1257 Magnetic Lines of Force Viewer
The clear visibility of this unit makes understanding lines of magnetic force much easier to demonstrate. The iron filings float in a layer of oil encased in an acrylic plate and orient themselves according to the magnetic force of any magnet placed under the apparatus. Perfect for use on overhead projectors. Magnet not included; 7/16" x 4-3/4" x 8-3/4"
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