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- Heliograph abstract "A heliograph (Greek: Ἥλιος helios, meaning "sun", and γραφειν 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. The heliograph was a simple but effective instrument for instantaneous optical communication over long distances during the late 19th and early 20th century. Its main uses were military, survey and forest protection work. Heliographs were standard issue in the British and Australian armies until the 1960s, and were used by the Pakistani army as late as 1975.".
- Heliograph thumbnail Heliograph-2.jpg?width=300.
- Heliograph wikiPageExternalLink page26.html.
- Heliograph wikiPageExternalLink page28.html.
- Heliograph wikiPageExternalLink vol111jh.html.
- Heliograph wikiPageExternalLink result?q=heliograph.
- Heliograph wikiPageExternalLink kd7aoi.
- Heliograph wikiPageExternalLink Heliograph.html.
- Heliograph wikiPageExternalLink Heliograph.html.
- Heliograph wikiPageExternalLink eliografo.html.
- Heliograph wikiPageExternalLink MkVHeliograph.shtml.
- Heliograph wikiPageID "712727".
- Heliograph wikiPageRevisionID "606593941".
- Heliograph hasPhotoCollection Heliograph.
- Heliograph subject Category:History_of_telecommunications.
- Heliograph subject Category:Optical_communications.
- Heliograph subject Category:Telegraphy.
- Heliograph comment "A heliograph (Greek: Ἥλιος helios, meaning "sun", and γραφειν 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. The heliograph was a simple but effective instrument for instantaneous optical communication over long distances during the late 19th and early 20th century.".
- Heliograph label "Eliografo".
- Heliograph label "Heliograaf".
- Heliograph label "Heliograph (Nachrichtenübertragung)".
- Heliograph label "Heliograph".
- Heliograph label "Heliógrafo (telecomunicaciones)".
- Heliograph label "Héliographe (communication)".
- Heliograph label "Гелиограф (телеграф)".
- Heliograph label "هليوجراف".
- Heliograph label "回光通信機".
- Heliograph sameAs Heliograf_(signalizační_přístroj).
- Heliograph sameAs Heliograph_(Nachrichtenübertragung).
- Heliograph sameAs Heliógrafo_(telecomunicaciones).
- Heliograph sameAs Héliographe_(communication).
- Heliograph sameAs Heliograf.
- Heliograph sameAs Eliografo.
- Heliograph sameAs 回光通信機.
- Heliograph sameAs Heliograaf.
- Heliograph sameAs m.034_ky.
- Heliograph sameAs Q849453.
- Heliograph sameAs Q849453.
- Heliograph wasDerivedFrom Heliograph?oldid=606593941.
- Heliograph depiction Heliograph-2.jpg.
- Heliograph isPrimaryTopicOf Heliograph.