244 



In the first case the potential will 

 be 



18,4, in the latter 13,44 E.S.E.. 



The capacity of the Leyden jar 



47T V öl eo/ 



47T V öl 02^ 



where Si was = 371,54 cm^ ^2 = 47,33 cm^ 

 e^ = 0,12 8 em 63 = 0,53 8 cm jD= 5,5 (the dielectric con- 

 staiit of the glass) 



1 = 1306,5 E.S.E. 



In the former case 



iI/= 0,80128-10-2 (3QU] and 



in the latter 



lf= 0,58528-10-5 COUl. 



For n sparke in minute 



nM 



-g^ = amp. 



With a new tube 26,6 cm long, the lacing in at 10,3 

 cm. from the lower end, the diameter 0,4 5, the foUowing 

 results were received: 



See Table of Obs. Series VI. 



If we take in to consideration here only the observa- 

 tions made in the same day, it follows that the drawn 

 waterquantity between O and 2 minutes is nearly propor- 

 tional to the time, but that it is not further augmented du- 

 ring the o'^ minute. As this fact stånds in close harmony with 

 the foregoing experiments, the time during which the cur- 

 rent was in activity was changed into 2 minutes. Further 

 the time between the moistening of the tube and the be- 

 ginning of the current was augmented from 0,5 minute to 

 1 minute in order to convince ourselves that no dröp was 

 formed before the current was put in activity. 



As this tube ^4 proved to give relatively good results, 

 a greater number of experiments were made during diflfe- 

 rent days at various dislances. If these observations are 

 ranged in two series after increasing distances we.shall have: 



