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Subject Radioactive substances--Testing Remove constraint Subject: Radioactive substances--Testing

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    • 1952

    General view of an unidentified technician working within a stainless steel hood used to grow experimental plants at the Dow Chemical Company's Spectroscopy Laboratory. At the laboratory, radioactive isotopes were used…

    • 1950s – circa

    Two views of a chemist inserting radioactive materials into an apparatus at an unidentified U.S. Department of Agriculture facility. The U.S.D.A. commonly used radioactive material for a variety of research and testing,…

    • 1950s – circa

    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…

    • 1950s – circa

    View of chemist George Wieczorek (right) and an unidentified chemist using a Geiger counter to measure ionizing radiation in an unknown substance at a U.S. Department of Agriculture facility. The U.S.D.A. commonly used…

    • 1950s – circa

    General view of assorted containers and components used to house radioactive materials. The jar labels include space to record the isotope, amount, and date. These containers are believed to have been used as part of…

    • 1950s – circa

    Close-up view of the handling of radioactive material at an U.S. Department of Agriculture facility. The U.S.D.A. commonly used radioactive material for a variety of research and testing, including the study of…

    • 1950s – circa

    George Wieczorek (right) and two unidentified chemists handling radioactive material at an U.S. Department of Agriculture facility. The U.S.D.A. commonly used radioactive material for a variety of research and testing,…