Steve Nosko wrote:

Most certainly idle minds will play...

"Richard Clark" wrote:
...You could never support the column within it as it
would draw a vacuum in its collapse under the influence of gravity
(AKA barometer).

OOPS. Tilt... Er...uh. Don't build it like that.

"Tilt" is very good advice for a variable mercury column.
In fact, the tuning length of the column of mercury could
be controlled simply by tilting the tube of mercury at an
angle away from vertical in the direction of horizontal.
--
73, Cecil http://www.qsl.net/w5dxp



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