194 
A SYSTEM OF 
the Swedifti and Norwegian copper 
mines. 
4. Criftallifed marcafitical copper ore, 
a. Of long o6loedrical criftals. 
This is found at Hevaflwik, in 
the' province of Dal, and in Lo- 
vifagrufva, in Weftmanland ; not- 
withftanding its cxiftence is denied 
by Henckel, and his followers. 
d. Pale yellow, Pyrites cupri palUde flavus. 
This cannot be deferibed but as a 
marcafite, though an experienced eye 
will eafily difeover fome difference be- 
tween them. It is found at Tunaberg, 
in the province of Sodermanland, and 
yields 22 per cent, of copper, 
r. Liver-coloured. 
This is found at Falun, in Dalarne, 
where it contains copper ^ though at 
moft other places, where it occurs, it 
does not contain any copper, but is only 
a martial marcafite. 
SECT. CXCIX. 
3. With fulphurated arfenic and iron. Cuprum 
ferro ex arfemco fulphurato mineralijatum. 
White copper ore. 
It is faid to be found in the Hartz, in 
Germany, and to refemble an arfenical py- 
rites •, but I have never met with this kind. 
However, moft of the pyritical copper 
ores, as well as the marcafites, contain a 
little arfenic, though it is in too fmall a 
quantity to be obfervable. 
SECT; 
