1909] OF VARIOUS SALTS IN SOLUTION. 209 



tion to any deviation hitherto found either in this work or in 

 that of Jones and Anderson or Jones and Uhler. The absorption 

 of the more dilute sokitions was found to be proportionately much 

 greater than for the more concentrated solutions. A similar run 

 was made for a solution of the acetate in methyl alcohol and a 

 deviation from Beer's law in the same direction was found, although 

 the amount was not so great in this case. 



(c) The Uranyl Bands of the Acetate. 

 The following table gives the approximate wave-lengths of the 

 uranyl bands of the acetate in water, in methyl and as the anhydrous 

 powder. 



Bands of Uranyl Acetate. 



abcdefghi 

 In Water 4910 4740 4595 4455 43io 4160 4070 3970 3830 



In Methyl Alcohol 4900 4770 4600 4460 4320 4200 4090 

 As Anhydrous Salt. 4910 4760 4610 4460 4330 4190 4070 3980 



From this table it seems that the positions of the bands of the 

 acetate under these different conditions is about the same. 



(d) Absorption Spectrum of Uranyl Sulphate. 

 The mapping of the absorption spectrum of uranyl sulphate in 

 water showed that it was very much like that of the nitrate in 

 water. As in the case of the nitrate the i band was much weaker 

 than the adjacent bands. Beer's law was found to hold. The 

 addition of a large amount of sulphuric acid was found to make 

 the uranyl bands much sharper, but not to cause them to shift. 

 Much more work will be done on the effect of strong acids on the 

 uranyl bands. The following gives the wave-lengths of the sulphate 

 bands : 



a b c d e f g h i j k I 



4900 4740 4580 4460 4330 4200 4070 3970 3850 3740 3630 3530 



V. The Absorption of Neodymium Chloride in Glycerol and 

 Mixtures of Glycerol and Water. 

 The absorption spectrum of a glycerol solution of neodymium 

 chloride is much like that of the aqueous solution in its general 



PROC. AMER. PHIL. SOC. XI.VIII. I92 O, PRINTED SEPTEMBER 3, I909. 



