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A 19th-century engraving depicts the American inventor Samuel Finley Breese Morse (1791–1872)
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A 19th-century engraving depicts the American inve...

Morse device with Morse key
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Morse device with Morse key

Morse device with Morse key
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Morse device with Morse key

Telegraph key is a switching device used primarily to send Morse code
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Telegraph key is a switching device used primarily...