Related terms:
vail
cooke
morse
wire
samuel f
what hath
samuel
telegram
semaphore
wheatstone
telegraphy
patent
telegraph
morse code
inventor
battery
message
invention
receiver
telegraph hill
telegraph cable
optical telegraph
electrical
telephone network
electromagnetic
communication
Wikipedia sources:
Telegraphy
Samuel Morse
Electrical telegraph
Semaphore line
History of the telephone
Telecommunication
Context for words:
electrical
telegraph
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