i8 



which is drained not necessarily more than six months in the 

 year, and which can >be flooded during the winter months by 

 leaving" the gates open, certainly will not shrink very much. 



Mr. Gies has spoken about the period when the fish are 

 inactive. I do not see that diking the meadows has anything 

 to do with the inactivity of the fish, and it is quite probable that 

 they would be inactive whether the dikes were there or not. I 

 believe that it is quite possible to cause currents to flow through 

 these ditches, by opening some gates and keeping others closed, 

 allowing a high tide to enter one side of an area, and to go 

 out the other side. 



The President — The next paper is by Mr. William Delaney, 

 of Jersey City. Mr. Delaney needs no introduction from me. 

 You all know him as a mosquito fighter, capable and efficient, and 

 it is a pleasure to introduce him. 



The Place of Pumps in Mosquito Extermination. 



BY WIUUIAM DELANEY, SUPERINTENDENT OF HUDSON COUNTY 

 MOSQUITO EXTERMINATION COMMISSION, JERSEY CITY, N. J. 



It is not my intention, nor privilege, to enter into> a discussion 

 of the merits or demerits of dikes, nor their place, but to con- 

 sider very briefly the "Place of the Pumps in Mosquito Reduction 

 Work," because it is no longer an experiment, but rather an estab- 

 lished economic proposition, under certain conditions, of course. 

 I think we may, with profit, consider briefly this subject, because 

 I am willing to hazard the opinion that in the not distant future 

 the pump will find a place on the land side of every dike ; hence, 

 if you desire to establish permanent places for pumps, continue 

 to build dikes. 



We have in our county a greater, more extensive system of 

 diking than exists in all the other counties of the State. The 

 dike on the west side of the Hackensack River extends from the 

 Lincoln Highway north to Saw Mill Creek— the dividing line of 

 Hudson and Bergen Counties — a distance of about four and one- 

 half miles. This dike was constructed about 1867 for reclama- 



