256 



Sir t)avid Salomons on the Electric 



Returning once more to the vacuum-tube, we observed the 

 separation of the alternate current within it into two distinct 

 paths. It occurred to me that it might be possible to com- 

 pletely separate the two currents. I therefore constructed 

 tubes as shown in figs. 15, 16, and 17, in order to observe 



Fig. 15. 



Fig. 16. 



Fig. 17. 



/y 



whether the currents would be separated into the tubes, which 

 on experiment I found to be the case. It was not neces- 



