270 PROCEEDINGS OF THE AMERICAN ACADEMY. 



96^-100' 116^-120° 136M40= 148=-150^ 153='-1623 168^-172^ 190°-194° 



34 25 35 40 60 20 40 Grms. 



The lower portions of this oil began to come over at 45°, but only- 

 small quantities collected below 65°, At 65°-70°, 40 grras. collected, 

 which will be examined in connection with the similar distillates from 

 the other oils to ascertain whether the principal constituent is hexane 

 or hexamethylene. The high specific gravity of this oil, even after 

 treating thoroughly with fuming sulphuric acid, 0.7017, would seem to 

 exclude hexane ; specific gravity, 0.6671. 



Heptamethylene, C7lTi4. 



The unpurified fraction 96°-100° gave as its specific gravity at 20°, 

 0.7395, and after treatment with fuming acid, 0.7384. The slight change 

 in specific gravity indicates that this fraction consists for the most part 

 of one hydrocarbon, and analysis with the boiling jioint shows that the 

 hydrocarbon is heptamethylene ; specific gravity, 0.7420 : — 



0.1473 grm. of the oil gave 0.4620 grm. CO2 and 0.1879 grm. H,0. 



Calculated for C^Un- Found. 



C 85.70 85.54 



H 14.30 14.18 



OCTONAPHTENE, CsHie- 



The specific gravity of the fraction 116°-120° was 0.7625, and after 

 treatment with fuming sulphuric acid, 0.7566, which indicated that this 

 product contained very little of the benzol homologues. An analysis 

 after purification gave proportions of carbon and hydrogen required for 

 octonaphtene : — 



0.1780 grm. of the oil gave 0.5572 grm. CO2 and 0.2287 grm. HoO. 



Calculated for CjHig. Found. 



C 85.70 85.39 



H 14.30 14.28 



Fraction 150°-152°. 



The distillates above 120° received no further attention, except to 

 ascertain that the xylols were present in large proportion, as in the other 

 oils. To ascertain whether nonane is contained in this oil, the specific 

 gravity of the fraction 150°-152° was ascertained and found to be 



