In recent tests carried out in U.S.A. it had been found that radio waves interfere with racing pigeons. In the ordinary way the carrier pigeon rises in spirals to gain altitude, then heads for home. But when radio waves are transmitted in six megacycles, the birds flutter about in a confused manner. Under such conditions, it was found that birds took as long as fiftytwo minutes to return home from a distance of ten miles, which, without radio interference, would have taken a Quarter of an hour.
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https://paperspast.natlib.govt.nz/newspapers/WT19390921.2.116.1
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Waikato Times, Volume 125, Issue 20915, 21 September 1939, Page 9
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87Page 9 Advertisements Column 1 Waikato Times, Volume 125, Issue 20915, 21 September 1939, Page 9
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