Simons. 



SILVER 



AS 



Phil. Mag. Ser. 6, Vol.41. PL III. 



Fig. 4. 



Atomic Nunler cf Screen. 



i I 1 1 T- 



BARiUM as RADIATOR. 



Ol oz 



0-3 IX. OS &6 o/< 



es from the screen as measured in air at 0°C. and 

 nates ; — — l6g e (N — JXx), taken from figs, o and (>. 



Fig-. 7.— Ordinates (N — N r ) presenting a change of 2-626 in this function and on 

 planes in air, at 0° C 

 ated screen as marl 1 

 /3-rav energy to be tl 



value of log e (N\, — N. r ) is placed on each curve 



}f energy crossing planes successively distant iron: 

 change at the distance indicated. 



