45 
of zinc in this case are those of a sparry appear- saloon. 
ancc,commonly called calamme^ which constitute Nat - Hist * 
three different species, mx the electric or siliceous 
calamine, in a variety of which the presence of 
cadmium has been announced by the late Dr. 
Clarke; the common calamine, or native carbo¬ 
nate of zinc; and the red oocide of zinc: the speci¬ 
mens of the two former species include various 
crystalline and other forms, among which are 
the pseudomorphous crystals of carbonate of 
zinc, derived from modifications of calcareous 
spar. 
Case 45. Ores of tin, of which we have the 
sulphuret of tin, or tin pyrites, and the oxides, 
which are divided into common tin stone, and 
wood tin :— tin pyrites , hitherto only found in 
Cornwall, nearly pure, mixed with proper py¬ 
rites, &c.among the specimens of common tin 
stone are, the regular and macled crystals, the 
pebble-like and granular tin stone (shoad tin, 
stream tin, grain tin, &c.), and the greyish-white 
crystals, resembling scheel ore, or tunsgate of 
lime; the tin stone from Finbo, in Sweden, 
which contains oxide of tantalum.—The ores of 
tungsten, which frequently accompany those of 
tin,are—wo//r<m(scheelin ferrugineux ofHaiiy), 
crystallized and massive, from Bohemia, &c. and 
the tungstate of lime , scheel ore (scheelin calcaire 
of Haiiy), among the crystallized specimens of 
which is the primitive acute octahedron from 
Allemont in Dauphine.—In this case are also 
placed 
