   50 pound weight. 
This is a 50 pound cast iron weight intended for a large pan balance, or possibly as a calibration weight.  It came from the liquidation auction of an Amish welding operation near Arthur Illinois.  As a sample of iron it's ideal because it's using the element simply for the that fact of its being there, for its weight. 
I wrote a story about this auction: Click the storybook icon for this sample to read about this quite interesting auction. 
Source: Herschberger Welding Auction 
Contributor: Theodore Gray 
Acquired: 14 September, 2003 
Price: $25 
Size: 8" 
Purity: 95%
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