122 DE. W. G. DUFFIELD, MESSRS. THOS. H. BUKNHAM AND A. H. DAVIS ON 



TO O 



Fig. 14, From Tables VI. and VII, 



Amperes 



"To 



i-5- 



I-O- 



gj 



1C 



a 



0-5- 



Anode 

 6mm, 



Series B 



Tdble 5 



o Series B 

 Table 6 



Series C 

 Table 7 



l-O - 



tfj 



I 



0-5 - 



<u 



M 

 tfl 



<n 

 



Si 



O 



O 



7 



Ampere; 



Fig. 15. 



f r 



Fig. 16. From Table V. 



