The smoke signal is one of the oldest forms of long-distance communication. It is a form of visual communication used over long distance.
Read more about Smoke Signal: History and Usage
Famous quotes containing the words smoke and/or signal:
“Than smoke and mist who better could appraise
The kindred spirit of an inner haze?”
—Robert Frost (1874–1963)
“Change begets change. Nothing propagates so fast. If a man habituated to a narrow circle of cares and pleasures, out of which he seldom travels, step beyond it, though for never so brief a space, his departure from the monotonous scene on which he has been an actor of importance would seem to be the signal for instant confusion.... The mine which Time has slowly dug beneath familiar objects is sprung in an instant; and what was rock before, becomes but sand and dust.”
—Charles Dickens (1812–1870)