188 EXAMINATION OF A NAPHTHA FROM LIME-SOAP. 
(corrected) ; hence, when the quantity of liquid in the fraction 94°-95° is considered 
the corrected boiling point of the hydro-carbon may be estimated at something less 
than 95°. 
On combustion, 0.1297 grm. of the purified hydro-carbon gave 0.1688 grm. water, 
and 0.4081 grm. carbonic acid. Or, 
Found. Theory. 
Carbon 85.81 Cig 85.71 
Hydrogen 14.42 Hig 14.29 
100.23 100.00 
A determination of the vapor density of the purified fraction 93°-94°, gave the fol- 
lowing result : — 
Temperature of balance, . Ste 
i “ oil-bath, = 136° 
Excess of weight of balloon, - == 0.3845 grm. 
Capacity of & == 219 ¢. ¢: 
Air remaining in # 
Height of barometer, 
= of 
= 757.2mm. at 18° 
Density of vapor found, . 8 ££ © 8 8 © © 8 8 © « wm Seddsg 
oe theoretical (C14 His) . . F ‘i ‘ $ ‘ é P = 3.389 
Hydride of Ginanthyl. = Cy Hy, At 97°-98°, as a summit, was a very well-marked 
heap, the adjacent fractions, 96°-97° and 98°-99°, being also large, while those next in 
order fell off gradually upon either hand,— more rapidly, however, above 99° than 
below 96°. Roughly estimated, the heap from 96° to 100° amounted to about 450 «. c. 
The fraction 97°-98° having been analyzed before it had been subjected to any 
chemical treatment, afforded the following result :— 
0.2252 grm. of the hydro-carbon gave 0.2913 grm. water, and 0.6964 grm. carbonic 
acid. Or, 
Found. 
Carbon 84 82 
Hydrogen 15,19 
99.51 
These figures agree with the improbable formula C,, H,;». 
The fraction 97°-98° was now at once treated with monohydrated sulphuric acid. 
The first portion of the acid blackened considerably, though the hydro-carbon itself 
was at first only slightly colored; this blackening was, however, not nearly so decided 
as was the case with benzole. A portion of viscid matter also separated out and 
adhered to the sides of the bottle; but only a slight amount of heat was evolved. The 
