Billions of people use quartz every day, but few realize it because the tiny crystals they use are hidden in their watches and clocks. But what do the clear or whitish crystal rocks found all over ...

IT is probable that in the field of use of quartz ... clock to one part in 10 11 for the best clock. Recent tests have shown that the frequency-change or ‘ageing’ can be reduced by using the ...

as in pendulum clocks, or elasticity, as in quartz crystal oscillators. In a monograph by A. L. Loomis and W. A. Marrison on precision clocks, published in the Transactions of the American ...