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1. SI History Chronology

   Exhibits Modernization Allotment Given

   • Date: 1957

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3. SI History Chronology

   SI/Signal Corps Experimental Aviation

   • Date: February, 1918

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5. SI History Chronology

   National Museum Act Reauthorized

   • Date: June, 1980

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7. SI History Chronology

   River Basin Surveys Cut

   • Date: 1954

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9. SI History Chronology

   Capital Improvement Program Authorized for NZP

   • Date: October 4, 1961

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11. SI History Chronology

    Congress Approves SI Building Fireproofing

    • Date: August 30, 1890

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13. SI History Chronology

    Hirshhorn Museum Appropriation Passed

    • Date: July 26, 1968

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15. SI History Chronology

    First Astrophysical Observatory Appropriation

    • Date: March 3, 1891

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17. SI History Chronology

    Five-Year Perspective Approved

    • Date: January 22, 1979

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19. SI History Chronology

    Marble and Tile Floor for A & I Bldg

    • Date: 1881

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21. SI History Chronology

    Annual Funding for Government Collections

    • Date: March 2, 1861

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23. SI History Chronology

    MHT Appropriation Bill Passed

    • Date: February 21, 1956

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