312 THE ATOMIC WEIGHTS. 



First, reduction of Ru0 2 : 



Ru. Per cent. Ru. 

 2.1387 1.6267 76.060 



2.5846 1.9658 76.058 



2.3682 i. 8016 76.075 



2.8849 2 - J 939 76.046 



Mean, 76.060, rb .0040 



Second, reduction of the salt RuCl 3 .NO.H 2 : 



Per cent. Ru. 



39-78 

 39.66 



Mean, 39.72, . 0405 



Third, reduction of RuCl 3 .N0.2NH 4 Cl : 



Per cent. Ru. 

 29.44 

 29.47 



Mean, 29.455, .0101 



Computing with = 15.879, .0003 ; N = 13.935, .0021, and Cl = 

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



1. From RuO 2 Ru = 100.922, .0178 



2. From RuCl 3 .NO.H 2 O " = 100.967, . 1 102 



3. From RuCl 3 .NO.2AmCl " = 100.868, .0387 



General mean Ru = 100.913, .0160 



If = 16, Ru=101.682. 



