During the 19th century, a heliograph was traditionally used to send sun-based signals over long distances.
published by Alphonso on 2021-09-07 18:39:38
Pivoting the mirror in the light, the solider was able to send a signal using the heliograph.
published by Maurine on 2021-11-27 11:42:00
The heliograph was a simple telegraph machine that only needed a mirror and sun rays to function.
published by Aundrea on 2021-03-12 00:38:55
A heliograph was standard issue for many early 20th century militaries as it was used as a solar based communication device.
published by Delora on 2021-03-08 17:18:13
Though the mirror like heliograph was a great way to communicate during the day time, because it requires sunlight it could not be used to message at night.
published by Soledad on 2021-06-13 17:25:52