EXAMINATION OF A NAPHTHA FROM LIME-SOAP. 193 
developed together with an ethereal odor. The first portions of the diluted acid 
became dark-colored and rather thick; but the fifth and last portion of acid was but 
little colored, though still by no means colorless. After washing with a solution of 
caustic alkali, and drying over sticks of. hydrate of potash, it was found necessary to boil 
the product with sodium during a long time, and to distil it repeatedly from the sedi- 
ment which formed, before its action upon this metal became in some degree moderate. 
The dark sulphuric acid liquor became turbid, as usual, when mixed with water, and 
evolved an agreeable ethereal odor. 
Distilled over sodium from an ordinary retort, the boiling point of the purified frac- 
tion 123°-124° was 125.2° (corrected); and that of the fraction 121°-122° was 123.8° 
(corrected). 
On combustion, 0.2278 grm. of the purified fraction 123°-124° gave 0.2994 orm. 
water, and 0.7114 grm. carbonic acid (No. I.). Another portion of 0.19 grm. gave 
0.2504 grm. water, and 0.5917 grm. carbonic acid (No. II). 
Analyses of the purified fraction 121°-122° afforded the following results: 0.1894 
grm. of the hydro-carbon gave 0:2466 grm. water, and 0.5925 grm. carbonic acid (No. 
TiI.). Another portion, not weighed, gave 0.1685 grm. water, and 0.406 grm. carbonic 
acid (No. IV.). Or, 
Found. Theory. 
I II. IIL. IV. 
Carbon 85.16 84.95 85.32 85.55 Cig 85.71 
Hydrogen 14.62 14.63 14.47 14.45 Hig 14.29 
99.78 99.58 99.79 100.00 100.00 
A determination of the vapor density of fraction 123°-124° gave the following 
result : — 
Temperature of balance, ‘ : ‘ ‘ : 2 ‘ ‘ ‘ ‘ ‘ ‘ ag | 322° 
“  oilebath, «© «@ © © ww # 8 8 ow ww oe 178° 
Excess of weightof balloon, .  .  - 6 + ee ee 08843 grim. 
Capacity of uf @. Go oR ke he eh RH , + # & 201 ¢. ¢. 
Air remaining in a ee ee ee oO « 
Height of barometer, : ; Boga . z : , ‘ . : . : 758mm. at 21° 
Density of vapor found, ‘ a by ‘i : ; . ao Se : . - 3.9756 
et i theoretical (C16 Hie), a a ¢ te SB le 3.878 
The sp. gr. of fraction 123°-124° was 0.7396 at 0°; that of fraction 121°-122° 
was 0.7433 at 0°, 0.735 at 12°, 0.7321 at 15°, 0.7305 at 17°. 
After treatment with diluted sulphuric acid, the fraction 125°-126° afforded the fol- 
lowing results on being analyzed: 0.1829 grm. of the hydro-carbon gave 0.2432 grm 
VOL. IX. 29 
