Discharge in a Magnetic Field. 257 



sary to place the whole tube between the poles. If one of 

 the electrodes was placed between the poles it was generally 

 sufficient, provided that the plane of the tube was placed 

 equatorially. 



When such a tube was placed axially, as in fig. 17, the two 

 columns of bands appeared in each section of the tube. 



A tube constructed as in fig. 18 was then employed, the 



Fig. 18. 



^ ^ | ° 



end electrodes being joined together, the currents separated 

 from the centre to the end electrodes. But in this case the 

 path traversed by each current was practically equal in 

 resistance. 



Another tube therefore was employed where the distances 

 were unequal, as in fig. 19, the result being the same, and 



Fig. 19. 



4 * » 



conclusively showing that the alternate current can be divided 

 into its two constituents. 



A tube as shown in fig. 20 was now taken. The centre 



Fig. 20. 



3> 



3- 



bulb being placed between the poles of the magnet, and the 

 other two electrodes joined together, the alternate current was 

 divided into two currents, one in each arm of the tube. A 

 second similar tube was now connected with this one and 

 PldL Mag. S. 5. Vol. 42. No. 25(3. Sept, 1896. U 



