1876.] 



]61 



[Lesley. 



CCCV. Pithole Valley B. B. 



Levels on the Pithole Valley R. R. were furnished by Mr. Aug. Mordecai, 

 Assistant Engineer A. & G. W. R. R. at Meadville, Pa. 



STATIONS. 



Oleopolis CCCIV 



Wood's Mills 



Pratlier 



Pit hole City 



Pleasant ville 



Enterprise 



Titusville CCCVI 



Above 

 Oleopolis 







232 

 290 

 615 

 242 

 162 



+ Lake Erie 



446 



678 



736 



1061 



688 

 608 



Ocean Level. 



1019 



1251 

 1309 

 1634 

 1261 

 1181 



CCCVI. Dunkirk, Allegheny Valley and Pittsburgh B. B. 



Levels on the Dunkirk, Allegheny Valley and Pittsburgh R. R., were copied 

 from a list furnished by Mr. Henry E. Wrigley, C. E., who obtained the levels 

 from the Engineer in charge of the road. 



Datum: Lake Erie. 



a State liine of Pennsylvania and New York. 



6 Surface of water outlet of Chatauqua Lake 675 + Lake Erie 573 

 Ocean Level. 



PROC. AMER. PHILOS. SOC. XVI. 97. U 



1248' 



