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Magnetic Lines of Force Demonstration

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#1257 Magnetic Lines of Force Demonstration      This clear acrylic plate makes understanding the lines of magnetic force much easier for the student because the lines are so visible.  Iron filings float in a layer of oil and orientate themselves according to the magnetic force of any magnet place on top.  Great for overhead projectors.  (Magnet not included).  Size is 7/16" x 4 3/4" x 8 3/4", 292 grams.