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STBOSTTIAXITE. 569 I Carbon, ox. lead . . — — — — 3-86 Carbon, ox. copper . — — lied ox. iron ... — ■— Water 0'60 o-ie i Tc I I 0-19 0-11 — 0’17 0-33 m 2-19 0'16 A fibrous variety from Dufton in Cumberland (satin spar) contains 4’25 per cent, of carbonate of protoxide of manganese. The aragonite deposited by the hot springs at Carlsbad (sprudelstein) consists, according to Berzelius, of—carbonate of lime 97-00, carbonate of strontian 0-32, fluoride of calcium 0'69, phosphates of lime, alumina and oxide of iron 0 4 69, water 1'40. In attached and imbedded crystals, fibrous and compact masses, in globular and coralloid shapes having a drusy surface. Is found in gypsum at Molina in Aragon and Mingranilla in Valencia, at Bastenes near Bax in the Landes, in basaltic rocks the mountain of Cziczow near Ilorschnetz, near Tschopau, Toplitz, Kolosoruk and Waltsch in Bohemia, the Eifel, the Kai- serstulil in Baden, Hofgeismar in Ilessia, on the Blaue Kuppe near Eschwege, in many places in Auvergne, Leogang in Salz burg, Palkcnstein near Schwatz, and other places in the Tyrol, Herrengrund in Hungary, Nertschinsk in Siberia, Greenland; m beds of brown iron ore at Saalfeld and Kamsdorf in Thu ringia, tho Harz, Stiria; in Serpentine in the valley of St. Nicholas in Piedmont; in the lavas of Vesuvius and Iceland; m the matter deposited by the hot springs of Carlsbad; fibrous nnd massive at Bufton in Cumberland. The coralloid varieties nro found at Eisencrz in Stiria, Hiittenberg in Carinthia, Hungary, Transylvania, Devonshire, Buckinghamshire, at Lead- hills, and on the coast of Galloway in Scotland. When carbonate of lime crystallizes from its solution in Water containing carbonic acid, at the temperature of boiling water, or is precipitated by pouring a boiling hot solution of chloride of calcium into a solution of carbonate of ammonia, also boiling hot, it takes the form of aragonite. The specific gravity of the precipitate = 2’949. When it crystallizes from a solution at the ordinary temperature of the atmosphere, or from fusion, it takes the form of calcite. The specific gravity of a crystal of aragonite is reduced by ignition to that of calcite. . 403. STHOXTIANITE.—Strontianitc ; Phillips. Stron- tiane carbonatee; Hauy. Peritomer Hal-Baryt; Mohs. Stron- tiauit; Hausmann, Ilaidinger. Prismatic. 011,010=40° 6'; 101,001=36° 54'; 110,100=68° 39' a 100, C 001, t 012, h 101, I 302, i 201, z 401,