EXAMINATION OF A NAPHTHA FROM LIME-SOAP. 195 
during the acid treatment a quantity of a difficultly volatile compound, which, at a 
temperature between 150°-160°, becomes black and undergoes decomposition, while 
much sulphurous acid is given off. 
The first portion of distillate from the above, having been washed with an alkaline 
solution to remove sulphurous acid gas, was analyzed, with the following result: 0.199 
grm. of the hydro-carbon gave 0.2226 grm. water, and 0.6403 grm. carbonic acid. 
Or, 
Found. 
Carbon 87.74 
Hydrogen 12.41 
100.15 
These numbers correspond with the improbable formule Ci, Hhsss. We entertain, 
however, little doubt that the substance analyzed is really a mixture of xylole (Cy 
H,,), the boiling point of which is at 140°, and of a hydro-carbon, of the C, H, 
series, boiling at 155°, or thereabouts, which will be described directly. 
An attempt was made to separate a purer sample of xylole by repeatedly redistilling 
the heap and collecting apart the portion more volatile than 140°, this being subse- 
quently reworked, together with the small fractions which had previously been left 
between 130° and 140°. By this means a small heap was finally obtained, the summit 
of which was 135°-136°. This heap was treated with diluted sulphuric acid, the first 
portion of which blackened much, the second portion to a less extent, the third still 
less, and the fourth but little. After washing, drying, and distilling with sodium, in the 
usual way, a portion was analyzed with the following result: 0.181 grm. of the hydro- 
carbon, purified with dilute acid, gave 0.1905 grm. water, and 0.5858 grm. carbonic 
acid. Or, 
Found. 
Carbon 88.29 
Hydrogen 11.71 
100.00 
This result corresponds with the formula Ci, Hy; the body still containing far 
more hydrogen than pure xylole. But as this subsidiary heap is probably contaminated 
with hydride of capryl (boiling at 128°), we have made no further attempt to purify 
it by treatment with acids. 
Pelurgonene = Cig Hyg. About 148°-150° was a rather large heap, amounting to some 
500 ¢.¢. This retained a little of the offensive odor of the crude lime-soap naphtha, 
