Some articles on visual signalling:
... (employing runners, messengers on horseback, dogs, and carrier pigeons), visual signalling, telegraph, and telephone ... The primary types of visual signalling were Semaphore flags, lamps and flags, lamps and lights, and the heliograph ... In open warfare, visual signalling (employing signal flags and the heliograph) was the norm ...
Famous quotes containing the word visual:
“The visual is sorely undervalued in modern scholarship. Art history has attained only a fraction of the conceptual sophistication of literary criticism.... Drunk with self-love, criticism has hugely overestimated the centrality of language to western culture. It has failed to see the electrifying sign language of images.”
—Camille Paglia (b. 1947)