(ou) 
PUBLICATION 159 
PLATE XIII 
DRAINING THE SaLtt MarsH, Hackensack MEApDows, NEW JERSEY, 1908. 
1. The Manahan ditching spade. 
3. Dragging out sod with ditching spade. 
2. 
4, 
The ditching spade in use. 
A long ditch dug with the ditching spade. 
