ATOMIC WEIGHTS 211 



In a later note/ Parsons combined the two series of determinations, 

 and deduced simultaneous values for Gl and C. If = 16, and H = 

 1.008, then Gl = 9.112, and C = 12.007. These figures furnish a good 

 check upon the general accuracy of the manipulations. 



The atomic weight of glucinum is now fixed by the following ratios: 



(1). G10:BaS04: : 100: 922.977, ± .805 

 (2). 4C0,:G10: :79.423, ± .0052:11.433, ± .081 

 (3). G1S04.4H.0:G10: : 100: 14.153, ± .0014 

 (4). Gl(C5HvO,)2:GlO::100:12.1124, ±.0025 

 (5). Gl,0(aH30,),:4G10: :100:24.698, ± .0025 



Eeducing these ratios with 



we have — 



From ratio 3 Gl = 9.0805, ± .0025 



" 4 9.1032, ± .0052 



" 5 9.1061, ± .0027 



" 1 9.2912, ± .0221 



" 2 9.3375, ± .1775 



General mean, Gl = 9.0945, ± .0017 



The last two values are evidently worthless, but they carry practically 

 no weight in the combination. For all practical purposes the atomic 

 weight of glucinum may be taken as 9.1, which must be very near the 

 true value. 



1 Journ. Amer. Chem. Soc, 27, 1204. 1905. 



