Specific Gravity Metal Cylinder Set Copper, Zinc, Aluminium And Steel, Four Different Metal Cylinders Each Measuring 38 mm Long X 10 mm In Diameter, Made Of Aluminium, Zinc, Copper And Steel.
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
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