302 PROCEEDINGS OF TIIK AMERICAN ACADEMY. 



I >i terminations by the boiling point method of hydrocarbons with such 

 high molecular weights are of necessity somewhat uncertain on account 

 of the slight rise in boiling point. The question of the molecular weights 

 of these solid hydrocarbon* will receive more attention with the constitu- 

 ents of Pennsylvania and California petroleums with high boiling point-. 



The specific gravity of the solid 250°-260° is nearly the same as that 

 of the corresponding hydrocarbon from Penusylvania petroleum: — 



The specific gravity of the -Japanese solid at 60° could not be deter 

 mined, because it was not liquid at that temperature. 



.Mivacaw \ I'll ROLEUM. 



Although this oil is from a field situated only >ix miles from the 

 Amaze field, it «lilTers essentially in its specific gravity, and in the pro- 

 portion- in which it distils, from the Amaze oil. The crude oil was 

 distilled under atmospheric pressure, and the distillation of the lower 

 portions continued until they came together in larger quantities at tern 

 peratures at which distillates were collected from the other oils. The 

 specific gravity of the distillates after treating with concentrated sulphuric 

 acid is as follow- : — 



98 100°. 11- 120°. 184 -186°. 160 162°. 194 196°. 212°-214°. 228 i 



0.7364 0.7631 0.7772 0.8088 0.8493 0.8674 0.8770 



Tin- last three fractions were also treated with fuming sulphuric acid and 

 the specific gravitj determined: — 



194 212 -214 . 228 - 



5412 0.8650 0.8720 



The slight change after the thorough treatment with fuming sulphuric 

 arid shows that no benzol homologues were present in these portions, 

 v t the specific gravity of the hydrocarbons above 196 is considerably 

 higher than of those from Amaze oil or (rum Hirei oil. The distillates 



Unpublished data. 



