DESCRIPTION OF THE PLATES. 153 



Plate 62. A. Uranyl Nitrate in Water. Depth of cell constant, 3 mm. Concentrations, 

 0.19, 0.25, 0.37, 0.5, 0.75, 1.12, and 1.5 normal. 

 B. Uranyl Nitrate in Water. Concentration constant, 0.022 normal. Depth 

 of cell, 3, 4, 6, 9, 12, 18, and 24 mm. Since Beer's law holds this is 

 equivalent to keeping the depth of cell constant and changing the 

 concentration. 

 Plate 63. A. Uranyl Nitrate in Water. Concentrations, 0.187, 0.25, 0.375, 0.5, 0.75, 

 1.125, and 1.5 normal. Depth of cell for red, 15 mm.; for the ultra- 

 violet, 3 mm. 

 B. Uranous Chloride in Water. Depth of cell, 2 mm. Temperatures, 8, 17, 

 33, 48, 62, 73, and 80 C. 

 Plate 64. A. Uranyl Nitrate in Water. Beer's Law. Depth of cell, 24, 18, 13, 9, 6, 4, 

 3 mm. Concentrations, 0.187, 0.25, 0.375, 0.5, 0.75, 1.125, and 1.5 

 normal. 

 B. Uranyl Nitrate in Water. Depth of cell, 24, 18, 13, 9, 6, 4, and 3 mm. Con- 

 centrations, 0.0234, 0.0312, 0.047, 0.0625, 0.094, 0.14, and 0.1875 

 normal. 

 Plate 65. A. Strip 1. Uranyl Nitrate in Water. 1.1 normal. Depth of layer, 3 mm. 

 Strip 2. Is identical with strip 1. 



Strip 3. Water is added so as to make the depth of cell 380 mm. 

 Strip 4. Uranyl Sulphate. 0.75 normal. Depth of layer, 4 mm. 

 Strip 5. Water is added so as to make the depth of cell 380 mm. 

 Strip 6. Uranyl Acetate. 0.188 normal solution. 

 Strip 7. Water is added so as to make the depth of cell 380 mm. 

 B. Strip 1. Uranyl Sulphate in Water. 1.0 normal. Depth of layer, 3 mm. 

 Strip 2. Uranyl Acetate in Water. 0.25 normal. Depth of layer, 12 mm. 

 Strip 3. Uranyl Nitrate in Water. 0.75 normal. Depth of layer, 4 mm. 

 Strip 4. Uranyl Sulphate in Water. 0.75 normal. Depth of layer, 4 mm. 

 Plate 66. Uranyl Mtrate in Methyl Alcohol and Water. Concentration of Uranyl 

 Nitrate constant at 0.1 normal. Percentages of Water, 50, 40, 32, 24, 

 16, 8, and 0. 



A. Depth of cell, 15 mm. 



B. Depth of cell, 6 mm. 



Plate 67. A. Uranyl Nitrate in Methyl Alcohol, Beer's Law. Depth of cell, 6, 7.5, 9.5, 

 12, 15, 19, and 24 mm. Concentrations, 0.2, 0.16, 0.127, 0.10, 0.08, 

 0.063, and 0.033 normal. 



B. Uranyl Nitrate in Methyl Alcohol. Depth of cell constant, 3 mm. Con- 

 centrations, 0.05, 0.063, 0.079, 0.10, 0.124, 0.158, and 0.2 normal. 

 Plate 68. A. Uranyl Nitrate in Ethyl Alcohol. Beer's Law. Depth of cell, 6, 7.5, 9.5, 

 12, 15, 19, and 24 mm. Concentrations, 0.2, 0.16, 0.127, 0.10, 0.0S, 

 0.063, and 0.033 normal. 



B. Depth of cell constant, 15 mm. Concentrations, 0.033, 0.063, 0.0S, 0.10, 

 0.127, 0.16, and 0.2 normal. 

 Plate 69. Strip 1. Uranyl Nitrate in Glycerol. 



Strip 2. Uranyl Nitrate in three parts of Glycerol to one of Water. 



Strip 3. Uranyl Nitrate in two parts of Glycerol to two of Water. 



Strip 4. Uranyl Nitrate in one part of Glycerol to three of Water. 



Strip 5. Uranyl Nitrate in one part of Glycerol to three of Acetone. 



Strip 6. Uranyl Nitrate in one part of Glycerol to three of Alcohol. 



A. Depth of cell, 25 mm. 



B. Depth of cell, 6 mm. 



Plate 70. -4. This Spectrogram gives the Absorption Spectra of a solution of Uranous 

 Chloride in Hydrochloric Acid to which Acetone was added to increase 

 the cell depth. Depth of cell, 5, 6, 8, 10, 15, and 30 mm. 

 B. Uranyl Nitrate in Nitric Acid. 0.12 normal. Depth of cell, 1.2, 2, 3, 4, 6, 

 11, and 24 mm. 



