Electroscope rvfm 52 2681 this value for money electroscope consists of a metal case with ground glass front and rear windows containing a metal plate with an attached special metal leaf supported by an insulated bush the case is provided with a 4mm earthing socket an internal transparent scale divided 0 to 90 x 10 degrees is provided for measuring the deflection of the leaf interchangeable electrodes are provided as well as a 50mm disc top plate and 25mm metal ball to show that charge wi