Encyclopedia > Smoke signals

  Article Content

Smoke signals

Smoke signals is an early form of the optical telegraph, developed by the native North Americans. By covering an open fire with a blanket, and suddenly removing it for a short time, a puff of smoke is generated. With some training, the sizes, shapes of, and intervals between these puffs can be controlled in a way that can be observed from a long distance, and used to carry information.



All Wikipedia text is available under the terms of the GNU Free Documentation License

 
  Search Encyclopedia

Search over one million articles, find something about almost anything!
 
 
  
  Featured Article
Anna Karenina

... of Dolly's sister Katarina (Kitty) whom he has previously been courting. As the novel opens, Stiva's friend Levin has returned Moscow from his country estate with the ...

 
 
 
This page was created in 35.1 ms