132 
LONG 
GALLERY. 
Case 7 contains a suite of specimens of sul¬ 
phuret of lead ox: 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 compact and specular variety, called slicken- 
side by the Derbyshire miners. 
Case 8. Sulphurets continued: sulphuret of 
bismuth , or bismuth glance, in acicular crystals 
from Riddarhyttan, &c.— Sulphuret of copper 
and bismuth , called copper-bismuth ore.—The 
needle-ore of Werner, a triple sulphuret of bis¬ 
muth, lead, and copper.— Sulphuret of copper 
and tin , or tin pyrites.—The remainder of this 
case is taken up by a considerable suite of 
specimens of sulphuret of mercury , divided by 
Werner into dark-red cinnabar (by far the 
most common variety), and the bright-red cin¬ 
nabar (native vermillion, much esteemed by 
painters) ; the hepatic mercurial ore f rom Idria, 
compact and slaty: the same with petrifactions 
(coral ore). 
Case 9. Sulphuret of silver , vitreous silver, 
or silver glance, massive, crystallized, and in 
other external forms, among which are the la¬ 
minar and capillary: the black silver ore appears 
to be a pulverulent variety of this species;—flex¬ 
ible silver glance. Sulphuret of antimony , or 
grey 
