>
>You Can't use Mercury as a dialectric in a capacitor, the plates would be
>shorted all the time (good tilt switch).

No, but you can put it in a tube, and use the tube as the dielectric in a
pair of caps in series. You can also put a wire into the tube, and use the
mercury for one electrode, and copper tape on the tube for the other
electrodes of a differential capacitor.

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