Century Dictionary and Cyclopedia
- n. A method of signaling between distant points by means of the heliograph.
- n. In general, photography; specifically, some special photographic process; photographic engraving. See the extract, and heliographic engraving, under heliographic.
- n. The description and mapping of the surface of the sun.
- n. The scientific study of the sun
- n. The art of making a heliograph
- n. The system of signalling by heliograph
GNU Webster's 1913
- n. The description of the sun.
- n. The system, art, or practice of telegraphing, or signaling, with the heliograph.
- n. An early photographic process invented by Nicéphore 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.
- n. Archaic. Photography.
““Monsieur Niépce has developed something called heliography.””
“They also described Niepce's earlier processes, heliography and the physautotype , but presented the daguerreotype alone as having a future.”
“Niépce said his interest in heliography was primarily to improve lithography, his longtime passion.”
“I wish Miss Young would teach us heliography next term," said Honor.”
“Far more conflicting are the theories as to his constitution, of which indeed we may truly say very little was known before the application of photography and the spectroscope to heliography within the last seven years.”
“A treatise on the sublime science of heliography, satisfactorily demonstrating our great orb of light, the sun, to be absolutely no other than a body of ice!”
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