On Sunday, Jul 6, 2003, at 11:25 US/Eastern, John Clement wrote:
> . . . The other problem that I see is that my bar magnets are very
> weak, but with the disk magnets it is harder to see where the
> poles are located. Also my bar magnets already have labels N
> on one end.
I did not remember trying this but attaching disk magnets to
soft iron rods, or to weak bar magnets, will produce stronger
"bar magnets." I would try this today if I were in school.
Ludwik Kowalski