SALT MARSH DRAINAGE 



141 



from one pool or hole to another, and finally into one or more 

 outlets. According to Headlee, 1 the parallel plan is now con- 

 sidered the best practice in New Jersey. 



Hew Jersey Aqriculfurat Cuperimenr 5bHons 



Fig. 100. — Above, parallel, and below, pool-connecting, systems of salt marsh 



ditching. {After Headlee.) 



Referring to the amount of ditching per acre necessary, on the 

 average, to prevent mosquito-breeding in the New Jersey salt 

 marshes, Headlee 1 says: 



1 " Some Recent Advances in Knowledge of the Natural History and the 

 Control of Mosquitoes," New Jersey Agricultural Experiment Stations, 

 Bulletin 306, 1916. 



