442 PROCEEDINGS OF THE AMERICAN ACADEMY. 



form of a varnish, this result being obtained, for instance, when the 

 alcoholic solution is evaporated to dryness on the water bath. It 

 melts at 142°, and is readily soluble in alcohol or chloroform ; soluble 

 in carbonic disulphide, glacial acetic acid, or benzol ; difficultly soluble 

 in ether ; insoluble in water. The best solvent for it is alcohol. With 

 aniline it gives two or more products, the study of which next year 

 we hope may throw some light on its constitution. 



Reduction of the Oxide of Dichlordiethoxyhydroquinone Dihenzoate. 



When the substance described in the preceding paragraph is moist- 

 ened with a concentrated solution of hydriodic acid, and heated on the 

 water bath until dry, a reaction takes place, as shown by the separation 

 of free iodine. In order to complete the action the moistening with 

 hydriodic acid and warming was repeated, and the product thus 

 obtained was purified by repeated recrystallization from a veiy small 

 quantity of alcohol until it showed the constant melting point 164°, 

 when it was dried at 100°, and analyzed with the following results: — 



I. 0.2004 gram of the substance gave on combustion 0.4339 gram of 



carbonic dioxide and 0.0812 gram of water. 

 II. 0.2301 gram of substance gave 0.5001 gram of carbonic dioxide 

 and 0.0825 gram of water. 

 III. 0.2274 gram of substance gave by the method of Carius 0.1462 

 gram of argentic chloride. 

 IV. 0.1998 gram gave 0.1276 gram of argentic chloride. 

 V. 0.1990 gram gave 0.1276 gram of argentic chloride. 



Calculated for Found. 



CeCljOCoHjOHlOCOCeHsJj. 1. II. III. IV. V. 



Carbon 59.06 59.06 59.28 



Hydrogen 3.58 4.50 3.99 



Chlorine 15.89 15.90 15.79 15.85 



These results ajjree best with those calculated for the formula given 

 above, although it is not impossible that the substance may contain 

 more hydrogen. It is obvious, however, that the formula of the sub- 

 stance cannot be considered as established, until the analytical data 

 have been supported by experiments with some of its derivatives. AYe 

 shall not at present indulge in any speculations on the constitution of 

 this substance. It crystallizes usually in balls of indistinct little 

 prisms, but occasionally slender short prisms terminated by a single 

 plane at a very sharp angle were observed. Like its mother sub- 

 stance, it has a strong tendency to come down from its solutions in the 



