GALLERY.] 
natural history. (Minerals.) 
61 
and its chemical combinations (arseniurets )—with nickel (a variety of 
which is commonly called red or copper-nickel on account of its 
colour) ;—with cohalt , (arsenical cobalt of authors partly,) comprising 
the grey and part of the white cobalt of some mineralogists (to which 
probably belongs the bismuth-cohalt or kerstenite of some minera¬ 
logists). 
In the opposite half of this Case are contained the substances be- 
t longing to the orders of Carbon and of Selenium . To the former 
element are referred the diamond, anthracite, and graphite; to the 
latter the selenium metals or seleniurets. Among the specimens se¬ 
lected to illustrate the crystalline forms of the diamond are:—the 
primitive regular octahedron; the same with solid angles truncated; 
with edges truncated, forming the passage into the rhomb-dodecahedron; 
I varieties of the latter, giving rise to the six-sided prismatic and the 
| tetrahedral forms ; cubes with truncated and bevelled edges; various 
i hemitropic crystals or macles of diamonds; an octahedral diamond, 
i attached to alluvial gold; two others in a siliceous breccia with ce¬ 
ment of hydrous oxide of iron, and one in compact brown iron stone, 
! from Brazil; models of large diamonds, &c. (with these are placed 
i 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 
cascalhao ;)—varieties of anthracite or kohlenblende (to which may be 
referred the Kilkenny coal), from various localities, with native silver 
from Kongsberg, Sec. ;—graphite (commonly called black-lead), massive 
(the purest and most compact variety of which is that from Cumber¬ 
land), disseminated in porcelain earth, &c. 
Selenium : found in chemical combination w T ith 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 ( herzeline , Beud.), and copper-siiver-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-brow 7 n or orange red particles, w T hich are a com¬ 
bination of selenium w 7 ith sulphur, to which the name of volcanite has 
been given; (also a medallion, in selenium, of its discoverer, Ber¬ 
zelius). 
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 w 7 ith 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 
