58 



of sylvestris from fresh-water swamps in the vicinity partially 

 nullifies the benefit of our work and detracts from public appre- 

 ciation of it. It is, therefore, our intention to hasten the com- 

 pletion of the salt-marsh drainage in order that the activities of 

 the Commission may be directed to the drainage of the fresh- 

 water swamps lying adjacent to municipalities which are carry- 

 ing on local campaigns. 



Experience has shown us that as long as sylvestris are present 

 to annoy any town the residents cannot be made to appreciate 

 the benefits accruing to them from the salt-marsh drainage and 

 house-to-house canvasses. 



Chairman Brinke:rhoi^:^ — Somerset County, by Mr. E. E. 

 Feickert, of Plainfield. Is Mr. Feickert here? 

 (No response.) 



Mercer County, by Dr. Ulric Dahlgren. 



Status of Mosquito Control Work in Mercer County. 



BY UI^RICH DAHI,GRE:N, PH.D., ASSOCIATE: PR0I^E:SS0R OF BIOI.OGY, 



prince:ton university. 



Mr. Chairman and gentlemen, as I shall take up some time 

 ^ in the convention to-morrow by discussing this matter under the 

 head of ''The Local Problem of Malaria," I will give you merely 

 the basic facts to-day. 



In Mercer County, in the neighborhood of Princeton, where 

 we have been seriously troubled with malaria, we made a survey 

 of conditions about two years ago, found the malarial mosqui- 

 toes present, organized a committee, secured $10,000, half from 

 certain Princeton citizens and half from the county, drew up 

 plans of work to eliminate the mosquitoes, and succeeded in 

 getting the County Mosquito Commission to handle the work. 

 The Commission employed Mr. Sincerbeaux to carry out the 

 plans. The results were that whereas two years agO' we had 

 167 cases of malaria, this last year, although the work was .not 

 completed, we had 8 cases, and that in spite of the very wet 



