172 NATURAL HISTORY. [NORTH 
Case 40. Columbates ;—columbite or tantalite: a portion of the 
specimen of this substance from North America, in which Mr. Hatchett 
discovered the metal; variety of the same from Rabenstein, Bavaria, 
accompanied by beryl and uranite ;—the Finbo- and the Brodbo-tanta - 
lites of Berzelius;— yttrotantalite, from Ytterby. 
Oxides of antimony and antimoniates :— antimony-ochre on native 
and grey antimony ;—white antimony, formerly considered as a muriate: 
on galena, quartz, &c. ;—red antimony (a combination of oxide and 
sulphuret of this metal), mostly in fine capillary crystals, from Brauns- 
dorf in Saxony, Malazka in Hungary ; and an argentiferous variety from 
the Hartz, in fibrous flakes resembling tinder, and therefore called zun - 
derertz (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 is the primitive acute octahedron from Allemont in 
Dauphiny ;—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, from Zinnwald in Bohemia, formerly confounded with 
the molybdate of this metal. 
Molybdic acid and molybdates ;—ochry molybdenum or molybdic 
acid , as a yellow powder on the sulphuret of this metal, from Sweden, 
&c. ;—molybdate of lead, or yellow lead ore, massive, lamelliform, and 
crystallized 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, red lead ore, 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¬ 
berian red lead ore ;—chromate of iron, from the department of Var in 
France, and from Baltimore in Maryland, intermixed with talc stained 
purple by chromic acid. 
Vanadic acid and vanadiates. 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 vanadiate of lead (johnstonite) at Wanlockhead, and 
the analysis of this mineral s ubstance, science is indebted to Mr. John¬ 
ston, of Edinburgh;—vanadiate of lead from Beresof, Siberia. 
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 botryolite') likewise from 
Arendal. 
In this Case begins the family of the Carbonates— Carbonate of soda, 
from various localities .—Carbonate of strontia , called strontianite , chiefly 
from Strontian in Argyleshire, in prismatic and acicular crystals, which 
latter have sometimes been mistaken for arragonite .—Carbonate of 
