Vocabulary : Heliogram to Heliometric
Heliogram : A message transmitted by a heliograph.Heliograph : A picture taken by heliography; a photograph. ;; An instrument for taking photographs of the sun. ;; An apparatus for telegraphing by means of the sun's rays. See Heliotrope, 3. ;; To telegraph, or signal, with a heliograph. ;; To photograph by sunlight.
Heliographic : Of or pertaining to heliography or a heliograph; made by heliography. ;; Of or pertaining to a description of the sun.
Heliography : Photography. ;; The description of the sun. ;; The system, art, or practice of telegraphing, or signaling, with the heliograph. ;; An early photographic process invented by Nicephore Niepce, and still used in photo-engraving. It consists essentially in exposing under a design or in a camera a polished metal plate coated with a preparation of asphalt, and subsequently treating the plate with a suitable solvent. The light renders insoluble those parts of the film which is strikes, and so a permanent image is formed, which can be etched upon the plate by the use of acid.
Heliogravure : The process of photographic engraving. ;; A plate or picture made by the process of heliogravure.
