A STUDY OF THE ABSORPTION SPECTRA 



OF 



SOLUTIONS OF CERTAIN SALTS OF POTASSIUM, COBALT, NICKEL, COP- 

 PER, CHROMIUM, ERBIUM, PRASEODYMIUM, NEODYMIUM, AND 

 URANIUM AS AFFECTED BY CHEMICAL AGENTS 

 AND BY TEMPERATURE 



BY 



HARRY C. JONES and W. W. STRONG 



