A SYSTEM OF 
34 
3. In this lail circumftance it lofes thirty 
or forty per cent, of its weight, which 
by diftillation has been found owing to the 
water that evaporates^ and it is poffible 
that iome fmall quantity of vitriolic acid 
may, at the fame time, evaporate with 
the water. 
4. It is of ail the iron ores the moft eafy to 
melt, and is very corroiive when melted. 
This kind is found, 
SECT. XXXL 
A. Loofe, Minera ferri alba pulverulenta^ 
. and is the mouldered part of the indurated 
fort. 
a. Black. 
Is like foot. It is found at Wefter-fl- 
verberget in Kopparberg Sian in Swe*den 
among the earth that covers the white 
iron ore. 
h Dark brown. 
This fomewhat refembles umbre, and 
is found to this day at Solflcienfbcrget in 
Norberg in the province of Weftmanland, 
SECT. XXXIL 
B. Indurated, Indurata, 
I, Solid, of no diftind: particles, Solida par^ 
tkulis'impalpabilibus, 
a. Red, Miner a ferri ealcarea rubra. 
Looks like red ochre, or the red hae- 
matites, but diffolves in the acid of ni- 
tre with a great effervefcence. It is 
found at Hellefors in the province of 
Weft^ 
