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Plumbers' Cement

Melt 1 resin, then stir in 1 to 2 pounds Sometimes a little tallow is 2219. Cheap Artificial Building square stones, put together, while dry, with Stone. A large number of houses have been this cement, will never leak or require repair. constructed in Paris, for workmen, of the fol- It is only necessary to use it for an inch or lowing materials: 100 parts plaster of Paris, two next the water; the rest of the joint 10 parts hydraulic lime, 5 parts liquid glue, may be filled with good mortar. It is better, and 500 parts cold water, are intimately mixed and poured into moulds of any desired size and shape; and in half an hour the form can be removed. The stones are then exposed in pound black the open air for 2 weeks, until they are thor- brick -dust. oughly dry. Artificial stone thus prepared, added. has the ring and hardness of the native rock; and, where the materials are abundant, is said to be 25 per cent. cheaper than quarried stone.