Limestone. 4 79 lent I fhall only remark, that it is almofl entirely confined to the floetz mountains. Geographic Situation. It occurs in the fandftone and coal formations of Saxony, Bohemia, Bavaria, Sweden, France, Lug- land, Scotland, &c. Ufe. It is frequently ufed for building and the making of roads. .When by burning it is deprived of its ^atcr and carbonic acid, it is ufed for mortar, and in this ftate it is alfo employed by the foap-maker, the ta nner, and the farmer; it is alfovery often ufed as a flux, in the reduction of fuch ores as are diffi cultly fufible, by reafon of an intermixture of filica an d alumina. 1 he florentine arborefcent marble, which is a va- rie ty of this kind, is valued for ornamental purpofes ; an d the limeflipne of Pappenheim, when it rifes in thick tables, ferves for paving (tones, grave flones, and becaufe it does not alter its fhape, it is fometirnes eitl ployed in the polifhing of plate glafs for mirrors. Qbfervatim.