Large Needle Electroscope, 1.5lbs, 7.0x6.0x4.0 in, ideal for classroom demonstrations of electrostatic principles, A light-weight metal vane, used as a pointer in the electroscope. A transparent scale, provided to measure the angle of the deflection
Magnetic Field Chamber Height: 4.75in Tall, Od: 3.25in, Idr: 0.75in, Magnet Not Included, Great For The Classroom. Extremely Useful For Students To Visualize Magnetic Fields In Three Dimensions, Instead Of The Usual Two Dimensional Of Most Iron Filings Field Visualizers
Basic Magnetic Field Chamber - 3.625in By 2.3125in Diameter, Dimensions: Height: 3.625in, Outside Diameter: 2.3125in,Inside Diameter: 0.625in, Magnet Is Included, Insert A Bar Magnet, Up To Three-Quarters Of An Inch In Diameter