454 GOLD, PLATINUM, PALLADIUM, & c . 



was taken up. The platinum now remaining in 

 a state of purity, after being dried, weighed 12 

 grains ; consequently, the weight of the chloride 

 of sodium removed by the distilled water was 

 just 7\5 grains* From this analysis it follows, 

 that the triple muriate of platinum and soda is 

 composed as follows : 



Platinum . . . 12 



Chlorine ... 9 



Chloride of sodium ,. 7-5 



Water ... 9 



37-5 



In one portion of this salt which I examined, the 

 water, instead of 9 grains, amounted only to 8*31 

 grains, which would indicate only 7% atoms of 

 water instead of 8 atoms. The cause of this dif- 

 ference I am unable to explain : perhaps the 

 salt had been accidentally deprived of a portion of 

 its water. 



The constituents of this salt give us 12 for the 

 atomic weight of platinum, precisely like that of 

 the preceding salt. We may either consider it 

 as composed of 



1 atom bichloride of platinum =21 



1 atom chloride of sodium . = 7-5 



8 atoms water . . . =9 



