THE PERFECT CLOCK
Sir Harold Spencer Jones the Astronomer-Royal,, has spoken of a quartz crystal clock which keeps time to within one-thousandth of a second a day. This is the most accurate type of clock yet invented. It is so precise that it can check the. rotation of the earth, which is Nature’s timekeeper, though not always accurate. In fact, in a recent period of fifty years the earth’s rotation varied by as much as four or five hundredths of a second. Since 1918, however, it has been keeping better time, but should it ever vary again the quartz crystal clock would reveal the fact.
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Bay of Plenty Beacon, Volume 14, Issue 6, 1 July 1949, Page 5
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105THE PERFECT CLOCK Bay of Plenty Beacon, Volume 14, Issue 6, 1 July 1949, Page 5
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