258 



Dr. L. Vegard on the X-Hay Spectra 



II. and IV. first increases to a maximum for N = 18 and then 

 decreases quite considerably till N = 22. Then the curve II. 

 has a point of inflexion and runs more nearly parallel to the 

 experimental curve. 



Fn 





10 20 30 



i*0 



50 60 ~>M 



10 



1 J 1 



i 



1 / 1 



•20 



" 







30 



>v 









\ \ \. 





A 



«f0 









SO 







F>IF 





\ \ 





! I'M 



| 60 



\ \ 

 \ \ 





>'/' 



^ 7 







''/' 





\ N \ 





! ! 



80 



\\\ 





,'// 









> ' 



90 



\ s\ 





</' 





\\\ 





>/f 



100 







f / ' 





/ C <J rise of ' Oedye ■ \ 





* / f 

 / / • 



110 



\ \ 





/ / . 





U „ „ Vegartf y = f2 \ 



s 



^o-- 





120 











~m ,. „ „ ?f s 





— / 



130 



IZ Ex pen mental curve 







The peculiar variation of the distance between the two 

 curves II. and IV. is shown in fig. 3. 



The curves III. and IV. run more nearly parallel ; but 

 also in this case they show at the beginning a somewhat 

 different curvature. Their distance first increases to a 

 maximum and then diminishes slightly, as indicated by the 

 dotted curve in fig. 3. 



I think that from the preceding test we are justified 

 in concluding that the assumption of 12 electrons in the 

 third ring is inconsistent with the hypothesis of recombination 

 between primaries and conservation of momentum. 



