Hemsalech & de Gramont. 



Phil. Mag. Ser. 6, Vol. 43, PL XXI, 



Arc and Spark Spectra of Cadmium, 



spark line 



Nature cr> 



of source. f\j 



spark lines. 



M ^ Sf 



M MM 



Ml M <V 



M M 

 M M 



b. 



Water arc. 



\ graphite. 



so o 



Cd. 



