OCR Text |
Show USES OF FELDSPAR. The feldspar quarrjes In the United States, with the exception of those in California, are restricted to nine of the eastern seaboard states. Most of the feldspar mined in the eastern states Is of the potash or the soda variety va-riety or a mixture of the two, and these varieties are used in the pottery Industry because after being melted and cooled they form a glass Feldspar Feld-spar of the lower grade Is used as a binder in making emery and corundum corun-dum wheels, in manufacturing opalescent opales-cent glass, as a poultry grit, as a constituent con-stituent of roofing material, and for surfacing concrete work. Small quan-titles quan-titles of tho purest grades of potach feldspar are used In the monufacture of artificial teeth. nrt |