> It seems to me that there would be more gravitational pull on the cold
> dense air than upon the less-dense warm vapor, thus resulting in better
> displacement of the hive air when it's cold.
>

Whatever, it still comes out the front on a clod morning but goes up fine
during the day. So it is worse when it is cold.

I started to try and figure out what is causing it and gave up. There are
several mechanisms but based on John's trials, displacement seems to be the
issue so it would be easier to displace warm air than cold. Density fits
there.

Bill Truesdell
Bath, Maine

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