46 STUDY OF ABSORPTION SPECTRA 



cent alcohol, the alcoholate band has its center at \ = 0.749^, the dis- 

 placement here being about 100 A. u. For the second band the dis- 

 placement is only about 40 A. u., while for the third it is over 100 A. u. 

 When the percentage of alcohol is below 90, the bands for the mixed 

 solvents are only slightly displaced towards the red, the greatest change 

 taking place between 90 and 100 per cent alcohol. 



Similar experiments were carried out with anhydrous neodymium 

 chloride dissolved in pure glycerol and in water. The salt was also 

 dissolved in mixtures of the two solvents. The glycerol bands were 

 very slightly, if at all, displaced towards the longer wave-lengths. 



It gives us pleasure to express our thanks to Professor H. A. Pfund 

 and to Professor John A. Anderson, for many valuable suggestions 

 during the progress of this work. 



