10- D. A. Kr eider — Iodine Titration Voltameter. 



The titrations in the experiments recorded in this table were 

 made with due regard to all possible sources of error. The 

 solutions were brought precisely to the temperature of 20°, at 

 which temperature the room was maintained. The burettes 

 had been thoroughly cleaned with chromate solution, and of 

 course, ample time was allowed for the burettes to drain to 

 a constant reading. The results show that the iodine voltam- 

 eter, even after the correction for the blank determinations, 

 run uniformly higher by from O06 per cent to *09 per cent ; 

 but that they agree among themselves to an order of accuracy 

 of about 1 part in 10,000. 



Sloane Physical Laboratory, 



Yale University, June 5, 1905. 



