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<p>[QUOTE=&quot;Spark1951, post: 3018533, member: 90692&quot;]Correct me if I&#039;m wrong, but as I understand it...</p><p><br /></p><p>Magnetized iron filings can be used in science experiments.&nbsp; One such experiment puts a magnet on a sheet of paper, sprinkling the filings on the magnet to show the (invisible) lines of magnetic flux belonging to the magnet.</p><p><br /></p><p>You used magnetized iron filings from a child&#039;s toy and sprinkled them over the roll of cents you got while CRH (coin roll hunting).&nbsp; The filings stuck to the side of the roll, indicating a steel core coin was inside.&nbsp; It could have been a Canadian cent but, instead, it turned out to be your posted 1943 steel cent.</p><p><br /></p><p>An example of a great idea!&nbsp; (IMHO)</p><p><br /></p><p>Spark[/QUOTE]</p><p><br /></p>

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