1897.] HOUSTON, KEXXELLY — THE PATH OF A CURRENT. 165 



dense at B, as they are at A. Reflection with reversal of electric 

 flux takes place at the short-circuit under B^, so that, as shown in 

 Fig. 31, the vanguard of electric flux can rush back towards A.,, after 

 reflection from B._,, and having the direction represented by the up- 

 ward arrows, so that, at and near B,, as much electric flux is now 

 pointing downwards as pointing upwards. There is, consequently, 

 no resultant electric flux near B.^, although there is twice as much 

 electric flux, considered without regard to direction. The magnetic 

 flux is, however, doubled as determined by the reasoning accom- 

 panying Fig. 15. 



After the proper interval of time has elapsed, the vanguard of 

 electric flux has arrived at Ao, while further flux is all the time pour- 

 ing out of the dynamo; this condition is represented in Fig 32. 

 It again reflects at A3, with reversal of electric flux, and advances 

 once more towards B^, Fig. 33, in the original direction, so that 

 there are now two streams of downwardly directed electric flux, and 

 one stream of upwardly directed flux, leaving as a resultant a single 

 stream, but the magnetic flux is trebled in density. The resulting 



Rg 34 



%- 



Fi^.ss 



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^'5-3S _v 



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LE_ 



Fig sr 



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Fiq.38 



Figs. 34-38.— Movement of Electric Flux in Closed Circuit of Perfect Conduction 

 and Insulation when Supplied by a Generator of no Resistance at One End. 



condition is represented in Figs. 34 to 38, which correspond re- 

 spectively to Figs. 29 to 33. In the first passage between Ai and 

 Bi, the electric flux fills the entire insulator. In the next passage 

 between A3 and B3, Fig. 37, the electric flux entirely vanishes by a 

 process of cancellation of oppositely directed streams, but the mag- 



