METALS. 92. Tellurium. 29J 



Found m Bohemia, Saxony, Dauphiny^ and Hungary, it is totally 

 foluble in nitro-muriatic acid, decrepitates in the fire, and 

 eafily melts when powdered, evaporating in a white fmoke ; 

 with borax it leaves a metallic bead : accordmg to Klaproth 

 it is nothing more than a white oxyde of antimony, contjin* 

 ing, oxyde of antimony 86, oxydes of antimony and iron 3, 

 filici 8. 



92. TELLURIUM. Bluiflvwhite, foft, very brit- 

 tle and eafily reducible to powder, of a lairellar 

 texture, fpeclfic gravity 6,115: melting in a 

 heat fomewhat above the fufing point of lead, 

 and if the heat be a little increafcd boiling and 

 evaporating, attaching itfelf in brilliant drops to 

 the upper part of the retort ; before the blowpipe 

 burning with a lively blue flame, the edges of 

 which are green, and at laft evaporating in a 

 while fmoke fmelling like radifhes: partly folu- 

 ble in concentrated lulphuric acid and giving the 

 folution a crimfon red colour, which precipitates 

 a white powder on the addition of a large quan- 

 tity of water* 



natimum. Soft, heavy, fomewhat du£lile, with metallic luftre, 

 Sylvanite. Kirnvan miner. 2, p. '^2^ 

 Native tellurium, Thomfon chem. 4 /• 97. 

 Found in the mine of Mariahtf in the Facehay Inountains of 



franfylnjania, maffive and dilfeminated : contains tellurium 



92,55, iron 7j20. gold 0,25. Klaproth. 



graphicum. Tin-white or inclining to yellow, foft, brittle, ftaining a 

 little, in fmall pril'matic cryftalsolten grouped in fuch 

 a manner as to referable written char-i£lers. 



Graphic Tellurium. Thom/on chem, 4. p 98. 



Found in the Francifcus mine at Offenbanga in Tranfyl^aniay 

 with metallic luftre : fpeclfic gravity 5,723. contains tellu- 

 rium 60, gold 30, filver 10. Klaproih* 



album. Silver-white pafling into brafs yellow, foft, heavy, fome- 

 what dudile, with metallic luftre. 

 White tellurium. Thomfon chem^ 4. /», 98, 



VOL. vn. — p p 



