundation, such as wood, earth, brick or metal, it is said to become very hard, equal to steel, and capable of a very high polish.
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