xviii THE CLASSIFICATION OF THE ELEMENTS 489 



5 4 



WAVE LENGTH X 10 8 Cms. 



2 1-5 1 -9 -8 



3 



I 



benes 



^=h 



-KVSeries 



X*- 



10 12 14 16 18 20 



SQUARE ROOT OF FREQUENCY X 10' 8 



22 



FIG. 54. -HIGH FREQUENCY SPECTRA OF THE ELEMENTS. 



