Pratt and Gibbs : Two Phthaloximes.] 



[Phil. Joubn. Sci., VIII, A, No. 3. 



Fig. 1. Potassium salt of white phthaloxime in 90 per cent alcohol. 1/100 molar solution. 

 Thickness of layer, 1, 2, 4, 6, S, 10, 12, 14, 16, IS, 20, 22, 30, 50, 75, and 100 

 millimeters. 



Fig. 2. Silver salt of white phthaloxime in pyridine. 1/100 molar solution. Thiokness of 

 layer, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, 18, 20, and 22 millimeters. 



PLATE II. 



