the AncihjseS of M. KtapvGih. 535 



3d, That of Nagyac, which is more compounded. It 

 contains 



TeHurimn ----- 44' 75 



Gold ------ 26-75 



Lead ------ i9-.5o 



Silver ------ 8-50 



Sulphur ----- 0-50 



100 



■ilh, Thefoliaceous ore of Naayac. It contains 

 Lead ----- 34-0 



Tellurium ----- 30' 2 



Gold - - - - - - yo 



Silver - - _ _ _ - 0*5 

 Copper - - - - - _ 1-3 



Sulphur ----- 3-0 



100 



An Account of some new Properties of Tellimiim, 

 Mercury seems only to be weakly attracted by this metal. 

 One part of tellurium pulverised and heated in a small 

 retort with six parts of mercury, seemed to be united into 

 an amalgam with a crystallized surface. But M. Klaproth 

 found that the mercury had scarcely dissolved any of the 

 tellurium, and ihat the former had only covered the surface 

 of it under the f )rm of small scales. 



The solution of tellurium in muriatic acid is clear. If 

 water be added to the saturated solution, it first produces a 

 precipitate, which a greater quantity of water afterv/ards re- 

 dissolves. But if alcohol be poured in instead of water, and 

 if the precipitate be edulcorated with alcohol, scarcely any 

 tellurium will remain in the solution. Precipitates obtained 

 by alcohol or by \\ater are not pure oxides of tellurium. 

 They always retain a little muriatic acid. 



Solutions cf tellurium where the acid predominates a 

 little, are neither rendered turbid nor produce any precipi- 

 tate by those of prussiate of potash. This is a remarkable 

 property of thi:; mclal, which it however participates with 

 gold, platina and antimony. Tincture of gall-nuts poured 

 into a solution of it gives a flaky precipitate of an Isabella 

 colour. Phosphorus inmicvsed in a muriatic soluti(jn of 

 tellurium becomes covered in the course of tunc with me- 

 luUic leaver. 



Analys'is 



