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ACCOVNT OF CERIUM. 



XVII. 



Account of Ceriu7n, a new Metal found in a mineral Suhjlanct 

 i from Bufifuis, in SKedcn. By W. D*Hesincek. ard 

 J. B. Bergelius *. 



DlfcoTery of a 

 new fubftance 

 m tungftein. 



Where found. 



Dtfcription of the Tungfiein of Bafinas, 



i\LTHOUGH this fubftance has been formerly affayed hj 

 Scheele and D'Elhuyar, under the name of wolfram, its con- 

 iiderable weight, neverthelefs, determined us to fubmit it to 

 farther enquiries. Our principal object was to find yttria in 

 it, which, being unknown at the time in which thefe chemifts 

 operated, might have efcaped their attention. Our fuppofi- 

 tion was not well founded, fince, inftead of an earth, we 

 difcovered a fubftance which, according to every appearance, 

 is hitherto unknown, as will be feen in the fequel. 



The tungftein of Baftnas, which we call cerite, for reafons 

 which will be prefently given, was found, in the year 1750, 

 in a copper-mine called Baftnas, or Saint-Gorans Koppar- 

 grafva, at Riddare-Hyltan, in Weftraannia, of which, with 

 an)eftos, it formed the matrix : but after this time it was Im- 

 bedded in quartz and mica, to the depth of feventeen toifes. 



* From the Swedlfti, by G. A. Linbomi but here tranflated from 

 the Apnales de Chimie> L. 145. 



The 



