heliograph

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Words related to heliograph

an apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on

Related Words

signal by means of a mirror and the using the sun's rays

References in periodicals archive ?
Many prayers were offered up for his soul, and a few days later when we marched down the main road towards the line, with the sun shining brightly and striking on our polished brasses, the enemy in their observation balloons must have thought that hundreds of small heliographs were moving into action.
The show opened with a series of works on paper--lithographs, heliographs, silk screens, and posters--that dated from 1952 to 2000.
Commercial photography came in existence roughly at the same time that he arrived in the city, but when he opened his studio a few years later, in 1844, there were already numerous established studios catering to a public in love with the idea of cheap, faithful portraits of themselves--"sun drawings," "sun pictures," "heliographs," as the earliest names for photography had it.
The CIF was tasked to operate forward of lines of communication and wireless had moved to the top of the list of alternatives, displacing everything from pigeons to heliographs.
AriaraOs decorative flair is accentuated by striking wall hangings, heliographs and ceramics made by Filipino artist Ugu Bigyan.
In earlier times, telecommunications involved the use of visual signals, such as beacons, smoke, semaphore telegraphs, signal flags, and optical heliographs, or audio messages via coded drumbeats, lung-blown horns, or sent by loud whistles, for example.
In earlier times, telecommunications involved the use of visual signals such as beacons, smoke, semaphore telegraphs, signal flags, and optical heliographs, or audio messages via coded drumbeats, lung-blown horns, or sent by loud whistles, for example.