_ 1 I EXAMINATION OF NAPHTHA FROM RANGOON PETROLEUM 



the quantities of liquid in the degree-fractions fell away to almost nothing; there is 

 evidently no compound present between 234° and 250°. 



The fraction 230°-231° boiled at 232.75° (corrected). 



On analysis, 0.2871 gnu. of the fraction 230°-231° gave 0.3541 grm. water, and 0.91 



gvm. carbonic acid. Or, 



Kournl. 



Carbon, 80.38 

 Hydrogen, 1 3.6a 



Theory. 

 C2G 85.7 



H26 14.3 





100.07 



100.0 



In determining the vapor-density of this substance the balloon was filled with an 



atmosphere of carbonic acid 1 after the introduction of the liquid. The following result 

 was obtained : — 



Temperature of balance, 22° 



- 



" oil-bath, 



274° 



Excess of weight of balloon, ........... 0.G863 



Capacity " 



Air remaining in u ...... 



I bight of barometer, 





233 c. c. 

 



♦ • 



7G0.5 m. m. at 21° 



Density of vapor found, q 



4225 



u 11 



theoretical (C26 H26), 



G.2940 



The specific gravity of the fraction 230°-231° was found to be 0.8445 at 0°. 

 The attempts which we have made to isolate the constituents of that portion of Kan 

 goon naphtha which is more volatile than the hydro-carbons above described, were un 



ful 



the quantity of naphtha boiling at temperatures lower than 175° h 



been so small that it could not be thoroughly analyzed by the process of fractional conden- 

 sation. After protracted efforts to separate these volatile hydro-carbons from one 

 another by means of a diminutive apparatus, we were at last reluctantly forced to aban- 

 don the attempt, and to acknowledge our inability to obtain satisfactory results from 

 such small quantities of the complex material. 



Indeed, the quantity of volatile naphtha at our disposal was so small that although at 

 the last it was divided only into fractions of wide range, each of them representing three 

 or more degrees of temperature, these portions in several instances soon became too 

 minute to be operated upon at all, even in the smallest practicable apparatus. But 

 since these volatile products had been subjected, first and last, to a large number of dis- 

 tillations and fractional condensations, each of the fractions finally obtained must have 



1 In a previous attempt to determine this vapor-density in the usual way, without employing carbonic acid, the mixture of air 

 and vapor .„ the balloon took fire with a slight explosion, the temperature of the oil-bath being then at 321°. 





