NATURAL HISTORY. 
161 
GALLERY.] 
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 glass cases. They begin with sulphuret of manganese or man¬ 
ganese-blende, from Nagyag in Transylvania and from Peru.—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 fibrous blende of 
Przbram in Bohemia, in which cadmium was first discovered ; the va¬ 
riety called testaceous or schaalen-blende (the most characteristic 
specimens of which are from Geroldseck in the Brisgau), containing, 
besides iron, a portion of lead. 
Case 6_ Sulphurets of iron, or iron pyrites :—common pyrites, 
crystallized and variously modified, in cubes smooth and striated, from 
several localities;— radiated pyrites, a substance very subject to de¬ 
composition, and to which belong most of the varieties of what is 
commonly called lenticular or coxcomb-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: massive and crystallized in six-sided prisms. — Sulphuret of 
cohalt, from Bastnaes in Sweden.— Sulphuret of nickel, formerly 
called capillary iron-pyrites, and afterwards considered as native nickel, 
till its real composition w T as determined by Arfvedson_ Sulphuret of 
cadmium, lately discovered at Bishopstown in Renfrewshire, and to 
which the name of greenockite has been given. 
Case 7. Sulphuret of copper, copper glance, or vitreous copper, 
variously crystallized, foliated, compact, &c. ; to which are also com¬ 
monly referred the vegetable fossil remains known by the name of 
Frankenberg corn-ears, from the bituminous marl-slate of Frankenberg 
in Hessia, which are principally composed of vitreous and grey copper. 
—Sulphuret of copper and iron, to which belongs the copper pyrites 
or yellow copper, including the pale-yellow fine-grained variety called 
hematitiform, or blistered copper-pyrites; and the variegated copper ore 
(buntkupfererz), differing from the former in the proportions of its con¬ 
stituent parts, and easily known by the reddish colour of its fractural 
surfaces: crystallized, massive and foliated.— -Tennantite, by some re¬ 
ferred to fahl ore, from Cornwall. 
Case 8 contains a suite of specimens of sulphuret of lead or galena, 
which include a great variety of modifications of crystals, detached and 
grouped together, in combination with blende, pyrites, and many other 
substances ; galena of various grain, massive and disseminated; galena 
of corroded appearance, decomposed and regenerated; the compact 
and specular variety, called slickenside by the Derbyshire miners, &c. 
Case 9. Sulphuret of bismuth, or bismuth-glance, in acicular crystals, 
from Riddarhyttan, &c.— Sulphuret of copper and bismuth, called 
copper-bismuth, from Wittichen, in the Black Forest_The needle-ore 
