312 THE ATOMIC WEIGHTS. 



First, reduction of RuO.^ : 



RuO.,. Ru. Per cent. Ru. 



2.1387 i.bzd"] 76.060 



2.5846 1.9658 76.058 



2.3682 I. 8016 76.075 



2.8849 2.1939 76.046 



Mean, 76.060, ± .0040 



Second, reduction of the salt RuCl^.NO.HjO : 



Per cent. Ru. 



39-7S 

 39.66 



Mean, 39.72, ±. 0405 



Third, reduction of RuCl3.N0.2NH,Cl : 



Per cent. Ru. 

 29.44 

 29.47 



Mean, 29.455, rb .0101 



Computing with = 15.879, ± .0003 ; N = 13.935, ± .0021, and CI -- 

 35.179, =fc .0048, these data give three values for ruthenium, as follows 



1. From RuOj Ru = 100.922, ± .0178 



2. From RuCl3.NO.H2O " =100.967,^.1102 



3. From RuCl3.N0.2AmCl " = 100.868, ± .0387 



General mean Ru ^ 100.913, dr .0160 



If = 16, Ru= 101.682. 



