Magnetic Field upon Electric Discharges in Vauo. 181 



Experiments were also tried with the tube reversed as shown in 

 fig. 3. In this case the internal resistance was affected by the 

 magnet just as it had been previously. The appearance of the tube 

 was also altered by the diminution almost to vanishing point of the 

 green fluorescence, the presence of very bright blue luminescence on 

 the under side of the cathode next the magnet, some less bright blue 

 fluorescence near the anode, and a considerable amount of faint blue 

 luminescence throughout the remainder of the tube. 



In this case, as in the other, the tube reverted to its normal 

 appearance as soon as the magnet was demagnetised, and the appear- 

 ance was the same whether the pole of the magnet next the tube was 

 north or south. 



