Results for "Henry, Joseph, 1797-1878"

 
Showing results 1 - 2 of 2 for Henry, Joseph, 1797-1878
  1. SI History Chronology

    Joseph Henry Demonstrates Primitive "Relay" Telegraph

    • Date: 1835

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  3. SI History Chronology

    Joseph Henry Demonstrates His Most Powerful Electromagnet

    • Date: September 1833

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Showing results 1 - 2 of 2 for Henry, Joseph, 1797-1878