telegr aphs AN INTRODUCTION What came before telephones and computers messages They used the telegraph many miles in a few seconds Samuel Morse was a telegraph innovator Find out what he did Learn how the telegraph works Discover it for yourself
aphs computers How did people send fast telegraph It used electricity It sent messages
different kinds of telegraphy FLAG FLA G SEMAPHORE SES MAP ORE ELECTRIC SMOKE SIGNALS Telegraphy means distance writing Most kinds require the receiver to be within sight The electric telegraph changed that
