MINERALOGY. 203 



Gagnoef in Dalarne : It is found 

 at that place almoft to the day, and 

 is of as great ftrength as any natu- 

 ral loadftones were ever common- 

 ly found. 

 i. Fine-grained, from Saxony. 



c. Coarfe-grained, from Spetalsgruf- 

 van, at Norberg, and Kierrgruf- 

 van, both in the province of Wefl- 

 manland. This lofes very foon its 

 magnetical virtue. 



d. With coarfe fcales, found at 

 Sandfwcer in Norway. This is a 

 pyritical Eifenman^ and yields a red 

 powder when rubbed. Seel;, cciii. 



SECT. CCXII. 



2. Refractory iron ore, Miner a ferri re- 

 trattoria. This in its crude flate is 

 attracted by the loadftone. 

 a. Giving a black powder when rub- 

 bed, Tritura atra. Of this kind 

 are, 



1. Steel-grained, from Adelfors, 

 in the province of Smoland. 



2. Fine-grained, fronv Dannemo- 

 ra, in the province of Upland. 



3. Coarfe-grained, from Kierrgruf- 

 van, in the province of Weft- 

 manland. 



This kind is found in great 

 quantities in all the Swedifh iron 

 mines -, and of this moft part of 

 the fufible ores confift, becaufe 

 it is commonly found in fuch 

 kinds of rocks as are very fufible : 



And 



