48 
SALOON. 
Nat, Hist, 
particularized those relative to colour* viz. the 
yellow, the brown, and the black blende of Wer¬ 
ner ; the first of which is generally most pure, 
while the two others contain a portion of iron ; 
the variety called testaceous blende (schaalen 
blende), the most characteristic specimens of 
which are from Geroldseck in the Brisgau, con¬ 
tains, besides iron, a portion of lead.—The other 
ores of zinc in this case are those of a sparry 
appearance, commonly called calamine, which 
Mr, Smithson has ascertained to constitute three 
different species, viz. the electric or quartzy cala¬ 
mine, which becomes strongly electric by heat; 
the common calamine, or native carbonate of 
zinc; and the hydrous carbonate of zinc: the 
specimens of the two former species include 
various crystalline and other forms, among 
which are the pseudomorphous crystals of car¬ 
bonate of zinc, derived from modifications of 
calcareous spar. 
(Case sj.) 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 
copper pyrites, &c. ;—among the specimens of 
common tin stone are, the regular and macled 
crystals, 
