> 4 



Negative 

 Glow. 



2 3 45678910 

 Faraday Dark Space. 



+ 



12 \3 c/ns. 



Diagram No. 1. Discharge in Air. Pressure 2-4 mms. Magnetic Field 29-4. 



5 

























) 



C 







































4 



































































3 



























_; 



<■ 







fl 

































2 



X 





























































































1 

































+ 



W/s 













W?K 



4 









^ 



^ 



I" 





L... ~ 





r-. ..." 



V////// 



^ 







2 3 4 

 Positive Column. 



7 8 9 10 

 Faraday Dark Space. 



13 cms. 



Negative 

 Glow. 



Diagram No. 2. Discharge in Air. Pressure 0-5 mm. Magnetic Field 22 -1. 



