40 N. J. Mosquito Extermination Association 



arrangement with the Du Pont Company, a 30-inch ditch extending 

 to a point near the gate, was widened to 60-inches, and connected 

 with the drainage system of the Belleville Turnpike culverts near the 

 upland. The total length of the new ditch is 8,450 feet (1.6 miles), 

 and the work cost $2,475.00, of which the Du Pont Company paid 

 $800. The 36-inch cast-iron pipe under the Newark and Paterson 

 Branch of the Erie Railroad, near Frank Creek, through which 

 insufficient drainage was obtained, on account of its elevation, was 

 lowered 20 inches by the railroad company, providing a very good 

 outlet for an extended acreage of reed swamps, running back of the 

 Belleville Turnpike, and the necessary ditches made thereto, con- 

 necting that territory with the large electric pump. 



The commission succeeded in having filled in by the Central Rail- 

 road Company, a large and troublesome swamp oni their property in 

 lower Jersey City, south of the Morris Canal, thus doing away 

 with a bad breeding area which required careful attention and a 

 frequent use of oil. Similar breeding places on property of the 

 Public Service Corporation in Hoboken and Jersey City were elim- 

 inated in like manner. Sewer catch-basins were oiled regularly dur- 

 ing the four months from June to September. The total quantity 

 of oil used for all purposes was 13,401 gallons: 7,532 gallons «n 

 the salt marsh and 5,869 gallons on the upland. 



It is estimated that the commission was assisted during the season 

 in mosquito-reduction work in the county, including the Town of 

 Kearny, the Dupont Company, railroad corporations, and others, to 

 the extent of $8,810.10. 



The season opened unusually early on account of the mild winter 

 and early spring, breeding being found on the meadows on March 

 10, which is about three weeks in advance of the usual season in the 

 northern counties. However, as a result of preventive measures and 

 work previously done, the mosquitoes did not emerge in sufficient 

 numbers to cause trouble except in the northern part of the county, 

 where pipiens became troublesome about the middle of July. Previ- 

 ous to that date and until July 25, at the cessation of the heavy and 

 continuous rains for a period of 9 days, only a few of any species 

 were to be found in any part of the county. The unusually heavy 

 precipitation, however, in mid-July, caused the cessation of all 

 preventive work and found our limited forces and equipment in- 

 adequate to cope with the conditions ; hence, the July brood of salt- 

 marsh mosquitoes became troublesome, particularly so on the west 



