MABERY. — OX THE COMPOSITION OF PETROLEUM. 335 



verification of the former work, which assigned the formula C10II24 to 

 this hydrocarbon. 



A determination of molecular established the formula C]2Ho4. 



0.4528 gram of the oil and 23.375 grams benzol gave a depression of 

 0.555. 



Calculated for CioH^i Founa. 



168 171 



The chlorine product was formed also, by the action of chlorine on 

 the hydrocarbon standing over water. On fractioning the product it 

 collected for the most part at 160°, 15 mm., and this distillate gave as its 

 specific gravity at 20°, 0.9145. 



The percentage of chlorine corresponded to the formula CioHojCl. 

 0.1910 gram of the oil gave 0.1338 gram AgCl. 



Calculated for Ci^U,!. Found. 



17.52 17.32 



The molecular weight of the chlorine product at the freezing point 

 gave the required value for the same formula. 



0.361 gram of the oil and 20.79 grams benzol gave a depression of 0°.425. 



Calculated for C12H23CI. Found. 



202.5 200 



Distillation of the higher fractions was repeated several times, to collect 

 so far as possible the hydrocarbons within narrow limits. 



Hydrocarbon CigHoe, B. P. 228°-230°. 



The next fraction examined was the one which collected at 228°-230° 

 after the 20th distillation. Without puriHcation it gave as its specific 

 gravity at 20°, 0.8087. After thorough agitation with concentrated and 

 fuming sulphuric acid its specific gravity was reduced to 0.7979, which 

 agrees closely with the specific gravity of the hydrocarbon CisHoe sepa- 

 rated from Ohio petroleum. 



A combustion gave values for carbon and hydrogen required for the 

 series CnHon- 



0.1614 gram of the oil gave 0.5068 gram CO. and 0.2060 gram HoO. 



Calculated for CijHo,-,. Found. 



C 85.70 85.64 



H 14.30 14.28 



