OF ARTS AND SCIENCES. 



173 



ATOMIC WEIGHT OF OXYGEN. 



Average = 15.954 ± 0.0048 



Series II. 



0.4112 

 0.4089 

 0.4261 

 0.4197 

 0.4144 



3.6930 

 3.6709 

 3.8253 

 3.7651 

 3.7197 



15.962 

 15.955 

 15.955 

 15.942 

 15.953 



Average 



= 15.952 ± 0.0035 



Total average = 15.953 ± 0.0017 



Dumas's value = 15.960 ± 0.0070 



