37 
silver, between which and the ores of gold is 
placed the alloy, called electrom, 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 in the Black Forest, and the arsenical sil¬ 
ver from Guadalcanal in Andalusia.—Among the 
numerous varieties of native silver may be parti¬ 
cularised the various imitative forms in which it 
occurs, such as tooth-shaped, wire-shaped, den- 
dritical, moss like, reticular, &c., many of 
which are aggregations of minute crystals.-—Vi¬ 
treous silver, or common sulphurct of 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 in the following glass case. 
(Case 31.) The ores of silver contained in 
this case are the dark and light coloured varieties 
of red silver, massive, crystallized and in com¬ 
bination with various substances ;—the black sil¬ 
ver ore, or sooty silver, which has not been ana¬ 
lysed ;—the muriate of silver, called also corne¬ 
ous silver and horn ore, of various colours, amor¬ 
phous, botryoidal, in laminae, and crystallized 
in minute cubes and octahedrons;—the very 
scarce carbonate of silver from Alt-Wolfach in 
Suabia, 
SALOON. 
Nat. Hist. 
