J 134 



As will be also seen in Fig. 2 A the point for t = 50 falls outside 

 the curve and is evidently erroneous. 



Minutes 20 30 



By combining the pairs of values, which are sufficiently wide 



1 / 71C 1 ^ \ 



apart on this curve, the equation m= - [ ^ log ^ -\- 0,01i/ 1 



t V 0,434 " \—y 



nc 



gives the following figures for . (Table 2). 



^ ^ ^ 0,434 ^ 



The concentration of the hj'drogen-ions in this equation had to 



