To: sionnsar
Your link made me look it up to understand it better. Thanks!
Optical telegraphy dates from ancient times, in the form of hydraulic telegraphs, torches (as used by ancient Greeks) and smoke signals.
Wiki
1,163 posted on
04/13/2008 4:24:21 PM PDT by
fanfan
("We don't start fights my friends, but we finish them, and never leave until our work is done."PMSH)
To: fanfan
“Knock, knock.”
“Who’s there?”
“Little old lady.”
“Little old lady who?”
“I didn’t know you could yodel!”
Yodeling is also a cool way of communication.
To: fanfan
A little research from your link got me to
a book I used to have (it went when I cut my SF collection from 3000 to 300 books).
1,179 posted on
04/13/2008 4:33:15 PM PDT by
sionnsar
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