270 PROCEEDINGS OF THE AMERICAN ACADEMY. 



Octonai'iitlm:, C 8 H 16 . 



The specific gravity of the crude distillate 118°-120° was 0.7598, 

 and after purification with faming Bulphuric acid and sodic hydrate, 

 0. 7.330. A combustion of the anpurified oil gave 86.21 per cent of 

 carbon and 13. 3d per cent of hydrogen. 



A combustion after purification indicated octonaphtene, although the 

 percentage of hydrogen is somewhat too high, probably on account of 

 accidental moisture : — 



0.1470 grm. of the oil gave 0.4598 grin. C0 2 and 0.197G grm. 11,0. 



Calculated for C„H ie . Found. 



C 85.70 8o.34 



II 11.30 11.93 



The distillates 135°-140° consisted largely of the xylols. 



D i; K A N A 1 • 1 1 1 1 ■: N E, C juHa,. 



The specific gravity of the crude fraction 158°-1G0° was 0.7742, and 

 after purification with the fuming acid and sodic hydrate, 0.7742. Car- 

 bon and hydrogen were determined in the purified oil : — 



0.1455 grm. of the oil gave 0.4583 grm. C0 2 and 0.1804 grm. 11,0. 



Calculated for C 10 ll 20 . Found. 



C 85.70 85.91 



H 14.30 13.78 



The specific gravity of the crude distillate 1G8°-170° was 0.7928, 

 and 0.7*40 after treatment with Coming acid and sodic hydrate. A 

 combustion of the purified oil gave 85.98 per cent of carbou and 13. G9 

 per cenl of hydrogen. 



The fraction 17s -1*2 had the specific gravity before treatment, 

 106, and afterward, 0.7924. A combustion of the oil after treatment 

 gave s "'.'.i7 per cent of carbon and 13.51 per cent of hydrogen. The 

 fraction 198 200 had the specific gravity of 0.8183, and after treat- 

 ment, 0.8069. The following percentages of carbon were given by com- 

 bustion: carbon, 86.51 ; hydrogen, 13.54. 



Tin' low proportions of hydrogen and high proportions of carbon 

 alluded to before are especially apparent in the Torrey oil. Whether 

 this be due to a higher Beries or to benzol homologues not easily 



