Leonard and Whelan — Quantitative Spectra of Lithium, 6fc. 277 



EUBIDIUM. 



Rubidium chloride solutions were examined with gold and copper 

 electrodes. The lines did not exhibit any remarkable persistency, only one, 

 X 4571'S, appearing with the -1% solution. 



Quantitative Spectrum of Rubidium Chloride. 



Caesium. 



The solution of the chloride showed a fair number of lines, 

 persistent were at XX 4593-5, 4555-5, 4540-2, and 2525-8. 



Quantitative Spectrwni of Caesium Chloride. 



The most 



