Atom Clock Betters Greenwich Accuracy
Owing to its accuracy, the atom clock at Washington, U.S.A., will probably be substituted for the time keeping apparatus at Greenwich, said Sir Harold Spencer Jones, the Astronomer Royal, lecturing at Los Angeles, ■. Sir Harold spoke rather coldly of the famous quartz crystal clocks at Greenwich which, he complained, “are accurately only to about one thousandth of a second a day. Only!
Turning warmly to the clock developed by the Bureau of Standards in Washington, he continued: “The American atomic clock, governed by vibrations of ammonia molecules, seems to be an almost absolute measure of time.”
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Bay of Plenty Beacon, Volume 14, Issue 29, 24 August 1949, Page 8
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101Atom Clock Betters Greenwich Accuracy Bay of Plenty Beacon, Volume 14, Issue 29, 24 August 1949, Page 8
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