"For his project, he investigated the problem of controlling house flies, testing the effectiveness of numerous commercial insecticides. He found the most effective bait to lure test flies to his traps was a fresh mixture of hamburger, coffee grounds, tomatoes, and lettuce."
The Science Service. “Supplementary Information for the Twelfth Annual Science Talent Search,” 1953. Smithsonian Institution Archives, Record Unit 7091, Box 401, Folder 5.
