Definitions for "Heliograph"
An apparatus for telegraphing by means of the sun's rays. See Heliotrope, 3.
To telegraph, or signal, with a heliograph.
An instrument which records the duration of sunshine and gives a quantitative measure of the amount of sunshine by the action of the sun's rays upon blueprint paper. A type of sunshine recorder.
A picture taken by heliography; a photograph.
An instrument for taking photographs of the sun.
To photograph by sunlight.
A photomechanical process used to create an intaglio plate by applying a photosensitive gel to the plate, which is then exposed to light.
This article is about the signalling device. For other meanings, see heliograph (disambiguation).