42 PROCEEDINGS OF THE AMERICAN ACADEMY. 



In the iutermediary product from the separation of octonapliteue 

 and nononaphtene, by prolonged boiling with sodium and treatment 

 with fuming sulphuric acid, Putochin * obtained a hydrocarbon distil- 

 ling at 122°-] 24°, principally at 122°. 5, which corresponded in its 

 composition to the formula CgHis. It gave a chloride different from 

 the corresponding derivative of octonaphtene, and it was therefore 

 accepted as isooctonaphteue. By treatment of the chloride with alco- 

 holic potassic hydrate, isooctonaphtylene was formed with a higher 

 boiling point than naphtylene from octonaphtene. 



The principal features of the Ohio sulphur petroleum which have 

 appeared in the course of this examination are the following. 



1. The crude oil is heavier than the Pennsylvania, and lighter than 

 the Russian oil. In the quantities of the higher distillates, and in its 

 general properties it resembles more nearly the latter. 



2. It differs from other petroleums in the large amounts of sul- 

 phur compounds which exert an influence on the general properties of 

 the oil. 



3. It resembles the Pennsylvania oil in containing below 150° 

 members of the series C„H2,i + 2' although in much smaller quantities. 

 The presence in the Ohio oil of the two isomeric series C„H2„4.2 con- 

 firm the observations of Warren on the Pennsylvania petroleum. 



4. The aromatic hydrocarbons are here present in minute quan- 

 tities, apparently much smaller than in other petroleums. Benzol, 

 toluol, meta- and para-xylol have been identified. The hexahydro 

 series C„H2„ is represented by hexahydroisoxjdol, and very probably 

 by higher members, although this has yet to be determined. Hexa- 

 hydrobenzol and hexahydrotoluol are not contained in this petroleum. 



5. By the formation of characteristic nitro products, and the results 

 of bromine absorption, the presence in the crude oil of unsaturated 

 hydrocarbons C„H2„ seems to be indicated. 



Portions of Ohio petroleum have been thoroughly fractioned, and 

 are now under examination to establish the identity of the octanes, to 

 ascertain whether isooctonaphtene and hexahydromesitylene are pres- 

 ent, and to ascertain whether this petroleum contains a-nonane, boiling 

 point 135°-137°, and /3-nonane, boiling point 129°.5- 131°.5, which 

 Lemoine f asserts is contained in Pennsylvania petroleum. Examina- 

 tion of distillates collected above 150° is now in progress. 



* Ber. der deutsch. chem. Gesellsch., 1885, p. 186. 

 t Bull. Soc. Chim., 188i, XLI. 164. 



