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more about heliograph
heliograph |
3 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Heliograph \He"li*o*graph\, v. t. 1. To telegraph, or signal, with a heliograph. 2. To photograph by sunlight. From Webster's Revised Unabridged Dictionary (1913) [web1913]: Heliograph \He"li*o*graph\, n. [Helio- + -graph.]ets> 1. A picture taken by heliography; a photograph. 2. An instrument for taking photographs of the sun. 3. An apparatus for telegraphing by means of the sun's rays. See {Heliotrope}, 3. From WordNet r 1.6 [wn]: heliograph n : an apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on v : signal with a heliograph
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