37 
deposited in the following table-case.— White 
silver ore. 
Case 31. The ores of silver contained in this 
case are the dark and light-coloured varieties of 
red or ruby silver ore , massive, crystallized, and 
in combination with various substances ; the black 
silver ore , or sooty silver, which has not been ana¬ 
lysed 5—the muriate of silver , called also corneous 
silver and horn ore, of various colours, amorphous, 
botryoidal, in laminae, and crystallized in minute 
cubes and octahedrons the very scarce carbo¬ 
nate of silver, also called grey silver ore, from 
Alt-Wolfach in Suabia, &c.—In this case begin 
the numerous copper ores: among the specimens 
of native copper (which, like the native silver, 
presents a great variety of forms besides the crys¬ 
tallized, such as dendritic, filiform, &c.) may be 
specified the mass from Hudson’s Bay, found by 
Mr. Hearne, and described by him in his journal. 
Case 32. Ores of copper continued: common 
sulphuret of copper or vitreous copper, variously 
crystallized, foliated, compact, &c. To this are 
also commonly referred the oblong, scaly, second¬ 
ary fossils, known by the name of Frankenberg 
corn ears , which occur in the bituminous marl- 
slate of Frankenberg in Hessia, and are princi¬ 
pally composed of vitreous and grey copper.— 
The variegated copper ore , easily known by the 
reddish colour of its fractural planes, massive 
and foliated.—The grey copper ore (fahl ore), 
crystallized. 
SALOON. 
Nat. Hist. 
