46 natural bistory. (Minerals.) [north 
San Onofre, Mexico;—mercurv-lead-seleniuret;—cobalt-lead-seleni- 
uret ( thilkerodite, Bead. ), most of them from the Hartz ;—copper- 
seieniuret ( berzeline , Beud. ), and copper-silver-seleniuret ( eukairite, 
Berz.), both from Strickerum, Sweden;—to which are added speci¬ 
mens of sulphur, from the Lippari island of Volcano, incrusted and 
coloured by reddish-brown or orange red particles, which are a com¬ 
bination 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 w 7 hich 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 brown, 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 :—one of the most widely 
diffused metallic ores, and belonging to all geological formations; it is 
divided into common pyrites , or marcasite, crystallized in cubes smooth 
and striated, variously modified, as octahedral and pentagono-dodecahe, 
dral forms, or these forms combined: from several localities, among 
which Traversella, in Piedmont, the isle of Elba, St. Gothard, Aren- 
dahl, Cornwall, yield the finest specimens ;—radiated pyrites, a sub¬ 
stance 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 iron stone );—magnetic 
pyrites, which is nearly allied to the preceding species, from Boden- 
mais, Bavaria, &c. ; massive and crystallized in six-sided prisms;—the 
kausimkies or lonchidite of Breithaunt, also called sparkies. — Sulphuret 
of cobalt, linneite. from Bastnaes in Sweden .—Sulphuret of nickel or 
nickel-blende ( millerite , Haid.), formerly called capillary iron-pyrites 
(haarkies W.), and afterwards considered as native nickel, till its real 
composition was determined by Arfvedson, from Joachimsthal and Mer¬ 
thyr Tydvil;—the gersdorffite, a sulph-arseniuret of nickel Sulphuret 
of cadmium, from Bishoptown in Renfrewshire to which the name of 
greenockite has been given, after Lord Greenock, its discoverer : one 
of the crystals here deposited well exhibits the peculiar adamantine 
lustre of this substance. 
Case 7. Sulphuret of copper, copper glance , or vitreous copper, 
compact, foliated, and variously crystallized, &c., chiefly from Redruth, 
Cornwall, and from Bristol in Connecticut, in which two localities the 
