60 
NATURAL HISTORY. (Minerals.) 
[north 
called black-lead), massive (the purest and most compact variety of 
which is that from Cumberland), disseminated in porcelain earth, &c. 
Selenium is found in chemical combination with several metals; 
the seleniurets here deposited are : lead-selemuret ( Clausthalite,Ueud. ) ; 
copper-lead-seleniuret ; — mercury seleniuret (onofnte, Haid.) from 
San Onofre, Mexico mercury-lead-selemuret ;— cobalt-lead-selem- 
uret ( thilkerodite , Beud.), most of them from the Hartz ;— copper- 
seleniuret ( berzeline , Beud.), and copper-si ver-selemuret ( euhainte ), 
ooth from Strickerum, Sweden ;— to which are added specimens of 
sulphur, from the Lippari island of Volcano incrusted and coloured 
bv reddish-brown or orange red particles, which are a combination of 
selenium with sulphur, to which the name of volcamte 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 Sicdy, arm 
from Conilla in Spain, the stalactic, and other varieties, accompanied 
bv selenite, sulphate of strontia, &c. ; and the massive and pulverulent 
sulphur found sublimed near the craters of volcanos, &c.) is succeeded 
bv the Sulphurets, which occupy half ot 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 m Tran^y Lama 
and from Peru ; to which has been added the hauente of Haidmger, 
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 particulanzed those l el^ii e 
to colour, viz., the yellow, the brown, and the black-blende ot VY ernei . 
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, o> 
marcasite, crystallized in cubes smooth and striated, variously modified, 
as octahedral and pentagono-dodecahedrai forms, or these iorms 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 which belong most ot the varieties 
of what is commonly called lenticular or coxcomb-pyrites, spear-pyrites, 
as also the globula'r pyrites of a radiated texture, and the hepatic or 
liver-pyrites of Werner (distinct from the fer sulfure hepatique ot 
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 Bodenmais, Bavaria, &e. ; 
massive and crystallized in six-sided prisms. — Sulphuret of cobalt, from 
Bastnaes in Sweden — Sulphuret of nickel or mcMlende, or millente, 
formerly called capillary iron-pyrites (haarkies W.), and afterwa os 
considered as native nickel, till its real composition was determined 
by Arfvedson, from Joachimsthal and Merthyr lydvil the gersdorffite, 
a sulph-arseniuret nickel — Sulphuret of cadmium, lately discovered 
at Bishoptown in Renfrewshire, and to which the name of greenoch- 
ife has been given : one of the crystals here deposited (presented 
by Earl Cathcart) well exhibits the peculiar adamantine lustre ot this 
substance. 
