NATURAL HISTORY. 
60 
[north 
lumbium , but which, eight or nine years later, was ascertained by Dr. 
Wollaston to be identical with the metal found nearly about the same 
time in the tantalite and yttrotantalite by Eckeberg, who had called it 
tantalum: a name that had become familiar to continental chemists and 
mineralogists, and was therefore retained by them;—the same from 
Rabenstein in Bavaria, accompanied by crystallized beryl and ura- 
nite ;—the Finbo- and the Brodbo-tantalites of Berzelius;—the yttro¬ 
tantalite , from Ytterby, &c. 
Oxides of antimony:— antimony-ochre on native and grey antimony; 
.—white antimony , formerly considered as a muriate: on galena, quartz, 
&c. ;_ red antimony , also called antimony-blende, (a combination of 
oxide and sulphuret of this metal,) mostly in fine capillary crystals, from 
Braunsdorf in Saxony, Malazka in Hungary ; and an argentiferous va¬ 
riety from the Hartz, in fibrous flakes resembling tinder, and therefore 
called zunderertz (tinder ore). 
Tungstates :—tungstate of lime (scheelincalcaire of Haiiy), also called 
scheelite and tungsten (heavy stone), among the more interesting speci¬ 
mens of which is the primitive acute octahedron from Allemont in 
Dauphiny ;—tungstate of iron and manganese or wolfram , massive and 
crvstallized, from Bohemia and other countries; also as octahedral 
supposititious crystals, derived from tungstate of lime ;—tungstate of lead. 
or scheel-lead , from Zinnwald in Bohemia, formerly confounded with 
the molybdate of this metal. 
Vanadic acid and vanadiates. Vanadium was discovered in some ores 
of iron from Taberg in Smaiand, by Sefstrdm : 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 (johnstonite) at Wanlockhead, and 
the analysis of this mineral substance, science is indebted to Mr. John¬ 
ston, of ^Edinburgh; vanadiate of lead from Beresof, Siberia;—the 
volborthite of Hess, a vanadiate of copper. 
Case 39. Molybdic acid and molybdates ;—molybdenum ochre or 
molybdic acid , as a yellow powder on the sulphuret of this metal, from 
Sweden, &c. ;—molybdate of lead , yellow lead ore, or carinthite , mas¬ 
sive, lamelliform, and crystallized in splendid groups on compact lime¬ 
stone, &c.; chiefly from Bleiberg in Carinthia. t 
Oxide of chromium and chromates:—a suite of specimens of chro¬ 
mate of lead, red lead ore, or crocoisite, 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, and from Brazil;— chro¬ 
mate of lead and copper, called muquelinite, a concomitant of the Si¬ 
berian red lead ore ;— chrome-iron, from the department of Var in 
France, and from Baltimore in Maryland, intermixed with talc stained 
purple by chromic acid. 
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 magnesia or boracite in separate crystals, and the same 
embedded in gypsum;— datolite, being a borate with a tri-silicate of 
lime, from Arendal in Norway; the variety from Sonthofen (supposed 
to be a distinct species, called humboldtite by Levy) ; and the globular- 
fibrous variety (which has received the name of botryelite') likewise from 
Arendal 
