On Tue, Sep 4, 2012 at 8:43 PM, Jouni Valkonen <[email protected]> wrote:

> Terry quite clearly stated that permanent magnets do wear down quite fast,

Terry said magnets in opposition degrade.  Magnets in attraction will
not degrade over time.

A magnet struck repeatedly by a hammer will degrade due to the
randomization of magnetic domains due to the shock.  Magnets in
opposition suffer a similar shock.

T

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