Telegraphs Samuel Morse Then to Now Be an Inventor Materials Semaphore Flags Flag Alphabet Electric Magnet Telegraph Morse Code Flash Telegraph Conclusion Quiz Glossary 4 6 8 10 12 14 16 18 20 26 28 30 31 32
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
