Archaeologists use Ground Penetrating Radar to find things buried beneath
the ground, walls, graves, fire pits, etc.  They might be able to help
you find a time capsul buried inside a corner stone.
Also, in the Department of Geosciences at my university, they are using
Refliction Seismology to find features in the ground.  They might be able
to help.
Reflection seismology is very similar to Ground Penetrating Radar, it is
recorded in a different time scale (different frequency)
Perhaps a geologist with this technology would be able to help.


Heidi Anderson
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On Fri, 15 Mar 1996, Dan Freidus wrote:

> The field that has the best  funding for developing methods to find
> hidden objects is medicine.  I'd call a radiology dept of a med school.
> Ultrasound might be able to find the hole in the stone.  X-rays or such
> would require access to both sides and I assume that's difficult with a
> corner stone.  You might also contact an archaeologist,  they do have
> some sort of 'radar' which may also be ultrasound.
>    Good luck,
>    Dan Freidus
>    [log in to unmask]
>