OF ARTS AND SCIENCES. 



171 



Weight of H 2 S0 4 tube, 



before combustion = 62.3959 

 after " = 66.1076 



Gain in weight = 3.7117 



h = 29.58 

 h = 29.75 



+ 0.17 



26.5 

 23.5 



3.0 



The correction to vacuum for 3.7117 grams of water weighed with 

 brass and platinum weights is 4.1 mg. 



Gain in weight of H 2 S0 4 =3.7117 grams. 



" " P,0, =0.0030 



Correction to vacuum = 0.0041 



" for t and h, P 2 5 = 0.0004 



H 2 S0 4 = 0.0005 



a 

 a 

 u 



Total H 2 formed 

 Weight H taken 



Weight O combined 

 Atomic weight of Oxygen 

 % H in water = 11.140. 



= 3.7197 

 = 0.4144 





= 3.3053 " 

 2 x 3.3053 



15.953 



0.4144 

 % O in water = 88.860. 



Series III. Determination 5. 



Average " =0.1120 



