935 Extract from the third Fulume of 



Analysis of the Tiing'ttcn Ore of Schlakenwald. 



Scheele found in tne calcareous scheelui of the ore of 

 Eitzberg in Sweden, 



Oxide of tungsten - - 6^ 



Lime - - - - 31 



Silex _ _ i. - 4 



100 



Messrs. d'Ellyar found tiirigsteil also in analysing the 

 wolfram ore of Linnwald. At the same time they gave the 

 following proportions for the white tungsten of Schlaken- 

 wald ; 



Yellow oxide of tungsten - 68 

 Lime * - - - 30 



9S 



Klaproth, in his new analysis of the grayish white scheclin^ 

 of Schlakenwald, pellucid and crystallized in octaedra, found 

 them to be very different. Its specific gravity is 6-01 5. 

 A hundred parts of these crystals of scheelin gave : 

 Yellow oxide of tungsten 77*75 

 Lime . '~. ^ 17-60 



Silex _ - - - 3-00 



98-35 



He extracted from lOO parts of the calcareous scheelin of 

 Pengilly in Cornwall : 



Yellow oxide of tungsten 75- 25 



Lime - - - - 18-70 



Silex _ _ - - 1-30 



Oxide of iron - - 1*25 



Oxide of man ofanese - 0*75 



97-45 



Kew Anahjsls of Gauol'm'ite found at Itterhj in Sweden i 



99-50 



AnahjsU 



