NEW ACTION PRODUCED BY "N" RAYS 33 



mentioned above, the increase in glow was 

 apparent on the two faces of the sheet. Given 

 that there is no rise in temperature, this seems 

 paradoxical ; for since " N " rays do not go 

 through platinum, it seemed as if the action 

 should only appear on the side exposed to these 

 rays. To reconcile these results, it was neces- 

 sary to suppose that " N " rays, which do not 

 traverse cold platinum, traverse it when incan- 

 descent. I then reverted to the apparatus which 

 was destined to show the action of " N " rays 

 on a small flame, and behind the quartz lens 

 I arranged a platinum sheet larger than the 

 lens. The interposition of a lead screen be- 

 tween the platinum and the source produced 

 no effect on the small flame, which verifies the 

 opacity of platinum. The plate being then 

 heated to redness, interposing the screen was 

 seen to diminish the glow of the small flame. 

 " N " rays issuing from an Auer burner traverse 

 therefore incandescent platinum. 



