300 PROCEEDINGS OF THE AMERICAN ACADEMY. 



It gave as its specific gravity at 20°, 0.7787. 



The refractive index of tliis oil was found to be 1.4348, and the 

 molecular refraction, 42.27 ; calculated for CgHig, 41.42. This con- 

 stituent was therefore trimethyihexamethylene. 



A distillate collected in considerable quantity at 160°-162°, which 

 was purified with fuming sulphuric acid and analyzed : — 



0.2055 grm. of the oil gave 0.6445 grm. CO.2 and 0.2556 grm. HoO. 



Calculated for CiqHjq- Found. 



C 85.70 85.50 



H 14.30 ■ 13.82 



This oil gave as its specific gravity at 20°, 0.7902. Its index of 

 refraction was 1.4418, and its molecular refraction, 46.94; calculated 

 for CioHoo, 46.03. 



The distillate at 190°-192°, after purification with fuming sulphuric 

 acid, gave as its specific gravity at 20°, 0.8061. Its composition was 

 determined by analysis ; — 



0.1612 grm. of the oil gave 0.5046 grm. COo and 0.2025 grm. HoO. 



Calculated for C,iH22- Found. 



C 85.70 85.35 



H 14.30 13.96 



The molecular weight of this hydrocarbon at the freezing point of 

 benzol was 156; calculated for CnHo.,, 154. The index of refraction 

 at 20° was 1.4482, and the molecular refraction 51.24; calculated for 

 CuHoo, 50.63. 



The distillate 212°-214°, purified with fuming sulphuric acid, gave as 

 its specific gravity at 20°, 0.8165. A combustion gave the following 

 proportions of carbon and hydrogen : — 



0.1875 grm. of the oil gave 0.5879 grm. COo and 0.2451 grm. HgO. 



Calculated for CijIIjj. Found. 



C 85.70 85.51 



H 14.30 14.52 



A determination of its molecular weight at the freezing point gave 

 172; calculated for C10H04, 168. Its index of refraction was 1.4535, and 

 the molecular refraction, 55.76 ; calculated for CjoHo^, 55.23. 



