Heliograph (Noun)
Meaning
An apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on.
Classification
Nouns denoting man-made objects.
Examples
- The soldiers in the desert used a heliograph to send urgent messages to headquarters about the location of the enemy troops.
- During the 19th century, the British military employed heliographs to coordinate troop movements across vast distances.
- In the 1860s, the Great Indian Mutiny was quelled in part due to the successful use of heliographs by British forces.
- Captain Scott's expedition to the Antarctic used a heliograph to communicate with the support ship over long distances.
- The heliograph played a crucial role in the Boer Wars by allowing British forces to rapidly relay messages between outposts and command centers.