आरसे वापरून टेलीग्राफिक संदेश पाठविण्याचे उपकरण जे बंद होते आणि सन बार चालू करते,

heliographs's Usage Examples:

Other historical exhibits included five heliographs by Niépce with modern photographers such as Captain Thomas Honywood also.

(such as smoke signals, semaphore telegraphs, signal flags, and optical heliographs), to electrical cable and electromagnetic radiation, including light.

1900s, and fires were reported using telephones, carrier pigeons, and heliographs.

The heliographs were supplied by Brig.

needed] In connection with celestial photography he constructed photo-heliographs for the Wilna observatory in 1863, for the Harvard College Observatory.

a 140-mile-long (230 km) line of heliographs connecting Fort Keogh and Fort Custer, Montana, in 1878.

Synonyms:

setup, apparatus,

Antonyms:

fire, negativeness, negativity,