





* 



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 Warren'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. 



Carbon * 85.59 

 Hydrogen 14.54 



Theory. 



Cis 85.71 

 His 14.29 





* 







100.13 



100.00 



Determinations of the density of its vapor gave the following results : 



Temperature of the balance, 



" oil-bath, 



Excess of weight of balloon, 

 Capacity of " 



Air remaining in " 



Height of barometer, 



Density of vapor found, 



i. II. 



22° 24.5 



■ 



o 





187o 186 



O 



• - u 



theoretical (Cis His), 



0.5493 0.4873 



239 c.c. 210 c.c. 



" " 



766.6m m - at 22° 765 mm - at 24° 

 4.557 4.561 



4.357 





Its sp. gr. was found to be 0.7618 at 0°. 









lsocumok=C ls Ha ^ At 165°-173° was a very large heap amounting to 1200- 



and 1 1500 c. c. ; being by far the largest heap obtained from the 



Mutylene = C W H^ J lime-soap-naphtha. Though perfectly well denned 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 



• 



■ 



