34 "N RAYS 



On New Actions produced by "TV" rays 

 Generalization of the Phenomena already 

 observed (November 2, 1903). 



When a pencil of " N " rays is directed 

 either on a small spark, flame, or a phosphores- 

 cent substance previously exposed to the sun's 

 rays, or, again, to a platinum plate heated to 

 dull redness, the light emitted by these various 

 sources is seen to increase in glow. In these 

 experiments, one operates on sources emitting 

 light spontaneously. I asked myself whether 

 one could not generalize these experiments by 

 using a body not emitting light itself, but 

 reflecting that which reaches it from an ex- 

 ternal source. I consequently carried out the 

 following experiment : a slip of white paper, 

 1 5 mms. long and 2 mms. broad, is fixed verti- 

 cally to a wire holder ; the room being made 

 dark, the slip is dimly lighted by projecting 

 laterally on it a pencil of light, emitted by a 

 small flame shut up in a box, in which a vertical 

 slit is pierced. 



On the other hand, the rays are produced 



