RESEARCHES ON THE VOLATILE HYDROCARBON3. 155 



After Treatment tvith Sulphuric Acid, and Distillation in Vacuo. — 0.1 C23 gramme of 

 cymole, by combustion in a stream of oxygen gas, gave 0.5324 of carbonic acid, and 



0.1561 of water. 



Calculated. Found. 



i 



Carbon, Ci* 120 89.55 89.16 



Hydrogen, H 14 14 10.45 10-68 



134 100.00 100.14 



The removal of impurity by treatment with sulphuric acid had therefore hardly a 

 sensible effect on the results of analysis. 



Determination of Vapor Density before Treatment ivith Sulphuric Acid. 



ll 



259° 



Temperature of balance, 



Temperature of oil bath, 



Height of barometer, ..... 740.6 mm - at 5° 



Increment of balloon, 

 Capacity of balloon 



' 



0.4446 

 239 c. c. 



Density of vapor found, . 4.742 



Theory C*, H 14 = 4 volumes, . . 4.6351 



After Treatment with Sulphuric Acid. • 



Temperature of balance, 

 Temperature of oil bath, 

 Height of barometer, 

 Increment of balloon, 

 Capacity of balloon^ 



25°.5 



cr.» 



255 



760 mm - at 26° 



0.4647 



232 c. c. 



Density of vapor found, . 4.7536 



Ditto before treatment with HO S0 3 , . 4-742 



Difference, 



,0116 



the study of 



The results of the two determinations are therefore almost id 

 A comparison of the above results with those obtained in 

 the body from coal-tar naphtha boiling at 170', will show that the two bodies are far 

 from being the same substance, as Mansfield assumed, and that they have a constitu- 

 tional difference of C 2 H a , and therefore doubtless belong to different series. 



Nor, - 1 had hoped to be able to present on this occasion the result, of * study of some of ^h, more 

 important reactions of the hydrocarbons treated of in the preceding pages, - at M, of those m „paH o 

 which I have differed from my predecessors ; but as this work is yet incomplete, and as I am a pr « oc^- 



j- * \,fo,*> a t T will def< r this branch of the subject tor 

 pied with the study of other substances of more immediate interest, I mil derc 



3 - . __j. k— _ thnt the behavior of tb< bodies with re- 



future consideration, in Part III. 



agent ~ 



