210 EXAMINATION OF NAPHTHA FROM RANGOON PETROLEUM. 
that below 175° the quantities of liqiud had become so small that no definite results 
could there be obtained. It is true that several elevations existed in this range of 
small fractions, but to these we will refer hereafter. 
It should here be mentioned that we had not been long at work upon this naphtha 
from Rangoon petroleum, before the conviction was forced upon us that we had started 
with an insufficient quantity of material. Application was therefore made in the 
winter of 1863-4 to Price’s Patent Candle Company for a supply of the naphtha such 
as was formerly prepared by them by distilling Rangoon petroleum upon the large 
scale, but to our regret we learned that the naphtha in question was no longer manu- 
factured by the company, and that it was out of their power to furnish us with any of 
it. In spite of this, and in fact. while the negotiation was pending, we continued to 
work upon our naphtha as before, being animated by a determination: to learn how 
much could be done with the process of fractional condensation when this is applied to 
so small a quantity of volatile material as that at our disposal. 
Each of the isolated heaps of liquid was now worked by itself, over sodium, until 
this metal was no longer acted upon, after which the most prominent fractions were 
analyzed and otherwise examined, as is stated below. It should be noted that neither 
the crude petroleum, nor the naphtha, nor the finished heaps were ever subjected to 
the action of any chemicals other than this distillation from sodium which has just 
been alluded to. 
Rutylene = Czy Hy. The heap at 170°-176° amounted to about 120 ¢.¢. Its sum- 
mit was very clearly defined at 172°-173°, this fraction being twice as large as those 
at 171°-172° or 174°-176°, and half as large again as that at 173°-174°. 
The fraction 172°-173° boiled at 175.8° (corrected). 
. On analysis, 0.2036 grm. of it gave 0.255 grm. water, and 0.6421 grm. oe carbonic 
acid. Or, 
Found. Theory. 
Carbon, 86.00 C29 85.7 
Hydrogen, 13.75 Ho 14.3 
99.75 100.00 
Determination of vapor density : — 
Temperature of balance, . i Fi : ‘ , : 4 % 3 ‘ , « 125° 
“ Gcba 4. ~@ & So = = *» «& ge & & & Soe 
Excess of weight of balloon, . 2 , F . ; c 8 ‘ . . - 0.5745 
Capacity “ a . 4 -  @M2ee 
Air remaining in ae 5 ; c ‘ ; é ‘ ‘ : . QO: 
Density of vapor found, o - o : ‘ ‘a . . . ; : : 2 5.086 
“ & theoretical (Cao Hao), se ee BAT 
