im. Bulletin No. u. 



a. 



of 

 oa 



6 

 O 

 «3 



t: w 



o >> 



HART 



OF 



MD SHAFT SEC 



IN 

 EW YORK, 



of the Corniferous L 



f. H. MERRILL. 



1 00 feet. 



200 



300 



400 



500 



600 



Contour. 



700 



800 



900 



1000 



1100 

 J 11 50 



