amazing super simple inventions p e r simple u s telegraph projects I n s p i r i n g E d u c at i o n a l S c i e n c e Ac t i v i t i e s Alex kuskowski Consulting Editor Diane Craig M A Reading Specialist
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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
