98 
NATURAL HISTORY, 
Qlong 
Bohemia, in which cadmium was discovered by Stromeyer; 
the variety called testaceous or schaalen blende (the most 
characteristic specimens of which are from Geroldseck in 
the Brisgau) contains, besides iron, a portion of lead. 
Case 6.— Sulphurets of iron, or iron-pyrites:—common 
pyrites, smooth and striated, variously crystallized, from se¬ 
veral localities ; 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, 
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 iron-stone) ;— magnetic pyrites, which is nearly 
allied to the preceding species: massive and crystallized 
in six-sided prisms.— Sulphuret of cobalt, from Bastnaes 
in Sweden.— Sulphuret of nickel, formerly called capillary 
iron pyrites, and afterwards considered as native nickel, 
till its real composition was determined by Arfvedson. 
Case 7* Sulphuret of copper, or vitreous copper, va¬ 
riously crystallized, foliated, compact, &c.; to which are also 
commonly referred the vegetable fossil remains 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. — Ten - 
nantite. — Sulphuret of copper and iron, to which belongs 
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; crystallized, massive, and foliated. 
Case 8 contains a suite of specimens of sulphuret of lead 
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 cor¬ 
roded appearance, decomposed and regenerated: the com¬ 
pact and specular variety,, called slickenside by the Derby¬ 
shire miners. 
Case 9. Sulphurets continued: sulphuret of bismuth , 
or bismuth glance, in acicular crystals, from Riddarhyttan, 
