38 
SALOON. 
Nat. Hist. 
are the laminar and capillary.—Brittle vitreous 
silver, of which some specimens are also 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 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, secon¬ 
dary 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 
