iSIO.] 



Chemical Analysis of certain Minerals. 



§1 



Titiclure galls lightish brown darkish brown. 



Query, whether the solution B, and the single globule from C, toge- 

 ther w'iih the Inst mentioned single grain pi ked out of No, 2, may be 

 considered as indicative ?f platina ? The silver ore No. 6 may perhaps 

 contain the following substances.— It was picked up in the same locali- 

 ty as No. 2, of the specimens mentioned m the foregoing paper. 



Silver. 



Antimony. 



Sulpl'n V, 



Carbon, or some carburet,. 

 Platina ? doubtful. 

 Silex. 



Earthy matter. 

 No. 6. iWan^^we.?^ ?— slightly magnetic. 



Blow-pipe — with borax, amethystine glass. Dissolved in muriatic 

 acid with heat, evolving chlorine. The solution behaved as follows. 

 Prussiate Potash — Green grey precipitate.. 

 A nmonia — B'"o\vn precipitate. 

 Carbonate Potash — do. 



The powder was tried with nitre, but no deflagration occurred. 



The specimens most interesting in the examination were the grey 

 silver ore, and the small metallic grriins j but all the specimens^ 

 M ere so minute in quantity that only a first rate analyst could pronounce 

 decidedly concerning the more difficult points. It would be dr^aroble 

 that the bed of the nullah and the hills immediately adjoining should be 

 inspected more minutely: it might repay the mineralogist, if not in 

 pocket, perhaps in the honour of new discoveries. — Captain Newboli> 

 was kind enough to assist me in these examinations. 



