[time-nuts] Visiting Greenwich

Jim Harman j99harman at gmail.com
Wed Jul 6 22:03:07 EDT 2016

Those in Australia might want to check out the traveling "ships, clocks,
and stars" exhibit at the Australian National Maritime Museum in Sydney
through Oct 30. I saw this earlier this year when it was in Mystic
Connecticut and found it very interesting. It is also appropriate for non
Time Nuts. It presents a good overview of the quest for longitude at sea
and features beautiful working replicas of Harrison's clocks.

On Wed, Jul 6, 2016, 7:46 PM Morris Odell <vilgotch at bigpond.net.au> wrote:

> This is a terrific thread. I have been to Greenwich too and also some of
> the
> clock exhibits in London. There's a beautiful pendulum master and slave
> clock set up in the British Museum, and there's an original huge Caesium
> (British spelling!)  frequency standard in the Kensington Science Museum.
> The last time I was there in 2013 there was also a special feature
> exhibition about Alan Turing and the Bletchley code breakers.  I did pass
> through Bletchley station on the train about 20 years ago when I was in the
> UK but regrettably didn't have the time to stop there. I can recommend the
> climb up the hill at Greenwich to anyone - it's definitely worth the
> effort.
> They didn't allow photography of the Harrison clocks but I did manage to
> sneak one or two before the minder got to me :-)
> I'd love to have a genuine electro-optical speaking clock. There's one in
> the Australian Telecom museum not far from where I live. There's also a
> terrific display of a complete electromechanical telephone exchange
> including a speaking clock in the telecommunications museum in Stockholm
> but
> as I don't speak Swedish I couldn't understand what it was saying.  I've
> just finished making a speaking clock using more modern technology, it uses
> a 30 year old speech synthesizer chip and sounds just like Stephen Hawking.
> Morris
> Melbourne, Australia
> -------------------------------------------------------------------------
>    Date: Wed, 6 Jul 2016 10:42:19 +1000
> From: Jim Palfreyman <jim77742 at gmail.com>
> To: Discussion of precise time and frequency measurement
> <time-nuts at febo.com>
> Subject: Re: [time-nuts] Visiting Greenwich
> Speaking of "speaking clocks" - here's two photos of the ones that used to
> be used in Australia:
> https://en.wikipedia.org/wiki/Speaking_clock#Australia
> The top photo with rotating optical disks is a gorgeous piece of machinery.
> The one below - I have one, and I keep it running.
> :-)
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