ATOMIC WEIGHTS 



175 



Wt. All. 

 10.3512 



8.2525 



8.1004 



3.2913 



3.4835 



3.G421 



Hence for the ratio 3H : Au 



And H: An:: 1: 196. 713, ±.0131. This, combined with the value 

 found in the preceding series, gives a general mean of 196.722, ±.0129. 

 The ratios available for gold are now as follows : 



(1). KCl:Au::100:263.730, ±.026 



(2). 3AgCl:Au: : 100: 45.824, ± .0020 



( 3 ) . KAuBr, : Au : : 100 : 35.461, ± .0028 



(4). Au:AgBr:: 100: 95.222, ±.0056 



(5). Au:3Br: : 100: 121.678, ± .0100 



(6). Au:KBr: : 100: 60.338, ± .0015 



(7). Ag:Au: : 100: 182.778, ± .0055 



(8). NC3H,oAuCl,:Au: : 100: 49.474, ± .0021 



(9). H:Au::l:196.722, ±.0129 



The antecedent atomic weights are- 



Hence. 



5 ...■ 197.044, 



2 197.050, 



3 197.131, 



7 197.181, 



4 197.223, 



6 197.255, 



8 197.728, 



9 198.254, 



.0163 

 .0086 

 .0178 

 .0060 

 .0116 

 .0049 

 .0118 

 .0130 



General mean, Au = 197.269, ± .0030 



