'4 



J'tt.rnji Cur. •\- ' 



l^wt or- iruff^ 

 lintiom 



Corrected t^thf^^rafture 



7, . , 



l>OWN. 



Cor. 



L. 



i.'i'. 



O 

 90O 



300 

 400 



8oo 



UOO 

 lUOO 



J 4«J«J 

 1700 



If/lXJ 



saoo 

 2400 



DREDGE ROPL. 



VP, 



