190 PROCEEDINGS OF THE AMERICAN ACADEMY. 



distils under atmospheric pressure without decompositiou ; even under 

 diminished pressure, the amounts distilling below 250° are small. 



In attempting to separate the constituents of this oil from the distil- 

 lates first collected in vacuo, the portions below 250°, about the same in 

 amount as the corresponding distillates from the South American oil, 

 were carried through ten distillations under atmospheric pressure, which 

 brought together larger quantities at 169°-170°, 190°-191°, and 212°- 

 214°. The portions collected at 85°-150° in the first distillation gave as 

 its specific gravity at 20°, 0.8755 ; the distillate 150°-225°, 0.9038 ; and 

 the distillate 225°-250°, 0.9271. After the tenth distillation, the fraction 

 170°-17r gave as its specific gravity, 0.S200; the fraction 189°-190°, 

 0.8330; and the fraction 212°-214°, 0.853. A combustion of the frac- 

 tion 189° -190° gave the following percentages of carbon and hydrogen : — 



0.1510 gram of the oil gave 0.4757 gram COg, and 0.1835 gram H2O. 



C 85.90 



H 13.51 



After purification with nitric and sulphuric acids, the composition of 

 this oil was not essentially changed : — 



0.1484 gram of the oil gave 0.4643 gram CO2, and 0.1839 gram H2O. 



Calculated for C)iH2n. Found. 



C 85.71 85.33 



H 14.29 13.77 



The fraction 212°-214°, without purification, gave the following 

 results : — 



0.1457 gram of the oil gave 0.4625 gram COo, and 0.1757 gram FLO. 



C 86.46 



H 13.40 



By treatment with a mixture of nitric and sulphuric acids, and then 

 with fuming sulphuric acid, this distillate was only slightly affected : — 



0.1343 gram of the oil gave 0.4231 gram COo, and 0.1677 gram H2O. 



Calculated for CnHai. Found. 



C 85.71 85.90 



H 14.29 13.88 



Unfortunately the quantities of these distillates were too limited to 

 permit of further examination. The principal object, however, — to ascer- 



