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13 to 15 of 15
  • Classification / Category: Telegraph Relay  
  • Artist / Maker / Culture: General Electric Company  
  • Artist / Maker / Culture: George R. Agassiz Station, Harvard  
  • Artist / Maker / Culture: L. E. Knott Apparatus Company  
  • Artist / Maker / Culture: Department of Physics, Harvard University  
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Department of Physics, Harvard University (15)
Western Electric Company (10)
American Telephone and Telegraph Company (4)
American (2)
Automatic Telephone Manufacturing Company, Ltd (1)
U.S. Electrical Supplies (1)

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Telegraph Relay (15)

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telegraph repeater

telegraph repeater

American
1890-1920
telegraph test board relays and sounder

telegraph test board relays and sounder

U.S. Electrical Supplies
1910-1920
two-way telegraph repeater

two-way telegraph repeater

Western Electric Company
1900-1920
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The Collection of Historical Scientific Instruments
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