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  1. Joseph Henry Demonstrates His First Telegraphic Apparatus, a Bell-Ringer

    Joseph Henry Demonstrates His First Telegraphic Apparatus, a Bell-Ringer

    • Date: 1831-1832

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  3. SI History Chronology

    Joseph Henry Demonstrates Primitive "Relay" Telegraph

    • Date: 1835

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  5. SI History Bibliography

    Joseph Henry: Inventor of the Telegraph?

    • Date: 1999-2007
    • Creator: Hochfelder, David 1965-
    • Creator: Hochfelder, David 1965-

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Showing results 1 - 3 of 3 for Students