ON QUINGNE. — WALLACE. 305 



iiig point of 171°C. Analysis of the substance gave the 

 following results : 



I. 0.1326 gram of substance gave 0.3219 gram of CO2 and 

 0.0548 gramofH^O. 



II. 0.1336 gram of substance gave 0.3224 gram of 

 CO, and 0.0597 gram H^O. 



Calculated for Found. 



CioH^oO^. I II Mean 



C 66.02% 66.21% 65.82% 66.01% 

 H 4.63% 4.59% 4.96% 4.77% 



The sam2:)le was pure quinhydrone. 



The remaining residue left from evaporation of the 

 remainder of the ethereal solution contained more quin- 

 hydrone and a brown tarry decomposition product, but no 

 evidence of any free halide as w^as the case with the methyl- 

 iodide residue. 



The brown powder, obtained from the residue washed in 

 ether, was then further extracted with ether free of alcohol 

 until nothing remained in it that was soluble in ether. It was 

 next boiled in 100 c.c. of water, filtered and washed with 

 water. When dry, it was dissolved in alcohol, filtered and the 

 alcohol evaporated off. A shining black enamel-like residue 

 remained, which decomposed at a very high temperature. 

 When dried in a hot-air closet for two hours at 125°C., 

 analyses gave the following results : 



I. 0.1620 gram of substance gave 0.3876 gram CO, and 

 0.0682 gram of H,0. 



II. 0.1560 gram of substance gave 0.3702 gram CO., 

 and 0.0678 gram of H,0. 



A slight residue remained after each combustion, but 

 nothing of appreciable weight. 



Calculated for 

 emperical formula Ko\itid. 



CeH,0, I II 



C 66.02^ 65.25^ 65.88^ 



H 4.63^ 4.67;^ 'i:.89^ 



