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Incrustations

The following substances have been used, with more or less success, in preventing and removing the incrustations which are formed by using hard water:- Krause's Anti-incrustation Powder for Steam Boilers.

Powdered charcoal, sal soda, alum, each 1 lb. sawdust, 8 lbs. Mix. Most of the secret incrus- Gun-cotton, carefully prepared, is scarcely acted on by the most energetic chemical agents at ordi- | tation powders sold are but modifications of this. Potatoes.