44 
SALOON, and orange ^ with ferruginous quartz, straight- 
Nat. Hist, foliated, heavy-spar, &c. from Freiberg in the 
Brisgau, &c.— Arseniate of lead.—Molybdate of 
lead., or yellow lead ore, massive, lamelliform, 
and crystallized; on compact lime-stone, &c. 
chiefly from Bleyberg in Carinthia.—The spe¬ 
cimens of chromate of lead, or red lead ore, de¬ 
posited in this case, are particularly beautiful 
and instructive : the accompanying substances 
are green lead ore, and sometimes small greenish- 
brown crystals of a substance (VauqueVmite) 
which appears to be chromate of copper and 
lead : the gangue stone, in which the red lead 
occurs in the gold mines of Beresof, is a kind of 
micaceous rock mixed with particles of quartz 
and brown iron-stone.— Murio-carbonate of 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 
^nd massive.— head earth, indurated and friable, 
of various colours ; its different varieties appear 
to be related to carbonates, phosphates, and sul¬ 
phates 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. 
