The performance of the modern watch depends on the uniformity of the period of oscillation of the balance i.e., the regularity of its movement.
After dinner, we watched the performances of The Washington Ballet (TWB) that Septime Webre, TWB's Artistic Director, had put together for us.
Notable among them was the late George Daniels, the inventor of the coaxial escapement in the 1970s, a mechanism that improved the performance of mechanical watches by virtually eliminating the need for lubrication.
On Culture Desk, Michael Schulman wrote about watching the Obamas watch a performance of the show.
"Our holy grail is to come as close as possible, with a mechanical timepiece, to the performance of an electronic watch," he said.
To watch Pia's Wednesday performance of "River Deep, Mountain High," watch below.
Niggas in Paris became the signature of the pair's team-up, its repeated performances becoming a theme of their performances together on the Watch the Throne tour.
But he may ignite a noisy confirmation fight with Senate Democrats that could reopen questions about the performance of the C.I.A. on Mr. Bush's watch.
Part of him wants to watch every performance of the eight-week run, so it's probably just as well that, a week after press night, he is travelling to Kinshasa with Chiwetel Ejiofor on a research trip for his next theatre production: A Season in the Congo, in which Ejiofor stars as the Congo independence leader Patrice Lumumba, who was assassinated in 1961.
