The measurement of Earth circumference by Eratosthenes is still a nice application of (solar) synchronisation... http://en.wikipedia.org/wiki/Eratosthenes The Time Balls (for example at USNO, DC, USA and Real Observatorio de la Armada in San Fernando, Andalucia, Spain are also nice early (one way) synchonisation devices. In Nice, France, there is still a solar triggered gun which annouce Noon to the inhabitants of the city since the Medieval Age (I don't have the exact date). The clocks on bellltowers had no other purpose either... In fact, astronomy didn't needed synchronisation in ancient times, they were providing _the_time_definition_, hence synchronisation. In Islam at least, the basic religious events are still based on direct astronomic observations... (New Moon in particular) Have a nice day, Jean-Louis ----- Original Message ----- From: "Bill Hawkins" <[email protected]> To: "'Discussion of precise time and frequency measurement'" <[email protected]> Sent: Wednesday, March 18, 2009 8:35 PM Subject: Re: [time-nuts] Railway Time and Standard Time
> Thanks, Arnold. > > It's my impression that the need for time synchronization grew out of > the need to schedule trains on limited tracks. > > Astronomy could have needed synchronization earlier, but the trains > drove it as they grew in number. > > Any other early needs for synchronization? Longitude is a separate > problem, one of traveling clocks. > > Bill Hawkins > > > -----Original Message----- > From: Arnold Tibus > Sent: Wednesday, March 18, 2009 9:39 AM > > Searching the WWW I struggled about > the expression "Railway Time" and found some very nice bloggs. > > http://wwp.greenwichmeantime.com/info/railway.htm > > Occasional Train Blogging: Central European Time: > http://www.eurotrib.com/story/2007/1/29/183327/233 > > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
