338 PROCEEDINGS OF THE AMERICAN ACADEMY. 



Tlie index of refraction, 1.471, corresponded to the same molecular 

 weight. 



Calculated for C,4ll27Cl. Found. 



69.39 69.35 



Another fraction of the chlorine product collected in considerable 

 quantity at 197°-200°, 15 mm., which, after purification, distilled close 

 at 200°, and gave as its specific gravity at 20°, 1.0066. It gave a per- 

 centage of chlorine indicating a dichloride. 



0.1669 gram of the substance gave 0.1680 gram AgCl. 



Calculated for CjiII^gC^. Found. 



CI 26.80 24.90 



The low percentage of chlorine is doubtless due to incomplete chlorin- 

 ation. The index of refraction found, 1.489, corresponds to the molecular 

 refraction of the dichloride. 



Calculated for Ci,II.,,;Cl2. Found. 



74.33 76.12 



Hydrocarbon CigHgo, B. P. 159°-160° (60 mm.). 



Since a considerable portion of the distillates collected constant at 

 159°-160°, 50 mm., after the twentieth distillation, this fi-action was 

 selected for the identification of the next hydrocarbon, which proved to 

 be CisHgn- It gave as its specific gravity at 20°, before purification, 

 0.8311, and after thorough agitation with concentrated and fuming sul- 

 phuric acid, 0.8192. Determinations of carbon and hydrogen indicate 

 the series C^Han- 



0.1586 gram of the oil gave 0.4961 gram CO. and 0.2007 gram HoO. 



Calculated for C^jIIso. Found. 



C 85.70 85.30 



H 14.30 14.16 



This formula was indicated by the molecular weight determined at the 

 freezing point of benzol. 



0.3624 gram of the oil and 19.276 grams benzol gave a depression of 

 0°.443. 



Calculated for 0,,r,IIjo. " Found. 



210 208 



