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The Electromagnetic Telegraph

  Link Details for: The Electromagnetic Telegraph
Link Title: The Electromagnetic Telegraph Open in a new window
Link URL: http://www.du.edu/~jcalvert/tel/morse/morse.htm
Link Details: A technical history of the 19th-century electromagnetic telegraph by Dr. James B. Calvert.
Category: Top : Society : History : By_Topic : Science : Engineering_and_Technology : Telegraphy
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The Electromagnetic Telegraph