the Condense)' in the Induction Coil. 



Table V. 

 Four cells. Current = 2"1 amperes. 



415 



Eft 



— ! 



Optimum capacity in Microfarads. 



in ohms. 













Ec=0. 



Ec=l ohm. Ec=2 ohms. 



Ec=^ ohms. 



•00 



•030 



•184 -430 



1-051 



•35 



•132 



•350 ^703 



r750 



•71 



•172 



•470 108G 





1-06 



•237 



•589 1-586 





1-41 



•313 



•859 





1-77 



•388 



M63 





212 



•636 



1^578 





2^47 



•926 







2^82 



ri63 







Table VI. 





Four cells. 



Current = 



= 2'1 amperes. 



Ec 



Optimum capacity in Microfarads. 



in ohms. 

















E6 = -5 ohm. 



E6 = l ohm. 



Eft =1-5 ohm. 



E6=2ohms. 



•00 



•122 



•213 



■377 



•646 



•35 



•236 



•375 



•616 



1-163 



•71 



•340 



•536 



•850 



1-750 



1-06 



•418 



•726 



1-163 





1-41 



•480 



1-049 



1-700 





177 



•589 



1^450 I 





212 



•859 









2-47 



1-162 









2-32 



l'l-20 









4. The two parts o£ Rj play exactly the same part in tha 

 primary circuity and it is indifferent which of the two is 

 changed. The same is true for the two parts of R^. This 

 was proved by a number of experiments, although it might 

 have been presupposed. 



5. The optimum capacity is a function of the same form 

 both of Rj and Re. This is shown by the results already 

 giyen in figs. 5 & 6. 



6. The optimum capacity is a function of the inductance 

 of the primary. It varies less rapidly than a linear function, 

 and soon becomes practically independent of it. This is shown 

 by the results given in Table VII. and fig. 7 (PI. XVII.). They 

 were obtained by replacing the solenoid by a variable induc- 

 tance, keeping the current constant by putting in or taking out 



