182 EXAMINATION OF A NAPHTHA FROM LIME-SOAP. 
termining these corrected boiling points being the same as that already described by 
one of us.* Most of the statements concerning “ heaps” and quantities of products ob- 
tained refer to the series of distillates, — each representing one degree centigrade of 
temperature, — which were in our possession at the moment, already mentioned, when 
the process of fractional condensation ceased to be employed. 
Amylene = Cy) Hy.— The most volatile product obtained from the naphtha, boiled 
at 33.5°, and the fraction collected between 334° and 35°, persisted, after repeated re- 
distillation, m commencing to boil at 332°, there being evidently no appreciable quan- 
tity of any substance more volatile than this in the naphtha. The quantity of this 
product was small, the sum of all the final fractions between 333° and 55°, not amount- 
ing to 100 ¢.¢ The summit of the heap was at 35°-37°, this fraction amounting to 
about 25 ¢.¢.; the fractions 37°-39° and 39°-41° were also tolerably large, the latter 
being larger than the former. But above 41° all the fractions were exceedingly small, 
as was also the fraction 333°-35.° 
The fraction 35°-37° was selected for analysis. After being treated with diluted sul- 
phuric acid, and alkali, as above described, it was boiled upon metallic sodium. 
The dark sulphuric acid liquor which was obtained during the purification, became 
milky from separation of an oil, and evolved an agreeable, fruity odor when mixed 
with water. 
After the purification, the body boiled, in an ordinary retort containing bits of so- 
dium, at 34.5°-35.6° (corrected). 
On combustion, 0.1215 grm. of the substance gave 0.1682 grm. water, and 
0.3796 grm. carbonic acid, or 
Found. Theory. 
Carbon 85.18 Cio = 85.71 
Hydrogen 15.30 Hip 14.29 
100.48 100.00 . 
Hydride of Amyl=Cy Hy.— The fractions 37°-39° and 39°-41° most probably 
contained a portion of that variety of hydride of amyl, obtained by Schorlemmer + and 
by Warren, { which boils at 38.° But the quantity of material at our disposal is so 
small that we have made no attempt to purify and analyze it. 
Caproylene = Cy. Hy and Hydride of Caproyl=Cy Hy. Next above the prod- 
* Warren, Memoirs of American Academy, [N. S.] IX. 159. 
t Journal of the Chemical Society of London, 1862, XV. 421. 
+ Memoirs of American Academy, [N. S.] IX. 167. 
