MABERY. — CONSTITUENTS OP PETROLEUM. 153 



alcohol, in which it is very sparingly soluble, and gave as its melting 

 point 158°-1G0'', which was not clianged by several crystallizations. 

 There are several aromatic hydrocarbons whose boiling points are in this 

 vicinity, but only one forms a nitro derivative with this melting point, 

 isodurol, whose triuitro derivative melts at 156°. It would be inter- 

 esting to examine these nitro products more fully, but for want of time 

 and material nothing further was done with them. 



The specific gravity of the oil was very sensibly diminished by the 

 action of the acid mixture. The first determination gave 0.7688, which 

 was not diminished by further treatment, although this value is somewhat 

 higher than the specific gravity of the Pennsylvania distillate, 0.7581. In 

 determining the boiling point of this product, 50 c.c. distilled entirely at 

 195°-196°, mostly at 196°, under a tension o£ 760 mm. After purifi- 

 cation of a portion of the crude distillate with fuming sulphuric acid, 

 different preparations of the washed and dried oil gave in the hands of 

 different analysts the following percentages of carbon and hydrogen : — 



I. 0.1508 gram of the oil gave 0.4683 gram COj, and 0.2055 gram 



HoO. 

 II. 0.1520 gram of the oil gave 0.4715 gram CO^, and 0.2109 gram 

 HoO. 

 III. 0.1523 gram of the oil gave 0.4733 gram CO2, and 0.2180 gram 

 H2O. 



The specific gravity of the purified oil was found to be 0.7737 at 20°, 

 and the vapor density as follows : — 



0.1421 gram of the oil gave 68.6 c.c. of vapor at 182° under 373.8 mm. 



Calculated for C11H22. Found. 



5.33 5.43 



A determination of its molecular weight by Mr. Hudson gave 158; 

 required for the formula CiiH24, 156. 



In attempting to form the chlorine derivatives of this hydrocarbon, 16 

 grams of the fraction 196°, Ohio petroleum, the small amount that 

 remained for this experiment, was treated with chlorine until it gained in 

 weight 4.5 grams. After the chlorine product was fractioned four times 



