230 C. M. Warren on the Volatile Hydrocarbons. 
2° f there was any one thing 
ing-point difference among homologous hydrocarbons to be about 
22°. I 
tended to bias me, it was the recent work of Church” on the 
boiling-points in the benzole series, in which he made the boiling- 
i 2° an 1 
d a fraction, a number varyin 
other members, above and below it, were found to be present,— 
an anomaly not easily reconciled with any plausible theory 12 
bodi 
. 
regard to the formation of these bo 
a he 
€xist in this class of su 
dies. In view of these cir- 
bstances 
ally established beyond question the common dif 
prove to be the true di 
series. My confidence 
to EYE and finally, I ‘undertook 
sis of coal-tar naphtha, the results of 
to make a thorough analy- 
which are given in table 3. 
» Philosophical Magazine, 1855, [4], ix, 256. 
- Annalen der Chemie und Pharmacie, 1855, xcvi, 29. 
