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On Tue, 4 May 1999, Roger Haar wrote:
I have an odd problem with a mercury barometer. It
reads too large of an atomospheric pressure. Here at the U
of AZ the Atmospheric Science Dept has two nearby stations
from which I can get readings. These report something like
27.2 inches ( NOT corrected to sea level) and I get 29.5
inches.
Roger,
Apparently you've successfully created an "ultravacuum." We all know
that the "vacuum ain't nothin'" these days. Most likely you have simply
managed to reduce the level of vacuum fluctuations in the region
above your mercury column a la the Casimir force. I say, publish before
the effect perishes.If it really is an ultra vacuum, please send me a few micropascals of it
John