gallery.] natural history. (Minerals.) 59 
the seleniurets here deposited are: lead-seleniuret ( Clausthalite,Be\id .); 
._copper-lead-seleniuret;—mercury seleniuret ( onofrite, Haid.) from 
San Onofre, Mexico ;—mercury-lead-seleniuret;—cobalt-lead-seleni- 
uret ( tliilkerodite , Beud.), most of them from the Hartz ;—copper- 
seleniuret ( berzeline, Beud.), and copper-silver-seleniuret ( eukairite ), 
both from Strickerum, Sweden ;—to which are added specimens of 
sulphur, from the Lippari island of Volcano, incrusted and coloured 
by reddish-brown or orange red particles, which are a combination of 
selenium with sulphur, to which the name of volcanite has been given ; 
—also a medallion, in selenium, of its discoverer, Berzelius. 
Case 5. The suite of specimens of sulphur (among which may be 
specified the splendid crystallizations from La Catolica in Sicily, and 
from Conilla in Spain, the stalactic, and other varieties, accompanied 
by selenite, sulphate of strontia, &c. ; and the massive and pulverulent 
sulphur found sublimed near the craters of volcanos, &c.) is succeeded 
by the Sulphurets, which occupy half of this and seven of the next fol¬ 
lowing Table Cases. They begin with sulphuret of manganese or man¬ 
ganese-blende, (alabandine of Del Rio,) from Nagyag in Transylvania 
and from Peru; to which has been added the hauerite of Haidinger, 
lately found in beautiful crystals, belonging to the tessular system, at 
Kalinka, near Neusohl, in Hungary.—Among the numerous varieties 
of sulphuret of zinc , or zinc-blende , may be particularized those relative 
to colour, viz., the yellow, the brow 7 n, and the black-blende of Werner: 
the first of which is generally most pure, while the others contain a 
portion of iron; the radiated, fibrous and testaceous blende, the most 
characteristic specimens of which are from Przbram in Bohemia, and 
from Geroldseck in the Brisgau. 
Case 6_ Sulphurets of iron, or iron pyrites :—common pyrites, or 
marcasite , crystallized in cubes smooth and striated, variously modified, 
as octahedral and pentagono-dodecahedral forms, or these forms com¬ 
bined: from several localities, of which Traversella, in Piedmont, and the 
isle of Elba yield the finest specimens ;—radiated pyrites, a substance 
very subject to decomposition, and to w T hich belong most of the varieties 
of what is commonly called lenticular or coxcomb-pyrites, spear-pyrites, 
as also the globular pyrites of a radiated texture, and the hepatic or 
liver-pyrites of Werner (distinct from the fer sulfure hepatique of 
some French mineralogists, which is both radiated and common iron 
pyrites converted into brown ironstone );—magnetic pyrites, which is 
nearly allied to the preceding species, from Bodenmais, Bavaria, &c. ; 
massive and crystallized in six-sided prisms. — Sulphuret of cobalt, from 
Bastnaes in Sweden .—Sulphuret of nickel or nickel-blende, or millerite, 
formerly called capillary iron-pyrites (haarkies W.), and afterwards 
considered as native nickel, till its real composition was determined 
by Arfvedson, from Joachimsthal and Merthyr Tydvil;—the gersdorffite, 
a sulph-arseniuret nickel —Sulphuret of cadmium, lately discovered 
at Bishoptown in Renfrewshire, and to which the name of greenock - 
ite has been given : one of the crystals here deposited (presented 
by Earl Cathcart) well exhibits the peculiar adamantine lustre of this 
substance. 
Case 7. Sulphuret of copper, copper glance, or vitreous copper , 
variously crystallized, foliated, compact, &c., chiefly from Cornwall; 
to which are also commonly referred the vegetable fossil remains 
