Electrostatic Friction Rod Kit, includes: -3 fabric cloths (wool, cotton, silk) -3 rods (glass, ebonite, lucite), provides the necessary tools to free both positive and negative charges for exploration into electrostatic forces, 0.4 lbs, 9.8x6.0x1.8in
Magnetic Map Compass, Size: 2-1/2inx5-1/2in (60x140mm), for overhead projection, Compact 2in (50mm) diameter compass is graduated from 0 deg to 360 deg in 2 deg increments, has a liquid-filled capsule. For reading of topographical and tourist maps.
Neodymium disk magnet, Grade 35, Diameter: 0.5 inch, Thickness: 0.25 inches, Weight: 0.013 Lbs, are made from the most powerful magnetic material in the world, are composed of neodymium, iron, boron and a few transition met
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