246 



Sir David Salomons, Bart. 



[June 21, 



Experiment 11. 



Tabes are employed as shown in fig. 11. They consist of plain 

 tubes, the ends of which are expanded into bulbs that contain the 



electrodes. Glass balls are blown on the contracted portions, so thnt 

 these glass balls become the electrodes for the tube proper wholly 

 and solely by induction, there being no connexion between the glass 

 tube proper and the electrodes, except through the glass of these 

 balls. Again the effects produced are the same as if the current 

 were passed without the inductive process, i.e., the bands are pro- 

 duced in a similar manner. 



