164 PROCEEDINGS OP THE AMERICAN ACADEMY. 



heated gently on the steam bath for a few minutes. The product was 

 washed with water, dilute sodic hydrate, and finally with a little alcohol ; 

 after which it was crystallized from a mixture of chloroform and alcohol, 

 until it showed the constant melting point r20°-121°, when it was dried, 

 and analyzed with the following results : — 



I. 0.2059 gram of the substance gave by the method of Carius 0.1356 

 gram of argentic chloride. 

 II. 0.1740 gram of the substance gave 0.1126 gram of argentic chloride. 



Calculated for Found. 



C6Cl2(0C2H5),(0C0CH3)o(0C2H5)3. T. 11. 



Chlorine 16.09 ' 16.28 16.00 



Properties of DichlordiethoxyqiiinonediacetyhHetliijlacetal. — This sub- 

 stance crystallizes from a mixture of chloroform and alcohol in very 

 sharp rhombic plates with bevelled edges and the acute angles often 

 truncated. It resembles the methyl compound strongly in crystalline 

 form and habit except that the plates are usually thinner, and it crys- 

 tallizes even more beautifully. It melts at 120°-121°,* and is soluble 

 in benzol or chloroform ; somewhat soluble in carbonic disulphide ; slightly 

 soluble in cold methyl or ethyl alcohol, more soluble in hot ; insoluble 

 in ligroin. or in water. A mixture of chloroform and alcohol is the best 

 solvent for it. Sodic hydrate has no apparent action upon it. 



Action of Sulphuric Acid on Certain Diatomic Phenols. 



This work was undertaken in the hope that it might give some help in 

 deciding whether the atom of oxygen in the oxide of dichlormethoxy- 

 quinonedibenzoylmethylacetal is in the ortho or meta position ; for if by 

 treating ortho or meta diatomic phenols with sulphuric acid we could 

 obtain from one or the other an oxide similar to that which we are study- 

 ing, there would be a strong probability that the oxygen in our oxide was 

 attached in the same position as that in the new oxide. 



The phenols which we have used are resorcine as the meta body, 

 pyrocatechine and some of its derivatives as the ortho compounds, and 

 also chloranilic acid as a representative of the para series. 



The sulphuric acid of specific gravity 1.44 used in making the oxide 

 C6CLOCH30(OCOC,.rL)20CH3 had no apparent effect on resorcine, but 

 when it was boiled with an acid of specific gravity 1.71, a reddish brown 

 solution was formed, which deposited a brown mass on cooling ; this dis- 



* The corresponding benzoyl compound melts at 170°. 



