324 THE ATOMIC WEIGHTS. 



Os. Percent. Os. 



1.1863 .4691 39-543 



.9279 -3667 39-5*9 



1.0946 .433 39-558 



1.6055 .6351 39.558 



4495 .1778 39-555 



.8646 .3417 39.521 



.7024 .2781 39-593 



1.2742 .504! 39-562 



1.0466 -4H 1 39.566 



Mean, 39.553, rb .0052 



KfisClv 2KCL Percent. KCl. 



2.2032 .6820 3O.955 



2.0394 .6312 30.950 



2.7596 .8544 30.961 



2.4934 .77io 30.922 



2.8606 .8843 30.913 



2.8668 .5768 30.898 



1.2227 .3778 30899 



Mean, 30.931 



t/ 3 '- C 

 '130.973 



, 31.000 

 Earlier set. ' J 



Mean of all nine determinations, 30.941, dr .0079 



The single percentage of osmium in the earlier memoir is obviously to 

 be rejected. 



The ratios to examine are now as follows : 



(i.) Per cent. Os in Am 2 OsC) 6 , 43.459, dr .0036 



(2.) 6AgCl : Am 2 OsCl 6 : : loo : 51.283, dr .0099 



(3.) 4AgCl : K 2 OsCl 6 : : IOO : 84.097, .0030 



(4.) Per cent. Os in K 2 OsCl 6 , 39.553, dr .0052 



(5.) Per cent. KCl in K 2 OsCI 6 , 30.951, dr .0079 



To reduce these ratios we have 



Cl = 35.179, db .0048 KCl = 74.025, .0019 



K =38.817, rb .0051 AgCl= 142.287, rb .0037 



N = 13.935, .0021 



Hence there are five independent values for osmium, as follows : 



From (i) Os = 190.111, rb .0300 



From (2) " = 190.870, .0901 



From (3) " = 189.928, =b .0371 



From (4) " = 188.914, =b .0243 



From (5) " = 189.571, =b .0928 



General mean Os == 189.546, .0163 



If = 16, Os = 190.990. 



