ELECTRICAL TESTS .1X0 THEIR .ll'riJC.ITIOXS 



361 



\\ hen iho hattery is cuiinecltti a lurnnl will How inoim-niarily in the 

 cirruil charging the condenser ('. This will produce a throw of the 

 voltmeter neeilie, the amount of the deflection depending in)on the 

 cafKicity of the condenser C and the capacity between conductors. 

 If the lip and riii^; connections of the loop are reversed the \oil- 



Fig. S 



meter needle throw will be in the opposite direction from that ob- 

 tained in the first condition. The capacity of the conductors in the 

 loop is relatively small as compared to that of the conden.ser C so 

 that by knowing the throw which should be obtained under the test 

 conditions for known values of capacity a fairly g(K)d check of the 

 condensers in subscribers' sets is provided by this method of measure- 



