C *5» ] 



c. Black calciform Manganese, Black-Wad ; 

 of a greyifh, or iron-black colour ; found in K6- 

 nitz, Piedmont, Carinthia, Thuringia, England, 

 and Ireland. 



d. Siliceous Ore of Manganese; of a fteel-grey 

 colour, and lamellated texture ; combined with 

 oxyde of manganefe 35. Silex 55. Iron 5 ; 

 and argill 5. 



Q. SCHEELE. 



SCHEELE, Wolfram, or Tungsten ; of a grey, 

 ifh white, or yellowifh colour; granulated, friable; 

 is never found in the metallic ftate, but alone in the 

 ftate of calx, combined chiefly with calcareous 

 earth, manganefe andiron; it's oxyde is of an acid 

 nature, of a yellow colour, and enters into combi- 

 nation with all metals; it is foluble in the fulphuric, 

 nitric, muriatic, and nitro-muriatic acids, and is 

 converted by them into an oxyde, which combines 

 alfo with alkalis, but is precipitated again from 

 them by nitric acid. With the muriatic acid 5 the 

 oxyde aflumes a blue colour. 



a. Tunstatexf Lime*, Sparry Tunftate of Lime, 

 Tungften; combined with Tungftenic acid 44; 

 and lime 56 ; of a lamellar texture ; greyifli 

 white colour ; cryftallized in angular oclohedrons, 

 or double tetrahedral pyramids ; is 6 times hea- 



* Salt formed by the combination of the Tunftic acid with 

 different bafes. 



vier 



