The telegraph was an electrical network that enabled transmission and receiving of coded electrical signals across wires. The system, used first in Britain and then the United States, was largely developed by Samuel F. B. Morse, and was first demonstrated publicly ...

  • Loading...
locked icon

Sign in to access this content

Get a 30 day FREE TRIAL

  • Watch videos from a variety of sources bringing classroom topics to life
  • Read modern, diverse business cases
  • Explore hundreds of books and reference titles