zoz A S Y S T E M O F 



b. Yellow, from Baftnafgrufva at Ridr 

 darfhyttan in the province of Weft- 

 manland. 

 2. Spathofe, and with an unctuous fur- 

 face. 



a. White, from Marienberg and Al- 

 tenberg, in Saxony. 



b. Pearl - coloured, from Bifpberg 

 Klack, in the province of Dalarne *. 



SECT. CCXI. 



B. DiiTolved or mineralifed iron, Ferrum miner a- 

 lifatum. 

 i. With fulphur alone. 



a. Perfectly faturated with fulphur, Ferrum 

 fulphur e faturatum. Marcafite. See Sul- 

 phur, Seel:, clii. 



b. With very little fulphur. Black iron 

 ore. Iron ftone. Miner a ferri atra. 



This is either attracted by the load- 

 ftone, or is a loadftone itfelf, attracting 

 iron; it refembles iron, and yields a 

 black powder when rubbed. 

 i . Magnetic iron ore. Miner a ferri attrac- 



toria. The Loadflone, Magnes. 



a. Steel-grained, of a dim texture, 

 from Hogberget, in the pariih of 



* This kind of ftone is very feldom met with, but in fuch 

 places where black lead is common in the neighbourhood ; and 

 the hiftory of the black lead, inferted in the Memoirs of the 

 Swedifh Academy of Sciences, has induced me to believe, that 

 this may contain fome tin, which merits further examination. 

 Mr. Cronftedt has in the faid Memoirs communicated his ex- 

 periments upon this kind of ftone from Riddarfhyttan, and 

 Bifpberget in Weftmanland ; as has alfo Mr. Rinman, on a 

 great number of other martini earths. See the faid Memoirs 

 for the years 175 i and 1754. 



Gagncef 



