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Examples of heliograph
heliograph
Canada had the last major army to have the heliograph as an issue item.
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The U. S. Signal Corps heliograph mirror did not tilt.
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During daylight hours when the sun is visible, a heliograph mirror can be used to flash bright, intense sunlight.
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A heliograph was installed in 1879 at Signal Hill, the small rise overlooking the main settlement in Thomson Bay.
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The heliograph is a simple but highly effective instrument for instantaneous optical communication over long distances.
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The heliograph had some great advantages.
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The distance that heliograph signals could be seen depended on the clarity of the sky and the size of the mirrors used.
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There were many heliograph types.
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Heliograph stations were also set up and wireless established, but the wireless was blocked by a more powerful Ottoman transmitter at Gaza.
From the en.wikipedia.org
- An apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on
- Signal by means of a mirror and the using the sun's rays
- A heliograph (Greek: u1F2Du03BBu03B9u03BFu03C2 helios, meaning "sun", and u03B3u03C1u03B1u03C6u03B5u03B9u03BD graphein, meaning "write") is a wireless solar telegraph that signals by flashes of sunlight (generally using Morse code) reflected by a mirror. The flashes are produced by momentarily pivoting the mirror, or by interrupting the beam with a shutter...
- An apparatus for signalling by means of a moveable mirror which reflects flashes of sunlight; A heliogram; An instrument for measuring the intensity of sunlight; A device for photographing the sun; A photograph; To send a message by heliograph; To send a heliograph
- A device consisting of a reflector and shutter that's used for signaling or messaging over long distance by means of sunlight, moonlight, or lantern light; adopted by the U.S. ...
- An instrument which records the duration of sunshine and gives a quantitative measure of the amount of sunshine by the action of the sun's rays upon blueprint paper. A type of sunshine recorder.
- Device for recording the positions of SUNSPOTS.
- Signalling device used in triangulation surveys.
- Instrument used by the Signal Corps.
