132 
LONG 
GALLERY. 
Nat. Hist. 
Tungstates: —tungstate of lime (scheelin calcaire of 
Haiiy), also called scheelite and tungsten (heavy stone), 
among the more interesting specimens of which is the 
primitive acute octahedron from Allemont in Daupliiny ; 
—tungstate of iron and manganese or wolfram, massive 
and crystallized, from Bohemia and other countries; 
also as octahedral supposititious crystals, derived from 
tungstate of lime ;— tungstate of lead, or scheel-lead 
ore y from Zinnwald in Bohemia, formerly confounded 
with the molybdate of this metal. 
Molybdic acid and molybdates:— ochry molybde¬ 
num or molybdic acid, as a yellow powder on the sul- 
phuret of this metal, from Sweden, &c.— molybdate of 
lead, or yellow lead ore, massive, lamelliform, and crys¬ 
tallized in splendid groups on compact limestone, &c., 
chiefly from Bleiberg in Carinthia. 
Case 41. Oxide of chromium and chromates:—a 
suite of specimens of chromate of lead, or red lead 
ore, from the gold mines of Beresof in Siberia, where 
it chiefly occurs in a kind of micaceous rock, mixed 
with particles of quartz and brown iron-stone ;— chro¬ 
mate of lead, and copper , called vauquelinite , a conco¬ 
mitant of the Siberian red lead ore ;■— chromate of iron , 
from the department of Var in France, and from Balti¬ 
more in Maryland, intermixed with talc stained purple 
by chromic acid. 
Vanadic acid and vanadiates. Vanadium was dis¬ 
covered in some ores of iron from Taberg in Smaland, 
by Sefstrom: by Del Rio the acid of this metal, which 
he called erythronium, had been found, combined with 
oxide of lead, in the brown lead ore of Zimapan in 
Mexico. For the discovery of the vanadiate of lead , 
of which several varieties occur at Wanlockhead, and 
the analysis of this mineral substance, science is in¬ 
debted to Mr. Johnston, of Edinburgh. 
Boracic acid (sassoline) and borates; —borate of soda, 
the salt known by the names of borax and tincal , from 
Tibet, Monte-rotondo, Tuscany, &c.; —borate of mag¬ 
nesia ox boracite in separate crystals, and.the same em¬ 
bedded 
