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Re: air blowing out of an old mine



On Mon, 14 Sep 1998, Chuck Britton wrote:

lower entrance and 'out' at the upper end. Perhaps it is related to prairie
dog tunnel ventilation?? I seem to remember a SciAm article on such within
the last 30 - 40 years. ;-)

Try SciAm August 1978 p.128

Angus Cameron