The world became a lot smaller March 21, 1850, when the first telegraph message was sent between St. Louis and Cape Girardeau. Thanks to the miracle of Morse code, Cape had immediate access to news ...

Telegraph relays amplify an electrical signal in a telegraph line. Telegraph messages travel as a series of electrical pulses through a wire from a transmitter to a receiver. The pulses fade in ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. Telegraph relays amplify an ...