EXAMINATION OF A NAPHTHA FROM LIME-SOAP. 191 
sult until such time as a method of properly purifying our first product shall have been 
discovered. The impurity of the material in question appeared, moreover, from the fol- 
lowing analysis: — 0.1656 grm. of the hydro-carbon gave 0.152 grm. water, and 0.5504 
grm. carbonic acid, or 
Found. 
Carbon 90.64 
Hydrogen 10.20 
100.84 
This result indicates that the product still contained some sulphurated compound, 
which, on combustion in the oxygen constantly present in the tube during the analysis, 
forms sulphuric acid; the latter condenses in the neck of the chloride of calcium tube 
and so vitiates the hydrogen determination. 
A portion of the product just analyzed was now digested during twenty-four hours 
with a quantity of concentrated chlorhydric acid, by which it was at once rendered 
milky. After decanting the acid and washing with water, the hydro-carbon was dried 
over hydrate of potash, and finally distilled upon sodium. On combustion, an un- 
weighed portion of it gave 0.1679 grm. water, and 0.6345 grm. carbonic acid, or 
Found. Theory. 
Carbon 90.25 Cia (91.3 
Hydrogen 9.75 Hg 8.7 
100.00 100.00 
The liquid which had been treated with chlorhydric acid was now distilled in vacuo. 
It began to boil at 66°, between which point and 68° a fraction was collected (No. I). 
Another small fraction was then taken off above 98° (No. IL). 
On combustion, 0.1985 grm. of fraction No. I. gave 0.1765 grm. water, and 0.6572 
grm. carbonic acid. 
0.2595 grm. of fraction No. II. gave 0.2244 grm. water, and 0.8579 grm. carbonic 
acid. 
Found. Theory. j 
I. II. 
Carbon 90.07 90.17 Cu 91.3 
Hydrogen 9.87 9.60 Hg 8.7 
99.94 99.77 100.0 
These results correspond respectively with the formule:—I. Cy, Hj.; I. Cy 
Hy, ,; the previous analysis, see above, agrees with the formula Cry Ho The body 
