156 



Prof. E. Taylor Jones on the Potential 



induction-coil, for which k 2 was 0*768, is shown in fig. 3 

 (cf. L c. p. 229, fig. 1). The gap used in this experiment 

 was 0*96 cm. wide, between brass balls 2 cm. in diameter. 



l-Fm. 3. 



u 



= 01 



025 



OS 



075 

 f 



10 



13 



i-0 1-2 



hi 



i.n 



K 















P 



K 



^cr^* 



=2^ 











V 



?•"*>-= 





o^V 





















01 0-2 



03 0-4 



c, 



05 06 07 Microfarad 



Capacity-potential curve for an induction-coil. &2=0768. 



The abscissa represents the capacity of the primary con- 

 denser, the ordinate the reciprocal of the least sparking 

 current in amperes. Values of u, found from measurements 

 of L 1 1 and L 2 C 2 , are shown above the diagram. 



Fig. 4. 



4 



u 



= 0O58 0/55 







0448 

 i 







10 

 09 

 08 

























































3 Microfarads. 



Capacity-potential curve for an induction coil with secondary condenser. 



& 2 = 0-815. 



Another example is shown in fig. 4. This was obtained 

 with the same coil when a Leyden jar (capacity 0*00104 

 microfarad) was connected with the secondary terminals 



