Science: Useful Fog

Along Long Island's Jones Beach rolled a truck, laying a curtain of thick white fog like a smoke screen. Within a few minutes, flies and mosquitoes in its path were observed to stagger and collapse. In half an hour, every insect on the beach was dead. Next day, the four-mile beach area got another fog dose. By the time weekenders arrived, a few hours later, the DDT beach test was clearly a "100% success."

This spectacular show was staged last week to demonstrate one of the most promising methods yet found for applying the wonder insecticide, DDT....

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