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Heliograph   Listen
Heliograph

noun
1.
An apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on.





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"Heliograph" Quotes from Famous Books



... you will hear from this." And he left in a hurry. He phoned the gendarmes in the city of Ypres and in less than half-an-hour they came. They entered the farmhouse and searched it thoroughly. Upstairs they found parts of a heliograph lamp and a complete telephone apparatus; there was also in his stove a system that had been inaugurated for forcing up a shower of sparks; this apparatus had been found in the houses of a number of spies ...
— S.O.S. Stand to! • Reginald Grant
... second, on the brass clamps of the old Tower musket, but nothing in the Jungle winks with just that flash, except when the clouds race over the sky. Then a piece of mica, or a little pool, or even a highly-polished leaf will flash like a heliograph. But that day was ...
— The Second Jungle Book • Rudyard Kipling


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


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