Displaying core states

From: John Foust <jfoust_at_threedee.com>
Date: Thu Apr 22 13:35:27 1999

At 11:32 AM 4/22/99 -0700, Chuck McManis wrote:
>Somewhere in my boxes of stuff I've got one of the tape "visualizer" cards.
>Its looks like a translucent grey plastic card and when you hold it over a
>magnetized surface it shows the magnetic "spots" by turning white (what it

There's also the $9-$20 "Magnadoodle" technology available in the toy
section of almost any store that flips from white to black after
having been exposed to a magnetic pole. I thought you had kids. :-)

- John
Received on Thu Apr 22 1999 - 13:35:27 BST

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