43 
&c.; the black lead ore of Werner, which appears saloon. 
to be merely a variety of the white lead ore.— Nat. Hist. 
With these are placed three substances from 
Leadhills, hitherto considered as carbonates, but 
which, according to analyses lately published, 
are, sulphato-carbonate, sulphato-tricarbonate, 
and cupreous sulphate of lead.—Phosphates of 
lead, which are divided by Werner into brown 
lead ore, and green lead ore. Among the speci¬ 
mens of the brown phosphate , the most remark¬ 
able are the large six-sided prisms from Huel- 
goet in Britany, &c. 
Case 43. Ores of lead continued : — green 
phosphate , massive, botryoidal, spicular, &c. ; 
variously crystallized; of various shades of green, 
passing into greenish-white, into yellow and 
orange; with ferruginous quartz, straight-foliated 
heavy spar, &c. from Freiberg in the Brisgau, k c. 
—Arseniate of lead—Molybdate of lead, or yellow 
lead ore ; massive, lamelliform, and crystallized; 
on compact limestone, kc. chiefly from Bley- 
berg in Carinthia.— 1 The specimens of chromate 
of lead , or red lead ore, deposited in this case, 
are particularly beautiful and instructive : the 
accompanying substances are green lead ore, 
and sometimes small greenish-brown crystals of 
a substance ( Vauquelinite ) 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 
