28 " N RAYS 



On a New Action produced by " N " rays, and on 

 Several Facts connected with these Radiations 

 (July 20, 1903). 



The action of " N " rays on a small flame 

 gave me the idea of trying whether they did not 

 exercise an analogous action on a solid incan- 

 descent body. For this purpose a platinum 

 wire, about cr i mm. diameter and 1 5 mms. long, 

 was heated to dull redness by an electric 

 current. A pencil of " N " rays, emitted by an 

 Auer burner, was directed through wood and 

 aluminium screens on this wire, and was con- 

 centrated by a quartz lens. 



The wire was observed through a plate of 

 ground glass, fixed to the same support as the 

 wire itself, and about 3 cms. in front of it. On 

 displacing the wire, several foci were found, just 

 as with other processes employed to detect 

 " N " rays. The wire being placed at one of 

 these foci, the luminous patch on the ground 

 glass is seen to diminish in brightness when 

 a lead screen, or merely the hand, is interposed ; 

 when the obstacle is removed, the light resumes 



