« Reply #3 on: January 10, 2013, 11:32:23 PM »
"Signal mirror: Hold one hand out in front of you and sight the target of your signal (airplane, ship, mountaintop) through a gap in your fingers; in your other hand hold the knife a couple inches in front of your sighting eye and, looking just past the edge of the blade, shine a reflection of the sun’s rays on your first hand, then flash this light back and forth across the gap in your fingers to the target. The heliograph as a communications device dates back to the Greeks of the time of Plato, circa 4oo BC, and was still in use even after Hertz and Marconi’s 1890s transmission of information by radio waves: by signalmen in isolated mountain regions during The War to End All Wars, by the U.S. and Canadian Forest Services into the 1940s, by the Australian and British armies into the 1960s, and by the mountain tribal Afghan resistance during the Soviet war of the 1980s."
p 151 The SAK Owner's Manual
« Last Edit: January 10, 2013, 11:34:20 PM by J Mackrel Jones »
The work takes on a life unplanned
and the painter finds the painting directs the hand