190 EXAMINATION OF A NAPHTHA FROM LIME-SOAP. 
and 0.4144 grm. carbonic acid (I.). Another portion of 0.1168 grm. gave 0.1654 grm. 
water, and 0.3601 grm. carbonic acid (II.) — or, 
Found. Theory. 
I IL 
Carbon 84.27 84.08 Cie 84 
Hydrogen 15.74 15.75 Hig 16 
100.01 99.83 100 
A determination of the density of its vapor resulted as follows : — 
Temperature of balance, " a Oe Fe ‘ 3 : : : 2 . , A ‘ 2 18° 
Temperature of oil bath, re ee 150° 
Weight of balloon, ; . ; ‘ ‘ . ¥ . 4 ow oe B 7 2 - 0.3795 grm. 
Capacity of balloon, ee oR : ‘ a wa Ue a : - 221lec. 
Air remaining in balloon, . a a ‘ z . F ‘ ; : ‘ é . . « Bene; 
Height of barometer, ; . 5 ‘I : ¥ . j ‘ a a 2 . 757.2mm. at 18° 
Density of vapor found, : é ae 9 es . a : = . ee 3.5616 
“ «“ theoretical (C14 Hie), 3.458 
The sp. gr. of the liquid was 0.7085 at 0°, and 0.6942 at 17:5°. 
Tolwole—= Cy H;. Next above the hydride of cenanthyl (98°), was a singularly 
well-defined heap at 110°-111°. This body was more readily isolated — that is to 
say, brought into such a state of equilibrium that its boiling point was almost absolutely 
constant — than any of the other hydro-carbons which we have obtained from the lime- 
soap-naphtha. Altogether, from 109°-112°, this heap amounted to about 440 ¢.¢. Its 
odor was that of toluole. 
The fraction 110°-111° was treated at once with monohydrated sulphuric acid. 
The first portion of acid made the whole liquid dark-colored and became itself very vis- 
cid, some heat being evolved. The second and third portions of acid also became dark- 
colored, as did the fourth, though to a somewhat less extent. The fifth, sixth, and 
seventh portions of acid were each allowed to act during twenty-four hours, but they 
appeared to affect the hydro-carbon very little. The hydro-carbon was now very dark- 
colored, but on the addition of a dilute alkaline solution it cleared up to a light-yellow 
color. It was dried over chloride of calcium and distilled in an ordinary retort without 
sodium. After about two-thirds of the liquid had come over colorless, the residue sud- 
denly became black, its temperature rose rapidly, and much sulphurous acid was evolved. 
The distillate being twice redistilled over sodium, the greater portion of it came over at 
111° (corrected) in each instance. The product was, however, evidently still impure, 
for in each case a small residue of higher boiling point was obtained. The boiling point 
above given is doubtless too high; but we have deferred any reconsideration of this re- 
