Intentionally rusting metal...
"Martin H. Eastburn" wrote in message
...
Harold -
If you have one - try a polarizing type filter - as xtals have axis.
Might show up.
Martin
Sadly, the only microscope I have isn't proper for such use, and I have no
filters for it, anyway. Sure would be interesting to solve the
riddle----these parts should have rusted long ago.
Harold
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