বন্ধ এবং এর সূর্যের দন্ড ঘুরে মিরর ব্যবহার করে টেলিগ্রাফিক বার্তা পাঠানোর জন্য একটি যন্ত্রপাতি

heliographs's Usage Examples:

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

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

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

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.

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

heliographs's Meaning':

an apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on

Synonyms:

setup; apparatus;

Antonyms:

fire; negativeness; negativity;