156 A STUDY OF THE ABSORPTION SPECTRA. 



Plate 97. A. Uranous Acetate in Water to which Nitric Acid is added. 



B. Uranyl Nitrate in Strong Nitric Acid. Strip 1, 1.2 mm. of solution then 2, 



3, 5, and 12 (4 mm.) drops of Hydrochloric Acid was added. The last 



strip shows the absorption of 9.5 mm. of the solution. 

 Plate 98. A. Uranous Chloride to which a concentrated solution of Aluminium Chloride 



is added. Strip 1, 3 mm. of Uranous Chloride solution plus 1 mm. 



A1C1 3 ; strip 2, the same to which 2 mm. of A1C1 3 solution is added; 



strip 3, to which 10 mm. more of A1C1 3 is added; strip 4 is a 3 mm. 



solution of Uranous Chloride, and strip 5 is the same to which 13 mm. 



HC1 has been added. 

 B. (1) Uranous Chloride in Water, 4 mm.; (2) plus Methyl Alcohol to 6.3 mm.; 



(3) plus Methyl Alcohol to 7.5 mm.; (4) Uranous Chloride in Water, 



4 mm.; (5) the same plus Acetic Acid to 28 mm.; (6) 4 mm. of Uranous 



Chloride in Water plus 2 mm. HNO,; (7) 4 mm. Uranous Chloride in 



Water plus 19 mm. H 2 S0 4 . 



