187G.] ^7 [Lesley. 



Schuylkill Navigation Company. Elevation of Combs of Dams. 



NAMES OF DAM. 



Fairmount. . . 



Flati-ock 



Plymouth . . . 

 Norristown. . 



Catfish 



Pawlin2;s. . . . 

 Black Kock. . 



Vincent 



Lewis 



Poplar Neck. 

 Kissingers . . . 



Shepps 



Leizes 



Felix's 



Herbiue's . . . 

 Kernsville . . . 

 Blue M'tn. . . 

 Hamraels . . . 



Lords 



Cross Cut. . . . 

 Dam No 



Note. — Levels as taken from a profile in the Penna. Canal Co'.s Office, at 

 Harrisburg, made under the direction of J. Button Steele, Civil Engineer, 

 in 1851. 



LXXI. Union Canal. 



The elevations on the Union Canal, were copied from a statement, giving 

 number and lifts of locks, furnished through th» kindness of Mr. B. B. Leh- 

 man, of Lebanon, Pa., formerly Chief Engineer and Genral Superintendent of 

 the Union Canal. 



PROC. AMER. PHIL08. 80C. XVI. 97. M 



