Rontgen Radiation and Corpuscular Radiation, 455 



the value of k would take place. An indication of this is 

 seen in the values of II and Etc for silver as a tertiary 

 radiator and tin as secondary. 



Ffc. 3. 



Se Sr /lMho/hS.% 



50 100 50 



/l3oORPT/ON COSFF/CJEMTS IN /!i' 



The similarity between the variations in the values of k 

 for the corpuscular and k' for the tertiary Rontgen radiation 

 from iron and copper is very striking. The increase in the 

 values of h and k' to a maximum occurs suddenly in both 

 cases, and for the same penetrating power of the secondary 

 radiation. The values of k and k' then decrease in a similar 



2H2 



