VERB
- signal by means of a mirror and the using the sun's rays
NOUN
- an apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on
How To Use heliograph In A Sentence
- The most important advantages of this form of spectroheliograph is the large field photographed.
- A heliograph was a communications system consisting of two mirrors on a tripod used to flash signals with sunlight.
- Basically, the spectroheliograph has two spectrographs mounted back-to-back.
- Organised divers always carry some means of signalling their position at the surface, whether it be air-horn or flag, flare or heliograph, or combinations of two or more.
- In this world of the twenty-first century, with all but five per cent of the population concentrated in the mechanized cities, to be out here, miles from civilization, beyond all hope of communication, off the regular air lanes and without radiophone or heliograph. "The Barrier" by Harl Vincent, part 4
- I might as well have used a heliograph to yoo-hoo them over here. BLOOD IS DIRT
- Paradise enow moratorium nub aural whilom incessantly heliograph Language
- An earlier version of the heliograph known as the heliotrope was used during the American civil war.
- Well, I was gonna chime in earlier on the clearly delusional heliograph, but it appears my work has been done for me. Polls Contradict Rudy's Blue-State Claim
- A heliograph was a communications system consisting of two mirrors on a tripod used to flash signals with sunlight.
