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true what you say Tas.
I remember reading that tidbit of info before I made the block.
IIRC they are called "Trapped Vortices"
nice to know someone else is on the same page as me.
S.
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When you are courting a nice girl an hour seems like a second. When you sit on a red-hot cinder a second seems like an hour. That's relativity.
Albert Einstein
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