44 
SALOON, particlesofquartzandbrown iron-stone.— 
Nat. Hist, carbonate of lead^ or horn-lead, the crystallized 
varieties of which have hitherto been observed in 
Derbyshire only. [An interesting suite of crys¬ 
tals of this scarce mineral substance will be 
found in the British Collection: Derbyshire.] 
—Sulphate cf lead, called native lead-vitriol by 
Werner, crystallized and massive.— Lead earthy 
indurated and friable, of various colours ; its dif¬ 
ferent varieties appear to be related to carbo¬ 
nates, phosphates, and sulphates of lead: to which 
latter also the reniform lead ore (blei-niere of 
Werner) from Siberia appears to belong: some 
varieties of lead earth are oxides. Near to these 
is also placed the native minium^ from Hessia, 
first described by Mr, Smithson, and varieties oi* 
the same from Siberia; all of them probably 
produced by the decay of galena. 
Case 44. Ores of zinc. Among the many va¬ 
rieties of sulpJiuret of zinc ^ or blende, may be par¬ 
ticularized those relative to colour, viz, the yel¬ 
low, the brown, and the black blende of Werner; 
the first of which is generally most pure, while 
the two others contain a portion of iron ; the fi¬ 
brous blende of Przbram in Bohemia, in which the 
cadmium was discovered by Stromeyer; the va¬ 
riety called testaceous blende (schaalen-blende), 
the most characteristic specimens of wljich 
are from Geroldseck in the Brisgau, contains, 
besides iron, a portion of lead.—The other ores 
of 
