﻿Plate 
  15. 
  

  

  A. 
  The 
  dam 
  at 
  Mechanicville 
  with 
  flash 
  hoards 
  in 
  place. 
  

  

  B. 
  The 
  present 
  dam 
  at 
  Fort 
  Edward. 
  

  

  