36 
SALOON. 
Nat. Hist. 
with needle ore (acicular sulphuret of bismuth, 
&c.) from Siberia; the brass yellow gold (prin¬ 
cipally from Transylvania) crystallized in minute 
cubes and octohedrons variously aggregated, in 
reticular plates, &c.—The ores of mercury in this 
case arethe sulphurets, consisting of dark red 
cinnabar (by far the more common variety) mas¬ 
sive, crystallized, and in combination with vari¬ 
ous mineral substances; the bright red cinnabar 
(native Vermillion, much esteemed by painters); 
the hepatic mercurial ore from Idria, compact 
and slaty; the former also with petrifactions 
(coral ore) ; muriate of mercury , or corneous mer¬ 
cury, with native quicksilver, &c. 
(Case 30.) This case contains (besides some 
additional specimens of gold and mercurial ores 
among the latter of which is the scarce native 
amalgam, crystallized and globular) the ores of 
silver , between which and the ores of gold is 
placed the alloy, called electrum , from Smeof in 
Siberia, and the auriferous silver from Kongsberg 
in Norway, both being a mixture of gold and 
silver in different proportions. Other alloys of 
silver are the scarce antimonial silver from Wolfach 
in the Black Forest, and the arsenical silver from 
Guadalcanal in Andalusia.—Among the numerous 
varieties of native silver may be particularised the 
various imitative forms in which it occurs, such as 
tooth-shaped, wire-shaped, dendritical, moss-like, 
reticular, &c., many of which are aggregations 
of 
