"Ian Iveson" wrote


You could always heat them up and hold them at an angle of 71 deg
pointing North and then hit them smartly wiv a hammer - it would make
them very slightly 'magnetic'....

Worked with Miller and some Lucas dynamos, sometimes, reputedly :-)

It must take a while for the heat to escape. How do they know when it's
done?

How do they avoid cracking the glass or the metal, or weakening the joints
between dissimilar materials?

There seems to be common in the claims something about relieving "internal
stresses", whatever that means. It may be plausible...I forget if I ever
knew anything about metal at low temperatures...presumably crystals can be
unformed by making them either very big or very small.

Perhaps it is the equivalent of work hardening, where discontinuities are
squeezed out of crystal boundaries?

Perhaps that then effects the way that perveance-enhancing constituents of
the cathode alloy migrate to the surface?


I'm not qualified to comment, but I will say that, in general, I *believe*
the opposite - the appropriate application of heat allows change in solid
objects, the application of extreme cold prevents it.....