68 



The Philippine Journal of Science 



1916 



and states that the oximes of such quinones cannot be obtained 

 by direct treatment of the substituted quinone. 



Oscillation frequency. 



20 



OO 2 



2 2 



4 Z 



6 2 



8 3C 



00 3 



2 3 



4 3 



5 3 



p 46 



00 4 



2 ^ 



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3.8 

 3.6 

 3.4 

 3.2 

 3.0 

 2.8 

 Z.S 

 2> 

 2.2 

 2.0 

 1.8 



i.e 



1.4 

 1.2 



Fig. 4. Curve 1. P-hydroxyquinone in alcohol. Curve Z. Potassium salt of p-hydroxy- 

 quinone in 80 per cent alcohol. Curve S. Chloranll in glacial acetic acid. 

 Curve 4. P-dichlordiethoxyquinone in alcohol. Curve 5. Diketohexamethylene 

 in alcohol. 



DISCUSSION OF RESULTS 



Hydroxyterephthalic ester in the light of the arc shows an 

 absorption curve differing somewhat in the intensity of its selec- 

 tive absorption from that of diethylsuccinosuccinate," but head- 

 ing at about the same point — ^namely, 1/a=2,660. In the former 

 respect it more closely resembles salicylic acid,^° the band of 



"Gibbs and Brill, loc. cit. 



"Gibbs and Pratt, This Journal, Sec. A (1913), 8, 45. 



