ON WATE-LENGTH TABLES OP THE SPECTKA OF THE ELEMENTS. 181 

 Bromine — contimied. 



Double. t A mass of fine lines. 



DiDTMiuM Chloeide (Absorption). 



* ' Praseodi(l3-mium,' f ' Neodidymium ; ' vou WelsbacU. 



Erbium Chloride (Absorption). 



