564 



Al spectra. 



Cu-spectra. 



Spark. 

 Eleclrolytechromoscope. 



Metalchromoscope. 

 Are. 



Spark. 

 Eleclrolytechromoscope. 



Are. 

 Metalchromoscope. 



Strontium. 



Copper. 



Mg-spectrum in d.electrolytechromoscope 



Mg-arcspectrum. 



Strong solution. 

 Dilute solution. 



160—180 V. 68 rain. 

 < 100 V. 136 min. 



Spectra obtained with the electrolytechromoscope. 

 Fig. 3. 



