ApPLETOX & TAN DEE POL. 



Phil.-Mag.Ser.6,7ol.42.Pl.IX. 



C. 



D. 



E. 



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>TlME. 



A, B, C and D illustrate anode currents obtained with gradually 

 increased reaction. E is grid current corresponding to anode current D, 

 F is sum of D and E. 



