32 



STUDY OF ABSORPTION SPECTRA 



character were obtained in each series of measurements. The curves 

 for sodium nitrate (figs. 17 and 18) were plotted from the results given 

 in column 5, tables 12 and 13. 



The solution of sodium nitrate, as is the case with all the other 

 non-hydrated salts, is less transparent than the solvent at the center 

 of both bands. The difference is quite marked for this salt. The 

 solution curve for both bands is very much more elongated than that 

 for the solvent. At the point of maximum absorption it shows the 

 greater absorption, and at the point of maximum transparency the 

 greater transparency. 



TABLE 12. Magnesium nitrate, ammonium bromide and 

 sodium nitrate. 



