105 
position, 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 radiated; and also common iron pyrites, con¬ 
verted into brown iron stone);— magnetic pyrites, which 
is nearly allied to the preceding species: massive and 
crystallized in six-sided prisms.— Sulpliuret of cobalt , 
from Bastnaes in Sweden.— Sulpliuret of nickel, for¬ 
merly called capillary iron pyrites, and afterwards con¬ 
sidered as native nickel, till its real composition was 
determined by Arfvedson. 
Case 7. Sulphuret of copper , or vitreous copper , 
variously crystallized, foliated, compact, &c.; to this are 
also commonly referred the secondary fossils, known by 
the name of Frankenberg corn ears , which occur in the 
bituminous marl-slate of Frankenberg in Hessia, and are 
principally composed of vitreous and grey copper.— 
Tennantite .— Sulpliuret of copper and iron , to which 
belong the yellow copper or copper pyrites, including 
the pale-yellow fine-grained variety, called hematitiform 
or blistered copper pyrites ; and the variegated copper 
ore (buntkupfer-erz), differing from the former in the 
proportions of its constituent parts, and easily known 
by the reddish colour of its fractural surfaces; crys¬ 
tallized, massive, and foliated. 
Case 8 contains a suite of specimens of sulpliuret of 
leadj or galena, which include various 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. 
Case 9. Sulphurets continued: sulphur et ofbismuth , 
or bismuth glance, in acicular crystals from Riddar- 
hyttan, &c.— Sulpliuret of copper and bismuth , called 
copper-bismuth ore.—The needle-ore of Werner, a 
triple 
LONG 
GALLERY. 
Nat. Hist. 
