1876.] 



89 



[Lesley. 



L VI. Wilmingtoti and Beading E. E. 



These levels of the Wilmington and Reading R. R. were furnished by Mr. E. 

 Collings, Superintendent. 



The datum, or base of levels, is low tide at Wilmington, Del. Relation of 

 Ocean Level to this datum is unknown. 



STATIONS. 



Birdsboro Junction (a) L 



Hampton 



White Bear 



Gei^ertown 



Cold Run 



Joanna 



Springfield 



Conestoga 



E. B. & W. R.'R."CrossYng(J).ji 



Beaver 



Honeybrook 



Manor 



Hibernia 



Brandywine 



Coatesville (c) I 



Modena 



Mortonville 



Laurel 



Embreiville 



Glen Hall 



Northbrook 



Seeds 



Lenape 



Pecopson 



Chadd's Ford 



Smith Bridge 



Centre 



Dupont's 



Wilmington 



a Junction with Philadelphia and Reading R. R. at Birdsboro, Berks County, 

 Pennsylvania. 



b Junction with E. Brandywine and Waynesburg R. R., Chester County, Pa. 



c The Pennsylvania R. R. track on bridge just west of Coatesville Station is 

 62' higher than track on W. & R. R. R. The elevation on Pennsylvania R. R. at 

 the point where it crosses the W. & R. R. R. is 374' above tide. By deducting 62' 

 according to Pennsylvania R. R. datum the elevation would be 311!'. The datum 

 of the Pennsylvania R. R. is high tide in Schuylkill River. The datum of W. 

 & R. R. R. is low tide at Wilmington. 



PROC. AMER. PHILOS. SOC. XVI, 97. L 



