82 



Proceedings of Indiana Academy of Science 



was used which was not sensitive at the low values. The maximum 

 negative potential which the plate attained was 7 kv. with an im- 

 pressed voltage of 30 kv. between needles, which means that the voltage 



10 



30 



15 



40 



^o 



50 

 25 



60 

 30 



70 



35 



80 



40 



90 KlL0-VOUT5 

 AS T.^g^ tllMUTES 



FiK. 7. Rcctificfl current in nitropren. 



from the negative point to the plate was 8 kv., and from the postive 

 point to the plate was 22 kv. with the same current flowing at each 

 needle. 



