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  1. SI History Chronology

    Heyman Becomes Secretary

    • Date: September 19, 1994

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  3. SI History Chronology

    Ground is Broken for NASM

    • Date: November 20, 1972

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  5. SI History Chronology

    Adams Announces Retirement Date

    • Date: September 13, 1993

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  7. SI History Chronology

    Secretary Wetmore Retires

    • Date: December 31, 1952

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  9. Online Publications

    Transcript of Joseph Henry's Program of Organization

    • Date: 1847

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  11. SI History Chronology

    Secretary Carmichael Retires

    • Date: January 31, 1964

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  13. SI History Chronology

    Term "National Museum" Enters Usage

    • Date: June 1868

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  15. SI History Chronology

    G. Wayne Clough Named 12th Secretary of Smithsonian

    • Date: March 14, 2008

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  17. SI History Chronology

    Secretary Walcott Dies

    • Date: February 9, 1927

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  19. SI History Chronology

    Samuel Langley Appointed Acting Secretary

    • Date: February 10, 1887

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  21. SI History Chronology

    Charles G. Abbot Retires as Secretary

    • Date: June 29, 1944

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  23. SI History Chronology

    Leonard Carmichael Becomes Seventh Smithsonian Secretary

    • Date: January 2, 1953

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