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1. SI History Chronology

   Time Capsule Placed in MMT Foundation

   • Date: March 6, 1976

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3. Smithsonian Legal Document

   An Act for the relief of Charles Wilkes, junior

   • Date: 1830 05/05/1830
   • Creator: 21st Congress, Sess. 1, 1830
   • Creator: 21st Congress, Sess. 1, 1830

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   Museum Conservation Institute

   • Date: December 9, 2006
   • Creator: DeLoreto, James
   • Creator: DeLoreto, James

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   Soldering Lamp

   • Date: 1880 1880s
   • Creator: United States National Museum Photographic Laboratory

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   Soldering Lamp

   • Date: 1880 1880s
   • Creator: United States National Museum Photographic Laboratory

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    Unidentified Scientific Instruments

    • Date: 1880 1880s
    • Creator: United States National Museum Photographic Laboratory

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    Joseph Henry Electromagnet Equipment - Telegraph Sounder

    • Date: Undated
    • Creator: Unknown

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    Joseph Henry Electromagnet Equipment - Armature

    • Date: Undated
    • Creator: Unknown

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    Joseph Henry Electromagnet Equipment - Suspended Armature

    • Date: Undated
    • Creator: Unknown

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    Joseph Henry Electromagnet Equipment - Galvonometer

    • Date: Undated
    • Creator: Unknown

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    Joseph Henry Electromagnet Equipment - Compound Spiral

    • Date: Undated
    • Creator: Unknown

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    Joseph Henry Electromagnet Equipment - Galvonometer

    • Date: Undated
    • Creator: Unknown

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