MINERALOGY. 16 ^ 
pure copper can be fmelted. It is found in 
Sladkierr’s Grufva in the province of Dal, 
and at Bifpergs Kiack, in the province of 
Dalarne. 
Minera ferri phlogiftica. 
This is not very different in its appear- 
ance from the pit-coal or folTil pitch-, but 
it is fomewhat harder to the touch : there 
are two varieties of this fpecies : 
1. Fixt in the fire. Miner ferri phlogifiic a 
fixa, 
Expofed to a calcining heat, it burns 
with a very languid though quick flame^ 
it preferves its bulk, and lofes only a 
little of its weight. It yields above 30 
per cent, of iron. 
■a. Solid, refembles black fealing-v/ax. 
It is found in the liver-coloured mar- 
cafite, (Sed. cliii.) in Waflcberget, at 
Norrberke, in V/eftmanland, 
b. Cracked, and friable, from Finnber- 
get, at Grythyttan, in Weftmanlandi 
Volatile in the fire, Minera ferri phlogi- 
Jiica volatilis. 
This- is unalterable in an open fire, 
either of charcoal, or even upon a piece 
of charcoal before the flame of the blow- 
pipe : but under a muffel the greatefl 
part of it volatilifes, fo that only a fniall 
quantity of calx of iron remains. It is 
found, 
a. Solid, from Kronprints Shurfi, at 
Kohgfberg, in Norway. 
b. Cracked, from the parifli of Quift-- 
bro, in the province of Ncrike. 
This lafl kind leaves more afhes : 
thefe .'aflies, when farther expofed to* 
M the 
