﻿On the Electrification of Air. 



231 



machine stopped turning. The spot was off the scale, and 

 nine minutes elapsed before it appeared on the scale. The 

 first reading on the curve was taken one minute after- 

 wards, or ten minutes after the machine stopped turning 

 (35-25 volts). 



Curve 3. March 12, 1894. — A Voss induction -machine 

 was joined to the charging wire, and run by an electric motor 



6 



7 

 6 



5 

 4 



3 

 2 



I 





 I 



2 

 5 

 4 

 5 

 6 

 7 



6 



for 4 hours 19 minutes. A test was applied at the beginning 

 of the run to make sure that it was charging negatively ; and 

 a similar test when it was disconnected from the charging 

 wire in the vat showed it to be still charging negatively. 

 The water-dropper was joined to the electrometer, and the 

 spot appeared on the scale immediately. The first reading 

 on the curve was taken half a minute after the machine was 

 disconnected (30*65 voltsj 



















































w 



Curvi 



'4.A.J 



T ter c 



harq 



Apri 

 inq p 



ositix- 



ely a 



urin 



q 30 s 



econc 



• s 



























«. 

























*2 























































Ti 



me i 



n m 



inut 



ZS 















* 7 



> * 



I 



) t 





t 

 —At' 



5 i 



end c 



fl2m 



Q— 

 inute 



9 

















read 



ing m 



'as o- 



t volt. 





s 



















































Curv< 



• 5. A 



fterc 



harqx 



April 

 ngne 



2<y 94 



gatii) 



ely d 



urirtt 



30 se 



conds 





























r 

















































