Chemical and Physical Pavers. 59 



The capacity oi: the same condenser was measured by the first 

 method given in Carhart's "Electrical Measurements," article 107, 

 and was found to be .979 microfarads. The results show a sub- 

 stantial agreement of the two methods, and considering the greater 

 amount of time consumed and the liability of errors in this latter 

 method, it would seem that the method of using alternating cur- 

 rents is to be preferred even in the measurement of capacity. 



