24 On Radiant Matter. 



phorescent screen, or by disconnecting one negative pole, 

 only one stream. 



FIG. 18. 



If the streams of Radiant Matter carry an electric current 

 they will act like two parallel conducting wires and attract 

 one another ; but if they are simply built up of negatively 

 electrified molecules they will repel each other. 



I will first connect the upper negative pole (a) with the 

 coil, and you see the ray shooting along the line d, f. I 

 now bring the lower negative pole (b) into play, and another 

 line (e, h) darts along the screen. But notice the way the 

 first line behaves; it jumps up from its first position, d f, 

 to dg, showing that it is repelled, and if time permitted I 

 could show you that the lower ray is also deflected from its 

 normal direction : therefore the two parallel streams of 

 Radiant Matter exert mutual repulsion, acting not like cur- 

 rent carriers, but merely as similarly electrified bodies. 



Radiant Matter produces heat when its motion is arrested. 



During these experiments another property of Radiant 

 Matter has made itself evident, although I have not 

 yet drawn attention to it The glass gets very warm 

 where the green phosphorescence is strongest. The 

 molecular focus on the tube, which we saw earlier in the 

 evening (Fig. 8) is intensely hot, and I have prepared an 

 apparatus by which this heat at the focus can be rendered 

 apparent to all present. 



I have here a small tube (Fig. 19, a) with a cup- 

 shaped negative pole. This cup projects the rays to a 

 focus in the middle of the tube. At the side of the 

 tube is a small electro-magnet, which I can set in action 

 by touching a key, and the focus is then drawn to the 



