1896.] Electricity thru' Dielectrics traversed by Rontgen Rays. 133 



Leakage of electricity through paraffin under different electro- 

 motive forces. 



Voltage. Time required to leak through 

 50 divisions. 



278 14 



208 21 



138 29-5 



73 565 



35 140 



Product of voltage 

 and time. 



3892 

 4368 

 4071 

 4124 

 4900 



Thus the conduction approximately obeys Ohm's law. 

 Leakage through sulphur. 



278 



208 



138 



73 



35 



10 



135 



21 



37 



67 



2780 

 2808 

 2898 

 2701 

 2345 



And again the conductivity approximately obeys Ohm's laws. 



On the law connecting the rate of leak through a dielectric with 

 the distance of the dielectric from the vacuum tube. In the experi- 

 ments made to investigate this law, the vacuum tube was placed 

 immediately behind a small hole in the metal tank enclosing the 

 coil and tube. Method B was used to measure the rate of leak, 

 the vessel in which the discs were placed being filled with paraffin, 

 as the leak through this gas is very rapid. 



The bulb used in the experiments (1), (2), (3) below was of the 

 shape shown in Fig. 1. The distance of the tip of the negative 



section of wall of tan 



5 positive electrode 



Fig. 1. 



