100 C. M. Warren on the Volatile Hydrocarbons. 
had come over between 108° and 109°, would distil eight-tenths 
between 103° and 104°, after repeated purification with sodium. 
I would therefore state that my preparation of toluole was never 
subjected to a temperature above its boiling-point; and that I 
ave never noticed any reduction of the boiling-point of this 
body by purification with sodium. 
Analysis.—0°1628 gram of toluole gave, by combustion in a 
stream of oxygen gas, 0°5447 of carbonic acid, and 0°1815 of water. 
Calculated. Found. 
Carbon, Se 84 91:3 91:20 
Hydrogen, me 8 87 8:97 
92 100°0 100°17 
Determination of Vapor Density.— 
Temperature of balance, 8 he 
Temperature of oil bath, 
Height of barometer, 760°1™™ at 15° 
Increment of balloon, 
Capacity of balloon, 249°5 cc 
Density of vapor found, 3°2196 
Theory, C,,H,=4 volumes, 3°1822 
3. XYLOLE (Cumole of Mansfield and Ritthausen).—Specific 
gravity, 0°878 at 0°, and 0°866 at 15°'5. 
Determination of Boiling-point.—This determination was made 
in all respects like that of benzole, the xylole employed having 
been also subjected to the same treatment. The quantity ope- 
ral n was, however, smaller, and the experiment conducted 
more rapidly. Distillation began at 138°-6, and terminated at 
139°, having distilled almost to dryness. The time occupied 
Ww: venteen minutes. ‘Taking the average of these observa- 
tions, viz: 138°-4, and applying the customary corrections, we 
find 139°°8 to be the corrected boiling-point of xylole. 
Analysis.—0°1333 gram of xylole gave, by combustion in a 
stream of oxygen gas, 0-441 of carbonic acid, and 0:1185 of water. 
Calculated. Found. 
Carbon,  C,, 96 90°57 90-29 
Hydrogen, H,, 10 9°43 9°87 
106 10000 10016 
Determination of Vapor Density.— 
emperature of balance, 16°5 
perature of oil bath, 
Height rometer, 760™™ at 14° 
Increment of balloon, 0°35 
Capacity of balloon, 228 c. ¢. 
Density of vapor found, 3°7517 
Theory, C,,H,,, 36665 
