135 



.was not reduced in quantity. The reason for the oil remaining on the 

 surface of the water I think is due simply to its buoyancy and also by 

 being retained by the wall. (Fig. No. i.) The conclusion reached in this 

 case is that moderate storms or showers have little or no effect upon the 

 oil in the basins. 



With the results of these experiments we hope to solve the sewer-basin 

 problem in Newark this coming season. With this last experiment I have 

 enumerated the most important inspection problems occurring in a large city. 



Other phases of the work could be dwelt upon, if time per- 

 mitted, such as swamps, brooks, ponds, etc. These, however, 

 are treated in another paper. The same methods are used. 



Considering that each of the above violations breed mainly 

 pipiens, the worst species of the pest, I think the point is well 

 taken that even though the fresh water mosquito extermination 

 co'Sts as much as the salt marsh, we get value received in results. 



PRESiDEiNT D'ARNALL — The next paper is consideration of 

 the same subject, ''The Essential Steps in Upland Mosquito 

 Control in the Village and Open Country," by Mr. W. V. Becker, 

 of Newark. 



Essential Steps in Upland Mosquito Control in Village and 



Open Country. 



BY W. V. BECKE^R, B.SC, DEPUTY CHIEE INSPECTOR OE THE ESSEX 

 COUNTY MOSQUITO EXTERMINATION COMMISSION. 



The men engaged in combatting the mosquito pest in New 

 Jersey fall into two' groups : ( i ) Those who believe in mos- 

 quito control, in other words, those whose object is the reduc- 

 tion of the number of adults to the point where adverse criticism 

 of the work is no longer pressing, and (2) those who pin their 

 faith to mosquito extermination, in other words, those whose 

 object is the reduction of the number of adults to the point 

 where their presence becomes a purely academic question. I 

 believe that it is the duty of mosquito' commissions, as organized 

 in this State, to give to the people of their co'unties complete 

 freedom from mosquitoes and not merely partial relief. It is 

 on this basis that I will discuss the essential steps in upland 

 mosquito control in village and open country. 



