72 natural HISTORY. (Minerals.) [north 
Case 38. In this Table Case (besides the silicates containing 
yttria and protoxide of cerium, mentioned in the description of Case 
37) are placed the following orders of minerals. 
Combinations of columbic or tantalic acid with protoxides of iron, 
manganese, lime, yttria, zirconia, &c.: among the columbates or tan- 
talates here deposited may be specified the specimens of tantalite (co- 
lumbite) sent by Gov. Winthrop to Sir Hans Sloane, in which Mr. 
Hatchett, in 1801, discovered the metal denominated by him Co - 
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, the uranotantalite of G. Rose, from Miask, 
Siberia;—the microlite of Shepard, from Chesterfield, Massachusetts, 
(apparently a titanate of lime,) the wohlerite of Scheerer, &c. 
Oxides of antimony:— antimony-ochre on native and grey antimony; 
—several varieties of the scarce white antimony, from Przibram in Bo¬ 
hemia, 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 variety from the Hartz, in fibrous flakes resembling 
tinder, and therefore called zunderertz (tinder ore). 
Tungstates :— tungstate of lime (scheelin calcaire of Haiiy), also called 
scheelite and tungsten (heavy stone), among the more interesting speci¬ 
mens of which are the primitive acute octahedron from Allemont in 
Dauphiny, and the group of very large crystals from Schlackenwald in 
Bohemia;— tungstate of iron and manganese or wolfram, massive and 
crystallized, from Schlackenwald and other localities ; 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. 
Yanadic acid and vanadates. Vanadium was discovered 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 vanadate of lead (jolinstonite) at Wanlockhead, and 
the analysis of this mineral substance, science is indebted to Mr. John¬ 
ston, of Edinburgh. Vanadate of lead from Beresof, Siberia;—the 
volborthite of Hess, a vanadate 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, Sec. ;— 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. 
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 vauquelinite, a concomitant of the Si- 
