THE 30,000-YEAR CLOCK
The inventor of the "30,000-yecr clock" is Lord Rayleigh. Exactly how long the apparatus would continue to function is unoertain, but as it depended for its motive power on the radio-active properties of radium there is no doubt that, assuming the containing receptaoles and accessories persisted, it would last for several thousand years. The radium used amounts to about one five-thousandth part of an ounce, and the movement of the strips of aluminium takes place . once every minute, and though the apparatus can hardly te called a clock, it could be made to ring a bell once a minute, and might be developed into a marketable timetrieee-^if radium were plentiful and cheap enough.
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Bibliographic details
Evening Post, Volume CIV, Issue 49, 26 August 1922, Page 19
Word Count
116THE 30,000-YEAR CLOCK Evening Post, Volume CIV, Issue 49, 26 August 1922, Page 19
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