2G8 PROCEEDINGS OF THE AMERICAN ACADEMY. 



0.1449 grm. of the oil gave 0.4.380 gnu. C0 2 and 0.1807 grm. ILO. 



Calculated for ''„Hj,- Found. 



C 85.7" 86.37 



II 14. .in 13.57 



From the results of this analysis it is evident that nonaue forms no 

 appreciable proportion of Puente oil. 



Dekanaphtene, Cj„ir M . 



50 grms. of a distillate collected at 160°— 162°, with smaller quantities 

 on either Bide. A determination of its specific gravity at 20° gave 

 0.7966, and after agitation with sulphuric acid, 0.7745. The composi- 

 tion of this distillate after treatment with the acid was shown by 

 analysis: — 



ii. 1 7 17 grm. of the oil gave 0.5515 grm. CO. and 0.2185 grm. IL.O. 



Calculated for C^Ug,. Found. 



C 85.7' » 8G.09 



II 14.30 13.90 



Fraction 1G8°-172°. 



In all the California oils examined, as stated above, considerable 

 quantities have collected at 1G8°-172°. Since large proportions of 

 the benzol hydrocarbons appear in all these oils, the distillate 1G8°- 

 172° might consist to a large extent of pseudoeumol, boiling point 1G8°. 

 The high specific gravity of the fraction before treatment with the acid, 

 0.8063, and the lower value after treatment, 0.7874, indicates a con- 

 siderable proportion of the benzol homologue. Even after the acid 

 treatment, the percentages of carbon and hydrogen showed the presence 

 still of the same constituent: carbon, s5.:>I ; Indrogen, 13.G1. It 

 Beems probable, therefore, that the benzol homologue constitutes the 

 greater pari of this distillate, and the residue after treatment is doubtless 

 higher or lower constituents. Hut the absence of a decane corresponding 

 to the decane in Pennsylvania petroleum, boiling at 172°, is assured. 



Fraction 180°-182°. 



Only 10 grms. collected al 180 -182°. with Bmaller quantities on either 

 Although this quantity of the nil was insufficient for complete 



examination, its specific gravity before and after analysis was ascertained, 



and an analysis made after treatment with acid. Before treatment the 



