36 
saloon*. 
Nat. Hist. 
are:—the sulphur eis, consisting of dark-red cin¬ 
nabar (by far the more common variety), massive, 
crystallized, and in combination with various 
mineral substances; the bright-red cinnabar (na¬ 
tive vermilion, 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 mercury, 
with native quicksilver, &c. 
Cass SO . 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 are 
placed the alloy called electrum , from Smeof in 
Siberia, and the auriferous silver from Kongs- 
berg in Norway, both being a mixture of gold 
and silver in different proportions. Other alloys 
of silver are the scarce antimonial silver from 
Wolfach and Andreasberg, and the arsenical sil¬ 
ver from Guadalcanal in Andalusia.—Among the 
numerous varieties of native silver , may be par¬ 
ticularized the various imitative forms in yvhich 
it occurs,such as tooth-shaped, wire-shaped, den¬ 
ari ti cal, moss-like, reticular, &c., many of which 
are aggregations of minute crystals.—Common 
sulphuret of silver , or vitreous silver; massive, 
crystallized, and in other external forms, among 
which are the laminar and capillary.—Brittle 
vitreous silver, of which some specimens are also 
deposited 
