SALT MARSH DRAINAGE 

 MACHINE DITCHING 



143 



Several types of ditching machines are used in salt marsh 

 mosquito control work. Headlee 1 mentions a machine consisting 

 of a gasoline power plant, equipped with revolving drums in 



(Photos by Atlantic County, V. J., Mosquito Extermination Commission.) 

 Fig. 101. — Above, left, front view of the Eaton ditches, showing plow in 

 distance; above, right, rear view of the plow, showing the ditch and the way sods 

 are disposed of; below, a ditch cut by the Eaton ditcher. 



front and rear, and a plow or trencher which makes the excava- 

 tion. The power plant, mounted on planks, pulls the trencher 

 forward by means of a 500 foot steel cable; when it becomes 

 necessary to move the power plant, an anchor is carried forward, 

 power is applied to the other drum, which is connected with the 



