19.—Cerussite.
Occurs in crystals, in powder or masses; glassy lustre; brittle; dissolves in nitric acid with effervescence; heated strongly on charcoal crackles and fuses, giving a globule of lead; gravity 6.4.
Value.—A rich ore of lead yielding seventy-five per cent.
Localities.—Found in lead mines. Southampton, Mass.; Perkiomen, Phœnixville, Charlestown and Schuylkill, Pa.; Wythe County, Va.; Washington Mine, N. C.; Valle’s Diggings, Mine-la-Motte and Mine-a-Burton, Mo.; Davies and Rock Counties, Ill.; Blue Mounds, Wis.; Ingo County, Cal.