204 MOSQUITO ERADICATION 



of screening over the torn opening and sewing it fast with a 

 strand of thin wire. 



SCREENING NEAR THE SEA-SIDE 



The economical screening of houses close to the sea and exposed 

 to the extreme salt atmosphere of the ocean is a problem. Houses 

 a few hundred yards from the water are not so difficult, but no 

 metal screen seems to last very long on houses close to the salt 

 water. Painting does not alway appear to help matters, and, in 

 some cases, seems to cause more rapid deterioration. 



Ordinary cloth screens are objectionable on account of their 

 interference with ventilation, their sagging and the facility with 

 which they catch and hold dust, etc. Snidow, 1 however, recom- 

 mends a type of cloth screen which has a hard, waxed surface, 

 similar to that of wire. 



Carter 1 reports that at the Chandelcur Islands double bob- 

 binet lasted a full season, while iron screen material endured only 

 three months. 



CONDUCTING A SCREENING CAMPAIGN 



In cases where it has been decided to initiate a screening 

 campaign in a community, the best practice seems to be more or 

 less as follows: 



1. The area should be carefully surveyed, every house being 

 visited and classed, as described earlier in the chapter. Once this 

 is done, some idea of the cost of the campaign can be obtained. 



2. The next step should be to decide upon the best way of 

 doing the work — that is, whether it will be preferable to let each 

 house owner screen his own premises or to have all screening 

 done by the director of the campaign. The writer strongly 

 recommends the latter method, since, in this way, large savings 

 are made possible by consolidated buying and by having a 

 standardized procedure, and the work will be done better and 

 more uniformly. 



3. Owners of properties that require repair prior to screening- 

 should be given a certain length of time in which to make the 

 repairs. Those not worth repairing should be ordered vacated, 

 if practicable, and, if not, nothing should be done toward screening 

 them, as the imperfect results would only tend to discredit the 

 work. 



4. Once the materials are procured, transportation obtained 



x " Transactions of the First Annual Conference of Sanitary Engineers, 

 U. S. Public Health Service, 1910. 



