392 



Mr. A. S.Eve 



by an Ebert apparatus, for the mean value was then 5900 

 ions per c.c. 



The number o£ ions after the stated intervals can now be 

 calculated and a curve plotted, shown in fig. 7. The number 



Fier. 7. 



/ 2.000 



SOOOQ 



€000 



eooo 



zooo 



' 







B£A/1 YL A LCOHOL 



/ ONS RER C.C 









RE COM B 1 NATION CURVE 















°l 













N, < 



^ 













SS> ^° 









1 







so 



eo 



MIN CJTE £ 



<SO 



too 



tzo 



of ions satisfy, approximately, the well known recombination 



formula ^r " == -°^ whence a, the coefficient of recombination, 



n .N 



equals about 4 X 10 ~ 7 , instead of its usual value 11 x 10 _ 7. 

 The loss by recombination must actually be even slower than 

 here appears, because no allowance has been made for dif- 

 fusion and loss of charge to the sides of the vessel. It will 

 be noted that the assumption has been made that the ions 

 carry the usual ionic charge 3*4 x 10 _ 10 . The curve, fig. 7, 

 is an hyperbola drawn from theoretical calculation. The 

 experimental points show fair agreement. 



Electrometer Experiments. 



In order to test the accuracy of these deductions made 

 from experiments with an electroscope, some observations 

 were made with an electrometer. Dr. Bronson was kind 



