An apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on.
![]() |
![]() ![]() |
|
![]() | ![]() | ![]() | |||
|
|
|
![]() |
"Heliograph" Quotes from Famous Books ![]() ![]() — Through the Magic Door • Arthur Conan Doyle |
Copyright © 2025 Free-Translator.com |