454 T. Mizuno on the Action of the Coherer. 



Fig. 5. 



150 



140 



130 



OQ 



a 

 o 

 .2 

 a lao 



Ph 



110 



100 



so 



80 



70 



/f?/?>75S 



d?4 



7<? 



60 



so 



4-0 



30 



EO 



/O 



4 



So 



L BERING 



Fuse 





/0 20 O 



Number of Sparks. 



10 20 



