±66 



Mr. J. D. Morgan on Impulsive 



would produce a spark at a number of different gap settings. 

 For measuring the voltages a thermionic valve was used in 

 conjunction with an electrostatic voltmeter. The results are 

 also shown by figure 3. Finally, with the same measuring 



Fig-. 3. 



6 h 





i 



1 





i 



1 



I 

 1 



i 





! \ 











Impulsive 

 rn Primary / y 



// 



1 



/]/ S-taid 



/ /\ vo!~taci§ 







// 



































02 -03 -04 



Wfdt.h cf Gap 



05 



■06inchc?; 



apparatus, the variations of V with i were found for each 

 setting. These are given in figure 4. It will be observed 

 that the carves obtained all have the same general character 

 as the hypothetical curve given in figure 2. From the 



