meaning of heliograph
1. A picture taken by heliography; a photograph.
2. An instrument for taking photographs of the sun.
3. An apparatus for telegraphing by means of the suns rays. See Heliotrope, 3.
4. an apparatus for sending telegraphic messages by using a mirror to turn the suns rays off and on
Related Words
heliograph | heliographic | heliography |
