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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.





WordNet 3.0 © 2010 Princeton University


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"Heliograph" Quotes from Famous Books



... by any "visual" method of signaling, such as flags, heliograph or lamp, it is necessary for the receiver to keep his eyes steadily fixed upon the sender, probably using binoculars or telescope, which makes it difficult, if not impossible, for him to write down each letter as it comes, and as this is absolutely ...
— The Emma Gees • Herbert Wes McBride
... extremely unhealthy spot. He was right; he had barely got the guns under cover elsewhere when the Turks, flying low, came over and heavily bombed the place he had just left! Of course the kerosene tins had been almost as useful as a heliograph, and who would dream of looking for such a thing at ...
— With Our Army in Palestine • Antony Bluett
... may enter close at their heels alleys of the palm wood. Right in front, although the sun is not yet risen, the east is already lighted with preparatory fires, and the huge accumulations of the trade-wind cloud glow with and heliograph the coming day. The breeze is in your face; overhead in the tops of the palms, its playthings, it maintains a lively bustle; look where you will, above or below, there is no human presence, only the earth and shaken forest. And right overhead the song of an invisible ...
— The Works of Robert Louis Stevenson - Swanston Edition Vol. 18 (of 25) • Robert Louis Stevenson


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


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