SILVER. 117% 
various silver mines. It is also found mixed with native 
copper. 
‘The mines of Norway, at Kongsberg, formerly afforded mag- 
nificent specimens of native silver, but they are now mostly 
under water. One specimen from this locality, at Copenha- 
gen, weighs five hundred pounds; and two other masses 
have been found weighing 238 and 436 pounds. Other HKu- 
ropean localities are in Saxony, Bohemia, the Hartz, Hun- 
gary, Dauphiny. Peru and Mexico also afford native silver. 
A Mexican specimen from Batopilas, weighed when obtained 
405 pounds ; and one from Southern Peru (mines of Huan- 
tajaya) weighed over 8 cwt. Arizona is reported to have 
produced one mass weighing 2,700 pounds. In the United 
States, in the Lake Superior region, the silver generally pen- 
etrates the copper in masses and strings, and is very nearly 
pure, notwithstanding the copper about it. Large masses 
occur at the Idaho Silver Mine, called the Poor Man’s Lode ; 
and in strings it is occasionally found in the mines of Ne- 
yada, California, and Colorado. | 
Much of the galena of the world contains avery small per- 
centage of silver; that of Monroe, Conn., yields nearly 3 
per cent. 
Native silver has also been observed near the Sing Sing 
state prison ; at the Bridgewater copper mines, N. J.; and 
in handsome specimens at King’s Mine, Davidson County, 
North Carolina. 
Native Amalgam is a compound of silver and mercury. The com- 
pounds Ag Hg = Silver 35°1, mercury 64:9, or Ag, H, = Silver 26°5, 
mercury 73'5, are included. Another from Chili having the formula 
Ag,, Hg and containing 85°6 per cent. of silver has been called Ar- 
querite ; and still another Ag,, Hg, Kongsbergite. 
Argentite._Silver Glance. Suiphuret of Silver. 
Isometric. In dodecahedrons more or less modified. 
Cleavage sometimes apparent parallel to the faces of the 
dodecahedron. Also reticulated and massive. 
Lustre metallic. Color and streak blackish lead-gray ; 
streak shining. Very sectile H.=2-2%. G.=7:19- 
74. 
Composition. When pure, Ag,S = Sulphur 12:9, silver 
87:1. B.B. on charcoal in O.F. it intumesces, gives off the 
odor of sulphur, and finally affords a globule of silver. 
Diff. Resembles some ores of copper and lead, and other 
