442 



APPENDIX. 



Table 518 (concluded Jrom p 403). 

 IONIZING AND RESONANCE POTENTIALS OF THE ELEMENTS. 



For further information and data see The Origin of Spectra, Foote and Mohler, 1922; Hughes, 

 Bull. Nat. Research Council, 2, 127-169, 1921; Report on Series in Line Spectra, Fowler, 1922. 



Smithsonian Tables. 



