	Jack Duke, founder of Duke Metering Equipment Company, is a 25-year aerial applicator veteran who knows how an aerial metering device should operate. He has designed and currently produced just such a piece of equipment. His knowledge in this specialized field has given him insight into the needs of the aerial applicator that could not have come from any other source. As a result of his personal research and mechanical capabilities, he has built and field-tested an effective metering device for accurately measuring insecticides, herbicides and a wide variety of sizes and types of seeds most commonly broadcast through aerial application.