108 



THE ATOMIC WEIGHTS. 



Wt. Au. 



10.3512 

 8.2525 

 8.1004 



3-2913 



3.4835 

 3.6421 



Vol. H, cc. 



1756.10 



1400.38 



1374.87 



558.64 



590-93 



Wt. H. 



.157824 

 125857 



.123565 

 .050206 

 .053109 

 055551 



Hence for the ratio H 3 : Au : : 1 : x we have : 



65-587 

 65-571 

 65.557 

 65.556 

 65o93 

 65.563 



Mean, 65.571, .00436 



And H : Au : : 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 : 



(l.) 2KC1 : Au : : 100 : 263.730, .026 



( 2 -) 3^gCl : Au : : 100 : 45.824, ; .0020 



(3.) KAuBr 4 : Au : : 100 : 35.461, db .0028 



(4.) Au : AgBr : : 100 : 95.222, .0056 



(5.) Au : Br 3 : 



(6.) Au : KBr 



(7.) Ag : Au : 



(8. 



(9.) H : Au 



: IOO : 121.678, db .OIOO 

 : : TOO : 60.338, d= 0015 



100 : 182.778, d= -0055 



loo : 49.474, .0021 

 196.722, dr .0129 



For the reduction of these ratios the antecedent data are : 



Ag= 107.108, zb .0031 

 Cl == 35.179, d= .0048 

 Br = 79-344, .0062 

 K = 38.817, d= .0051 

 N = J 3.935, .0021 



C = 11.920, dr .0004 

 AgCl 142.287, .0037 

 AgBr = 186.452, d= .0054 

 KC1 = 74.025, .0019 

 KBr = 118.200, .0073 



Hence for the atomic weight of gold we have nine values : 



From (i) Au = 195.226, .0193 



From (2) 

 From (3) 

 From (4) 

 From (5) 

 From (6) 

 From (7) 

 From (8) 

 From (9) 



195.605, d= .0099 

 = I95-7 11 , .0224 

 = 195.808, d= .0126 



= 195.624, .0222 



= T 95- 8 96, db .0131 

 = 195.770, db .0082 

 = 196.238, =h .0224 



= 196.722, .0129 



General mean Au = 195.850, dz .0044 



If = 16, this becomes Au = 197.342. 



