218 Dr. S. P. Thompson and Mr. Miles Walker on 



for the magnetic case. The image (fig. 7) of a current flowing 

 in any direction in a plane parallel to the mirror is another 

 current flowing parallel to the first and towards the same part. 



Fig. 6. 



vv\ 



^ 



^ 



Fig. 7. 



Fig. 8. 



r 



— 7\ 



i 



t i 



i 



w 



i 



y! 



i 



i 



i 



i , 



\ 



_„- iu 



N 



A North pole viewed from the front is equivalent to a laBVO- 

 cheiral circulation of current. The image of this pole turned 

 towards the mirror is, to the spectator, a dextro-cheiral circu- 

 lation, or a South pole. The same is true if, as in fig. 8, the 

 solenoid has its axis parallel to the plane of the mirror.. 

 In order to try some effects with an isolated pole, a solenoid. 



