206 PROCEEDINGS OF THE AMERICAN ACADEMY. 



EL) 1 .22. A combustion of the crude oil pave, 84.06 per cent of carbon 

 and 11.96 percent of hydrogen. Two determinations of bromine absorp- 

 tion pave, fl.) 18.8, (II.) 18.3 percent. 



A distillation of 1346 grms. of the crude oil under atmospheric pres- 

 sure gave the following weights : — 



-100° 150 JOO 200°-25<P 



167 17" 132 130 Grms. 



The small proportions distilling below 250° made it evident that the 



chief constituents could only be separated in vacuo. The specific 



gravity of these distillates at 20° were ascertained by weighing on a 

 \V, stphal balance : — 



1CKP 100 -150 150 2 



0.7642 0.81-Vj 0.8538 



Ten litres of the Puente crude oil, after collecting below 150° at 

 atmospheric pressure, gave the following weights under 50 mm : — 



150 At. it. -120' 120°-150 D 150"-17:. 176 L8f 200 D 



590 800 827 990 160 195 dins. 



The residue above 200° was next divided into fractions of convenient 

 >i/e without noting temperatures: — 



Smaller weights collected at intermediate temperatures. 



II II' I \ Ml. I II VI. KM . ( I I It . 



No attempts were made t'> ascertain the composition of the individual 

 fractions below 96 from Puente oil. Those portions will receive 

 further attention with the corresponding distillates from the other oils. 

 Without purification tin- distillate 96 - g ve a- it- specific gravity 

 at 20 . 0.7499. After repeated agitation with finning sulphnric acid 

 and potassic hydrate, the specific gravity was scarcely changed, 0.74 I": 



