*6o 



THE IMPROVEMENT OF RIVERS. 



The cost of this weir per lineal foot was $105 for the fixed parts and $48 for the 

 movable parts, or a total of $153. 



Remarks. The Desfontaines wicket is the simplest and most easily oi>erated of 



any movable dam and is not expensive, and had its advantages been better known 

 it would doubtless have been more vvicMy applied. It has been urged against it 

 that the masonry and recess were expensive, but as it is only applicable to weirs which 



