અરીસાઓનો ઉપયોગ કરીને ટેલિગ્રાફિક સંદેશા મોકલવા માટેનું એક ઉપકરણ જે તેના સનબારને બંધ અને ચાલુ કરે છે,

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,