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Heliograph   Listen
Heliograph

verb
1.
Signal by means of a mirror and the using the sun's rays.





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"Heliograph" Quotes from Famous Books



... welcoming any excuse for talk with her. "But it was when we came from Touggourt. Sabine told me there'd been a tremendous storm in the south just before we left Algiers, and the heliograph tower at Toudja was struck by lightning. They'll build it up again soon, for all these heliograph stations are supposed to be kept in order, in case of any revolt; for the first thing a rebellious tribe ...
— The Golden Silence • C. N. Williamson and A. M. Williamson
... the National Forests is had by the use of the telephone and the radio or wireless telephone. Signalling by means of the heliograph is practiced on bright days in regions that have no telephones. Arrangements made with private telephone companies permit the forest officers to use their lines. The efficient communication systems aid in ...
— The School Book of Forestry • Charles Lathrop Pack


Words linked to "Heliograph" :   apparatus, signalise, setup, sign, signal, signalize


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