CK-12 Foundation
Ck 12: Physics Simulation: Telegraph
[Free Registration/Login Required] Explore the concept of Morse Code and how signals are transferred over great distances by using telegraph machines based on electromagnets using our interactive simulation. A PDF worksheet and a video...
Smithsonian Institution
National Museum of American History: Information Age
This exhibition surveys the history of information technology and its relation to society from the origin of the telegraph to the present. Its emphasis is as much on social as technical change. This support page contains background...
Independence Hall Association
U.s. History: Inventors and Inventions
The industrial revolution in America spawned the inventions of many inventors, who improved technology in many different areas. See how transportation, agriculture, and communications were transformed because of these inventions.
