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  1. SI History Chronology

    Magnetic Observatory to be Built at SI

    • Date: February 3, 1853

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  3. SI History Chronology

    Smithsonian Receives First Annual Appropriation for Care of National Collections

    • Date: June 2, 1858

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  5. SI History Chronology

    Smithsonian Act of Organization Passes

    • Date: August 10, 1846

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Showing results 1 - 3 of 3 for Twitter