May. 191 f 



KNOWLEDGE. 



139 



. 



Sodium and Lithium. Flame Spectrum. 





i 



Lithium Spark. Spectrum. 





a ;■ S 

 Zinc Spark. Spectrum. 



/.><• 14 . ■ iSlf 





Cadmium Spark. Spectrum. 



Ol* III! • 



U,i !(••> 



ililiiiiljiiilnnliiftliii]liii i liii 



tt, y s 



a, (,u 



Coppe] ( Monde, hii.ii i. S] i eti urn, 





!-••> 



3 5 



* Y 



Coppei I iii' 'i ide. Fla me Spectrum. 

 1 i .i i i 123. 

 (After Lecoq de Boisbaudi 



