196 EXAMINATION OF A NAPHTHA FROM LIME-SOAP. 
but had none of the odor of acetone with which the offensive odor had hitherto been 
accompanied. It was treated with six successive portions of diluted sulphuric acid. 
The first portions of acid became very black, but the fifth and sixth portions were only 
slightly colored. After two or three additions of acid, the hydro-carbon itself became 
rather dark-colored ; but on treating it with a solution of caustic alkali the color 
changed to a light-yellow. After having been dried over hydrate of potash, the hydro- 
carbon was repeatedly distilled through Warreu’s hot condenser, being boiled the while 
over sodium, upon which it continued to act to a considerable extent for a long while. 
At the close of these operations the fractions 148°-149° and 149°-150° retained 
their former prominence, either of them being more than three times as large as the 
adjacent degree-fractions ; 148°-149° was rather larger than 149°-150°, standing to it 
in the ratio of 5 : 4.2. 
Distilled in an ordinary retort over sodium, the fraction 149°-150°, boiled at 153° 
(corrected). 
On combustion, 0.1499 grm. of the purified hydro-carbon gave 0.1965 grm. water, 
and 0.4705 grm. carbonic acid. Or, 
Found. 
Theory. 
Carbon 85.59 Cig 85.71 
Hydrogen 14.54 Hig 14.29 
100.13 100.00 
Determinations of the density of its vapor gave the following results: — 
I. II. 
Temperature of the balance, ow : ae - . = «» 229 24.5° 
bis oil-bath, . : ‘i . . . : . 1870 186° 
Excess of weight of balloon, ‘ : ‘ 3 : i » «4 0.5493 0.4878 
Capacity of eg wy 8 : a> it as ue - 239 ce. 210 cc. 
Air remainingin “ 5 ; a oo : ar @ ‘ Qs 0 # 
Height of barometer, , ‘ . ‘ ‘ a a : ‘ . 766.6mm. at 220 765mm. at 24° 
Density of vapor found, hk oe ‘ ae: eee ee 45ST 4.561 
He oe theoretical (Cig His), i ie. Se. et 4.357 
Its sp. gr. was found to be 0.7618 at 0°. 
Isocumole = Cy, Hy ) At 165°-173° was a very large heap amounting to 1200- 
and 1500 ¢.¢.; being by far the largest heap obtained from the 
Rutylene = Co) Hy) J) lime-soap-naphtha. Though perfectly well defined as regards 
the bodies next above (195°) and below (155°) it, this heap, nevertheless, exhibited no 
clearly-marked summit, each of the degree-fractions within the above-mentioned limits 
