Heliograph, c1900. Artist: Anon

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Heliograph, c1900. The Heliograph, a visual telegraph for sending and receiving messages by means of mirrors and sunlight. Here a British signal unit in tropical kit is flashing a message to the fort in the distance. Trade card for Liebig Meat Extract.

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Size: 5096px × 3429px
Location:
Photo credit: © Ann Ronan Picture Library/Heritage-Images / Alamy / Afripics
License: Licensed
Model Released: No

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