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Subject Pharmacognosy Remove constraint Subject: Pharmacognosy

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    • 1914 – before 1928

    General view of a female employee analyzing unidentified substances in the Bureau of Chemistry's Pharmacognosy Laboratory. Part of the U.S. Department of Agriculture, the Pharmacognosy Laboratory supervised the…

    • 1914 – before 1928

    General view of employees at work in the Bureau of Chemistry's Pharmacognosy Laboratory. Part of the U.S. Department of Agriculture, the Pharmacognosy Laboratory supervised the manufacture and distribution of crude…