CAPACITY AND RESIDUAL CHARGE OE DIELECTRICS. 
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upon, is placed in series with metallic resistances a, these forming one arm of 
the bridge, the condensers K^, K 3 forming the other arm. The stop e is connected 
to the junction between a and F ; and the junction of K^, K.j is connected to the 
case of the electrometer by the outer conductor of the insulated wire leading to the 
instrument. The whole of the pendulum arrangement is suppoi ted on paraffin feet. 
In the first instance pencil lines on glass were used for a, and Kg; but, 
for short times and varying current densities it was proved that these were 
R 2 
