>Where can I get more info about this?
>

           __________           ______
           \        /          /      \
            \      /    | |   /        \
             ------     | |   ----------
                        | |
                        | |
                         |
                         |
                         ~
                         |
                         |
                         o       TOP VIEW



                        ( )
                         |
            _________    |     _________
           | |     | |   |    |         |    FRONT VIEW
            ---------    |     ---------


(Struggling with limitations of ASCII art.)
Wedge shaped magnets are from an old disc drive. Suspended magnet is Alnico
cylinder. Polarity of far end of cylinder must be opposite to polarity of
upper faces of wedge magnets. Wire tether is shown abbreviated. Mine is a
piece of music wire about a foot long. Its function is to counter the force
tending to push the magnet toward the bottom of the diagram (TOP VIEW).

The sides of the magnetic well are quite shallow. Once you get this set up
it's very stable.

The device that Russell described uses the same principle, but instead of a
tether, the suspended magnet is forced against a glass plate. It has a
point at that end to act as a bearing. Thus it can be made to spin around
its horizontal axis. I have one of those, too, but I think this one is more
interesting.

Reg Neale