Hemsaeech & de Gramoxt. 



Phil.Mag.Ser. 6, Vol. 43, PI. III. 



Ultra-violet Spectra of Lead and Tin. 



Nature 

 of source. 



C: Spark lines. 

 1 ! \ / 1 / \ 1 / 1 \ 1 / 





{ 



Capacity) 



spark. I 



I 



r 



Water I 

 arc | 



I 

 f 



Ordinary ) 

 [ 













<3 N £ k co 



CO CO O) CD O) 

 C\, C\j C\j C\! <\j 



a. Arc and Spark Spectra of Lead. 



Ord/hary 



Spark lines. 



b. Arc Spectra of Tin. 



