194 EXAMINATION OF A NAPHTHA FROM LIME-SOAP. 
water, and 0.5687 grm. carbonic acid (I.). Another portion, not weighed, gave 0.2398 
grm. water, and 0.5647 grm. carbonic acid (IL). Or, 
Found. 
I. Il. 
Carbon 84.80 85.27 
Hydrogen 14.76 ° 14.73 
99.56 100.00 
From these analyses the improbable formule C,, Hy; and Cy, Hy, are derived. 
The excess of hydrogen, however, indicates the presence of a member of the hydride 
series, and to obtain this the degree-fractions about 128° were treated with mono- 
hydrated sulphuric acid. The first and second portions of acid blackened instantly 
and much viscid matter was deposited ; heat was also evolved. The third, fourth, fifth, 
and sixth portions of acid each became less black than the preceding portion; but a 
large proportion of the hydro-carbon disappeared during this treatment. The opera- 
tions of washing, drying, and boiling with sodium were conducted in the usual way. 
On combustion, after this treatment with strong acid, 0.1253 grm. of the hydro- 
carbon gave 0.1746 grm. water, and 0.3895 grm. carbonic acid. Or, 
Found. Theory. 
Carbon 84.75 Cig 84.2 
Hydrogen 15.48 Hig 15.8 
100.23 100.0 
The upper portion of this heap consequently contains hydride of capryl, the true 
boiling point of which is 128°-129°. 
Xylole = Ci, Hy. Between 140° and 144° was a large heap of 840-850 «. ¢,, 
the well-defined summit of which was at 142°-1423°. Upon either side of this point 
the size of the degree-fractions rapidly diminished, these being all very small below 
140° and above 144°. 
The fraction 142°-1424° was treated at once with monohydrated sulphuric acid, the 
first portion of which became very dark and viscid, some heat being at the same time 
evolved; the second and third portions of acid also became very dark, though less 
viscid than the first ; the fourth portion of acid became somewhat dark, and the hydro- 
carbon itself now began to be colored, and the odor of sulphurous acid was per- 
ceptible. 
After having been washed and dried in the usual way, the hydro-carbon was redis- 
tilled through Warren’s hot condenser, when it appeared that, by combination of a 
portion of the hydro-carbon with the elements of sulphuric acid, there had been formed 
