1920. No. 2. 



ON THE X-RAY SPECTRA. 



25 



N 



to 

 Se 



Vo - 

 SO - 



^, 



1-- 



130 



I Expérimenta/ Curve 



H curve of Debye 



M -.- -H- Ve^arà /q -- /2) 



Fig. 2. 



2Û JO 



Atomic Numàer 

 Fig. 3- 



AI 



The curves III', and I. runs more 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 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 hypethesis of recombination between primaries and preservation of 

 momentum. 



The assumption of 8 electrons in the third ring, however, holds in 

 this respect a somewhat stronger position. 



