Heliograph
Posted: Mon Apr 02, 2007 2:36 am
In "Men of men" a gizmo called a Heliograph is being used. I had never heard of that before, and although I understood how it worked from the book, I searched the Internet and found this on Wikipedia.
Heliograph
The best part in that article is:
Heliograph
The best part in that article is:
By the time the mirror instruments were retired in 1941, they were seldom used for signalling. Still, the army hated to see them go as "They made damn fine shaving mirrors."