44 
SALOON. 
Nat. Hist. 
ginous quartz, straight foliated barytes, &c. from 
Freiberg in the Brisgau, &c.— Arseniate of lead — 
Molybdate of lead, or yellow lead ore; massive, 
lamellifonn, and crystallized ; on compact lime¬ 
stone, &c. chiefly from Bleyberg in Carinthia. 
The specimens of chromate of lead, or red lead 
ore, deposited in this case, are particularly beauti¬ 
ful and instructive : the accompanying substances 
are green lead ore, and sometimes small greenish 
brown crystals of a substance (Yauqueilnite) now 
considered as being chromate of copper: the 
gangue stone, in which the red lead occurs in 
the gold mines of Beresof, is a kind of mica¬ 
ceous rock mixed with particles of quartz and 
brown iron-stone.— Murio-carbonate cj lead, or 
horn lead, the crystallized varieties of which have 
hitherto been observed in Derbyshire only. [An 
interesting suite of crystals of this scarce mineral 
substance will be found in the British Collection: 
Derbyshire.]— Sulphate of lead, called native lead- 
vitriol by Werner, crystallized and massive.— Lead 
earth, indurated and friable, of various colours; its 
different varieties appear to be related to carbonates, 
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 of the same from Siberia; 
all 
