68 N. J. Agricultural Experiment Station, Bulletin 348 



the ground that with so many outlets it is practically impossible 

 for the drainage of one area to become blocked and that the mainten- 

 ance problem is therefore less difficult. This system has not found 



Fig. i~. Types of tools used. The Maiiahan power ditcher and the ditch 



it cuts. 



favor in New Jersey for three reasons : ( i ) the cost of the system 

 is much greater; (2) the meadows treated in this way are ruined 

 for hay production; (3) the actual mosquito reduction is not mate- 

 rially greater. 



