‘ 
202 EXAMINATION OF A NAPHTHA FROM LIME-SOAP, 
Temperature of oil-bath, e @ 2 Ce ge Le a a a ee 2340 
Excess of weight of balloon, a a a oe ee a eo ee _ 0.557 grm. 
Capacity of balloon, oe a ee er ee a ee ee ee ee 213 c.c. 
Air remaining in balloon, . . a ‘ ‘ ‘ : @ 3 : < 8 Occ. 
Height of barometer, . «© «© «© «© «© «© «© + © «© 4 765 mm. at 24° 
Density of vapor found, @ Se Ge ogee Oe ewe See ee 5.471. 
“ “ theoretical, » 2. 1 eee eee (Con Hee) 5.325. 
Two determinations of its sp. gr., at 0,° gave respectively 0.7902 and 0.7916. 
Laurylene—=Cy Hy After the first distillate from the crude lime-soap naphtha 
had been eight or ten times redistilled, the quantities of residue at 200° were so small 
in comparison with the large retorts employed that it was found to be impracticable to 
continue the distillation to 220°, as had been originally proposed; the larger portion of 
the matter less volatile than 200° which was contained in the first distillate, was conse- 
quently set aside as a highly impure residue at an early period. After a while, how- 
ever, when smaller retorts were employed, the distillation of the products then in hand 
was carried as high as possible, and a small, very flat heap was finally obtained at 
208°-212°. 
Although there was still considerable doubt whether this heap had been distilled suf- 
ficiently, it was thought best to examine it as it stood. It was consequently treated 
with the diluted sulphuric acid, and subsequently analyzed, as follows: The first, second 
and third portions of acid blackened very much, the third portion less than the 
others, a faint odor of mint being méanwhile developed; the fourth and fifth portions 
of acid blackened much less than the preceeding, and the sixth was but little colored. 
The hydro-carbon was then washed, dried, and boiled with sodium, as usual. 
The largest degree-fraction of the purified product boiled at 212.6° (corrected.) 
On combustion (1.), 0.1481 grm. of it gave 0.1735 grm. water, and 0.4715 germ. 
carbonic acid. After having been again distilled over sodium several times, it was 
again analyzed (II.) as follows: 0.1463 grm. of it gave 0.1680 grm. water, and 0.468 
grm. carbonic acid. Or, 
Found. Theory. 
L IL. 
Carbon 86.83 87.22 Cog 85.71 
Hydrogen 13.03 12.78 Hy 14.29 
99.86 100.00 = 100.00 
A determination of the density of its vapor gave the following result : — 
