34 A SYSTEM O f 



3. In this iaft circumflance it lofcs thirty 

 or forty per cent, of its weight, which 

 by diilillation has been found owing- to the 

 water that evaporates ; and it is pofllble 

 that fome fmall quantity of vitriolic acid 

 may, at the fame time, evaporate with 

 the water. 



4. It is of all the iron ores the moft. eafy to 

 melt, and is very corrofive when melted. 



This kind is found, 



SECT. XXXI. 



■ . 



A. LooFe, Miner a ferri alba pulverulent a 9 



and is the "mouldered part of the indurated 



fort. 



75'in 



a. Black. 



Is like foot. It is- found at Wefter-fil- 

 verberget in Kopparberg Slan in Sweden 

 among the earth that covers the white 

 iron ore. 

 ft. Dark brown. 



This fomewhat refembles timbre, and 

 is found to this day at Sollkieniberget in 

 Norberg in the province of Weftmanland. 



SECT. XXXII. 



B. Indurated, In&urata. 



1, Solid, of no diftincr. particles, Sotida par* 

 ticulis impalpabilibus. 

 a. Red, Miner a ferri calcarea rubra.^ 



Looks like red ochre, or the red hae- 

 matites, but dilTolves in the acid of ni- 

 tre with a great eftervefcence. It is 

 found at Hellefors in the province of 



Weft- 



