GALLERY.] 
61 
NATURAL HISTORY. (Minerals.) 
one in compact brown iron stone, from Brazil ; models of large dia- 
monds, &c. With these are placed specimens of the alluvial rock in 
which this precious substance occurs in the East Indies and also in Brazil, 
where it is known by the name of cascalliao /—varieties of anthracite or 
kohlenblende (to which may be referred the Kilkenny coal), from various 
localities, with native silver from Kongsberg, &c . graphite (commonR 
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-seleniuret ( Clausthalite , Beud. ) • 
— copper-lead-seleniuret ; — mercury seleniuret ( onofrite , Haid.) from 
San Onofre, Mexico ; — mercury-lead-seleniuret cobalt-lead-seleni- 
uret ( thilkerodite , Beud. ), most of them from the Hartz ; copper- 
seleniuret ( berzeline , Beud. ), and copper-silver-seleniuret ( euhairite ), 
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 sulphur et 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 
o i 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, of which 
Traversella, in Piedmont, the isle of Elba, St. Gothard, Arendahl, 
&c., yield the finest specimens ; — radiated pyrites, a substance very 
subject to decomposition, and to which 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 sulfur e 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 milleritc , 
