184 
NATURAL HISTORY. 
[north 
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 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 specimens of which is the pri¬ 
mitive acute octahedron from Allemont in Bauphiny; 
—tungstate of iron and, manganese or wolfram , massive 
and crystallized, from Bohemia and other countries ; also 
as octahedral supposititious crystals, derived from tung¬ 
state 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 
molybdie 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 , or red lead ore,,from the 
gold mines of Beresof in Siberia, wdiere it chiefly occurs in 
a kind of micaceous rock, mixed with particles of quartz 
and brown iron-stone, and from Brazil ;— chromate of lead 
and copper , called vauquelinite , a concomitant of the Sibe¬ 
rian red lead or q chromate of iron , from the department 
of Var in France, and from Baltimore in Maryland, in¬ 
termixed with talc stained purple by chromic acid. 
Vanadic acid and vanadiates. Vanadium was disco¬ 
vered 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 sub¬ 
stance, science is indebted to Mr. Johnston, of Edinburgh ; 
—vanadiate of lead from Beresof, Siberia. 
