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FOR HEALTH AND SANITATION DEPARTMENTS

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Modern municipalities find multiple uses for the helicopter for aerial dusting of marsh and swamplands for mosquito control and malaria prevention. They use it for aerial photos of sites and surrounding areas to determine selection of public dumps..to track down sources of water supply pollution.

The City of Los Angeles has used the helicopter to advantage in patrol and survey work for smoke and smog abatement. In Cincinnati extensive air pollution studies are currently in progress. St. Louis Park, Minnesota, suburb of the Twin Cities, found the helicopter ideal in their fight against mosquitoes in large swampy lowlands. Truck-mounted sprayers had failed to intimidate the mosquitoes, but two larval-control sprays of breeding areas plus three adult-control sprays of the entire city by helicopter solved the problem.

Maneuverability of the helicopter makes it possible to reach areas surrounded by obstacles, bogs or other places inaccessible to ground spraying methods. Thoroughness of helicopter spraying far surpasses any other method, since control of the spray is excellent and the downdraft created by the helicopter's rotors forces the spray down through the foliage for complete coverage.