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A second in one-hundred days – the results

The last time I wrote about Clock B, we had just commenced an official 100-day trial to see if it would keep up with John Harrison’s expectations. In the last blog post the conditions and aims of the trial were outlined. In this post I will add a little detail…

Thomas Earnshaw’s troublesome chronometer

As Ships, Clocks & Stars makes its way round the world, there’s still time to look at the stories behind some of the objects in the exhibition. If you go see it now at the Folger Shakespeare Library, one of the objects you may come across is chronometer number 512,…

Happy Birthday Mr Harrison

Today (3 April) marks the 322nd birthday of Mr John Harrison. To celebrate, the very talented Emily Churchill from the RMG Photo Studio baked a special cake, commemorating one of Harrison’s greatest achievements, his H4 seawatch (and very delicious it was too!). In 1726 John Harrison, a carpenter and clock-maker, learned…

Where should you put your meridian?

With Ships, Clocks & Stars: The Quest for Longitude now showing at the Folger Shakespeare Library in Washington DC until August, it’s high time I mentioned one of the objects we had on show in Greenwich, but which is now back in store. It’s rather revealing of the problem of…