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3 iff METALLIC SALTS. Ditt*. 21.739 6.522 71.739 100 Ilerz. Archly, b. iii. s. 537. Geognostic and Geographic Situations. It occurs In mineral repositories that contain blende, and dppears to be formed by the decomposition of that ore. It occurs at Holywell in Flintshire ; and it is said also in Cornwall: in the Itammelsberg in the Hartz ; at Spitz in Austria ; at Scliemnitz in Hungary ; and Sahl- bcrg in Sweden. tJse.s, It is used as a medicine ; is employed in great quanti ties by varnishers to make oil drying; and a fine white colour named Zinc-white, which is more durable than white-lead, is prepared from it. To prepare this colour, the salt is dissolved in water, and the white oxide, which is the zinc-white, is precipitated from it by means of potash or chalk. Constituent Parts. From Rammelberg, Oxide of Zinc, . 27.5 Oxide of Manganese, 0.5 Sulphuric Acid, - 22.01 Water, - . . 50.0 i 100.0 Klaproth, Beit. b. v. s. 196. Genus 1^*