The Torrey oil contained more of the lower distillates than any other 

 of the specimens examined. Several grams collected below 40°, and at 

 65°-70°, 30 grams came together. The un purified distillate 65°-70° 

 gave as its specific gravity at 50°, 0.6981, which was reduced only to 

 0.6926 after agitation with fuming sulphuric acid. The specific gravity 

 of hexane boiling at 68° is 0.6630. 



Analysis of the purified oil gave the following results : — 



I. 0.1551 grm. of the oil gave 0.4768 grm. C0 2 and 0.2138 grra. H 2 0. 



II. 0.1995 grm. of the oil gave 0.6146 grm. C0 2 and 0.2769 grm. H 2 G. 



III. 0.1369 grm. of the oil gave 0.4248 grm. C0 2 and 0.1888 grm. H 2 0. 



In analysis III. every precaution was taken to avoid loss of the oil 

 after weighing, and the temperature of the combustion was maintained as 

 high as the tube would stand. Probably the coincidence in the. per- 

 centages of hydrogen is due to retention of unsaturated hydrocarbons 

 in the sulphuric acid. 



Apparently, as in the Fresno oil, the hydrocarbon at 68° is a mixture 

 of hexane and hexamethylene. 



Heptamethylene, C 7 H u . 



The fraction 9 6° -98° had the specific gravity at 20°, 0.7496, which 

 was scarcely changed by treatment with fuming sulphuric acid, 0.7430. 

 Analysis I. was made of the crude distillate, and analysis II. of the 

 purified product : — 



I. 0.1222 grm. of the oil gave 0.3810 grm. C0 2 and 0.1602 grm. H 2 0. 

 II. 0.1530 grm. of the oil gave 0.4801 grm. C0 2 and 0.1974 grm. H,0. 



This product is, therefore, fairly pure heptamethylene. 

 The fractions in the vicinity of 110° were shown to be composed for 

 the most part of toluol by the formation of nitro-products. 



