Heliograph used by British army in Africa
Heliograph used in the British army in Africa, probably during the Boer War (1899-1902). The heliograph is a wireless telegraph that signals by flashes of sunlight (generally using Morse code) reflected by a mirror
Picture No
12695442
Media ID
47675602
Size
3843px x 4450px
(3.8MB)
Credit
Mary Evans Picture Library
Source
Engraving in Album de la Science, page 155
Date
C.1900
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Boer Heliograph Morse Optical Sep19 Telegraphy Wireless
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