View of chemist George Wieczorek (left) and an unidentified chemist using a Geiger counter to measure ionizing radiation in radioisotopes at an unidentified U.S. Department of Agriculture facility. A box of radioisotopes from Oak Ridge National Laboratory is visible on the counter. The U.S.D.A. commonly used radioactive material for a variety of research and testing, including the study of radioactive substances as fertilizer, as well as to model the impacts of radioactive material in soil and test the effectiveness of new insect control techniques or materials.
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“Geiger Counter in Use at U.S. Department of Agriculture Facility,” 1950–1959. Travis P. Hignett Collection of Fixed Nitrogen Research Laboratory Photographs, Box 4. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/c534fn97v.
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