Definition of "heliography" []

• The scientific study of the sun (noun)
• The art of making a heliograph (noun)
• The system of signalling by heliograph (noun)

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• "“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."