ATOMIC WEIGHTS 



469 



In his second paper Seubert gives fuller data relative to the potassium 

 osmichloride, but treats it somewhat differently. The salt was reduced 

 by a stream of hydrogen as before, but after that the boat containing the 

 Os + 2KCl was transferred to a platinum tube, in which, by prolonged 

 heating in the gas, the potassium chloride was completely volatilized. 

 The determinations of 4C1 as 4AgCl were omitted. Two series of data 

 are given, as folio avs : 



KMsCk. 

 1.1863 



.9279 

 1.094G 

 1.6055 . 



.4495 



.8646 



.7024 

 1.2742 

 1.04C6 



K,OsCh 

 2.2032 

 2.0394 

 2.7596 

 2.4934 

 2.8606 

 2.8668 

 1.2227 



Mean of all nine determinations, 30.941, ± .0079 



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

 be rejected. 



The ratios to examine are now as follows: 



(1). Per cent. Os in AnioOsClo, 43.459, ± .0036 



(2). 6AgCl: Am.OsCle: : 100:. 51.283, ± .0099 



(3). 4AgCl:K,0sC]«: : 100: 84.097, ± .0030 



(4). Per cent. Os in K,OsClc, 39.553, ± .0052 



(5). Per cent. KCl in K,OsCl„, 30.951, ± .0079 



To reduce these ratios we hav 



Ag = 107.880, 

 CI = 35.4.584, 



e- 



.00029 

 .0002 

 H = 1.00779, 



N =14.0101, ±.0001 

 K = 39.0999, ± .0002 

 .00001 



