HELIOGRAPH

1899-1901

Heliograph (HELIO + GRAPH) is a Greek word meaning “sun writer”. Send the light of the sun by the mirror in Morse code to a distant place. Heliograph was used for the first time by General De Wit in the Bohr War (1899-1902)

http://www.prc68.com/I/Images/HelioInst.jpg

http://www.prc68.com/I/Images/HeliographOnShip.JPG