115 
variously crystallized, foliated, compact, &c.; to this 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.— Tennantite.—Sulphuret of copper and iron, to 
which belongs the yellow copper or copper pyrites, includ¬ 
ing the pale-yellow fine-grained variety, called hematiti- 
form or blistered copper pyrites; and the variegated cop - 
per 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 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 
corroded appearance, decomposed and regenerated; 
the compact and specular variety, called slickenside by 
the Derbyshire miners. 
Case 9. Sulphurets continued: sulphuret of bismuth, 
or bismuth glance, in acicular crystals from Riddar- 
hyttan, &c.— Sulphuret of copper and bismuth, called 
copper-bismuth. —The needle-ore of Werner, a triple 
sulphuret of bismuth, lead, and copper.— Sulphuret 
of copper and tin , or tin-pyrites. —The remainder of 
this case is taken up by a considerable suite of speci¬ 
mens of sulphuret of mercury or cinnabar, divided by 
Werner into the dark-red (by far the most common vari¬ 
ety), and the bright-red cinnabar (native vermilion, much 
esteemed by painters); the hepatic mercurial ore or 
liver ore, a mixture of cinnabar with bituminous and 
earthy particles, from Idria, compact and slaty: the same 
with petrifactions (coral ore). 
Case 10. Sulphuret of silver, vitreous silver, or silver 
glance, massive, crystallized, and in other external forms, 
among which are the laminar and capillary: the black 
silver-ore appears to be a pulverulent variety of this 
i 2 species; 
LONG 
GALLERY. 
Nat. Hist. 
