| ??? 04/13/05 08:06 Read: times |
#91497 - Earlier still... Responding to: ???'s previous message |
The first recorded use of a heliograph was in 405 BC when the Ancient Greeks used polished shields to signal in battle, described in Xenophon's Hellenica.
The unpopular Roman emperor Tiberius used a heliograph to rule the Empire from a villa on the island of Capri - sending orders each day to the mainland, eight miles away. See: http://en.wikipedia.org/wiki/Heliograph. |
| Topic | Author | Date |
| Just an Idea | 01/01/70 00:00 | |
| Its called | 01/01/70 00:00 | |
| Many examples | 01/01/70 00:00 | |
| Admiralty pattern, 1944 | 01/01/70 00:00 | |
| Do we need that | 01/01/70 00:00 | |
| I think... | 01/01/70 00:00 | |
| point-to-point | 01/01/70 00:00 | |
| Here's one | 01/01/70 00:00 | |
| Point to point | 01/01/70 00:00 | |
| Good except | 01/01/70 00:00 | |
| problems, problems | 01/01/70 00:00 | |
| aiming... | 01/01/70 00:00 | |
| I just thought | 01/01/70 00:00 | |
| What Google Had to Say | 01/01/70 00:00 | |
| Clever stuff | 01/01/70 00:00 | |
| a whole lot earlier | 01/01/70 00:00 | |
| a whole lot earlier | 01/01/70 00:00 | |
Earlier still... | 01/01/70 00:00 | |
| Duh! | 01/01/70 00:00 | |
| light speed | 01/01/70 00:00 | |
| FM | 01/01/70 00:00 | |
| Nope | 01/01/70 00:00 | |
| Amateur Scientist laser mod/demod | 01/01/70 00:00 | |
| not so fast on the free internet | 01/01/70 00:00 | |
| Land of the free?? | 01/01/70 00:00 | |
| Land of the free?? | 01/01/70 00:00 |