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Nearly White Table Glass

Take 20 pounds potashes, 11 pounds dry Glauber salts, 16 pounds soaper salt, 55 pounds sand, and 140 pounds cullet or broken glass of the same kind. Or: 100 parts sand , 235 kelp, 60 wood ashes, 14 manganese, 100 broken glass. lass. This is a compound of silica (silicic acid) with the oxide of an alkaline metal, obtained by fusion. In its usual form it is brittle, transparent, non-crystalline, insolu-