This object was a magnet to test iron ore quality. This permanent horseshoe magnet is seven layers. Horseshoe magnets would dip into a trough of finely crushed crude ore with the good ore attaching to the magnet and lifting up.
This object was a magnet to test iron ore quality. This permanent horseshoe magnet is seven layers. Horseshoe magnets would dip into a trough of finely crushed crude ore with the good ore attaching to the magnet and lifting up.