On a new Metal, found in crude Plalina. 1 71 



piece of zinc, and the other examined by the following re- 

 agents. 



""(C 3.) Sal ammoniac occasioned no precipitation; but, 

 when a solution of platina v\as added to the mixture, a preci- 

 pitate was immediatelv formed, and the colour of this preci- 

 pitate was yellow ; which again proves, that the metal con- 

 tained in this salt is neither platina itself, nor diat which 

 gives the red colour to its precipitates. 



(C 4.) Prussiaie of potash occasioned no precipitation, 

 as it would have done if the solution had contained palla- 

 dium. 



(C 5.) Hydro-sulphurct of ammonia, which would have 

 precipitated either platina or palladium, caused no precipita- 

 tion of this meial. 



(C 6.) The carbonates of potash, of soda, or of ammo- 

 nia, occasioned no precipitation; but the pure alkalis preci- 

 pitated a yellow oxide', soluble by excess of alkali, and also 

 soluble in every acid that I have tried. 



(D 1 .) The solution of this oxide in muriatic acid, upon 

 being evaporated, did not crystallize; the residuum was 

 soluble in alcohol, and of a rose colour. Sal ammoniac, 

 nitre, or common salt, caused no precipitation from the 

 muriatic solution ; but formed triple salts, which were not 

 soluble in alcohol. 



(D 2.) The solution in nitric acid also did not crystallize. 

 A drop of this solution, beino- placed upon pure silver, occa- 

 sioned no stain. On the surface of mercury a metallic 

 film was precipitated, but did not appear to amalgamate. 

 Tlv.' metal was als(j precipitated bv copper and other metals, 

 as might be presumed, from the usual order of their affinities 

 for acid.=i. 



(E 1.) The precipitate obtained bv zinc (C2.) from the 

 remaining half of the salt, appeared in the form of a black 

 powder, weighing, when thoroughly dried, nearly 2 grains, 

 corresponding to about 4 grains in the 1000 of ore dissolved. 



{E.2.) When exposed to heat, this powder continued 

 black; with borax, it acquired a white metallic lustre, but 

 appeared infusible by any degree of heat. 



{K 3.) With arsenic, however, it is, like platina, ren- 

 dered fusible; and, like palladium, it may also be fused by 

 means of sulphur. The arsenic, or the sulphur, may be 

 f.xpelled from it by a ctmtinuance of the heat ; but the metal- 

 lic- button obtained does not become malleable, as cither of 

 - tlie preceding metals would be rendered by similar treat- 

 ment. 



(H 4.) It unites readily with ail metals that have been 



tried, 



