72 



PROCEEDINGS OF THE AMERICAN ACADEMY. 



TABLE OF RESULTS. 

 Series I. 



amount of the error due to occlusion usually almost balances the 

 error due to the solution of the precipitate, so that the final uncor- 

 rected result closely approximates the true one. The average of these 

 uncorrected results is 0.3215 instead of 0.3214. 



Since the amount of argentic chloride obtained from four fifths of a 

 gram of baric sulphate varied from 0.0005 gram (No. 3) to 0.0152 

 gram (No. 10), it becomes important to define the exact circumstances 



