ttoinou a day ago

It’s also fascinating this didn’t existed 300 years sooner (with more towers because of poorer telescopes). Communication of information across a kingdom is so important

ahazred8ta a day ago

There are many places called Telegraph Hill that used to be semaphore towers.

  • dredmorbius a day ago

    That would include the one in San Francisco, with which some readers may be familiar.

trhway a day ago

If i remember correctly the laser optical transmission tech started as a "laser visual telegraph" between 2 PARC buildings rooftops in the Stanford Research Park here.

anthk a day ago

Ah, so that's the origin of semáforo in Spanish, which the current meaning is "traffic light". And a semaphore on programming, too.

  • Rygian 17 hours ago

    The word "semáforo" literally means "carrier of meaning" from the Greek σῆμα (sêma) meaning 'signal' and ‒́foro meaning 'carrier'.

    The visual telegraph is just one such instance of a "carrier of meaning".

    • anthk 11 hours ago

      Ah, well, like semantics... right. I didn't know about 'foro/phoro'.

      >meaning

      Could it mean 'symbol' too?