and the Theory of Atomic Structure. 



1099 



given in the diagram. The line K/3 3 has been detected by 

 de Broglie * only for the elements tungsten and rhodium. 

 The frequency-difference found by de Broglie for the lines 

 K/5 : and K/3 3 agrees very well with that for the lines L/3 3 

 and L/3 4 . The complexity of the line K/3 2 could not he 

 observed but is suggested by analogy with the pairs of lines 

 K/Sx-K/33, L/3 3 -L/3 4 , and Ly 3 -Ly 2 . In any case it is probable 

 that most of the energy of this line is due to the transition 

 N 5 ->K. The lines in the M-region have been measured by 

 Stenstrom and Karcher for different elements. It is highly 

 probable that there exist further transitions in this region, 

 other than those detected by Stenstrom. 



Diagram II. — Xenon. 



0, 



o 3X 



r^H 



as, 

 6 s t 



a 4't 

 64, 



as, 



6 if 



0,% 



Hi 



Ms 



Mi 



TTin 



i I ! 



l 1 \ 1 









i 



- 



My € 



1 



i i 



i 



I 



i 1 



! 





i ♦' 



\ 1 



{ f 1 I ) 



i 



1 



\ \\ 



i 1 1 







i 



i 



k 



Mjkjl 



M 1 



u it I 



/, Z? V, arj flip 



\ \\ i 



4/f 



{ i 







— ( ■ . ,. 



i 





1 







\ II 



■M, 



| 













u 



** 



§ 2. The diagrams II. and III. for the inert gases, xenon 

 and krypton, are derived from the experimental results given 

 in Part II. of this paper. As for the L-series we see from 

 the tables in Part II. that all the lines inserted in the 



* Comptes Rendus, clxx. p. 1053 (1920) and clxx. p. 1245 (1920). 



