Barlow’s Wheel

For demonstrating the conversion of electric energy into mechanical energy. Comprises a toothed copper disc about 9cm diameter, capable of rotating vertically on pair of adjustable bearings at its each side. The disc dips into mercury trough positioned between the two arms of a small horseshoe magnet. Disc holding clamp is adjustable vertically on metal support rod, which is connected to a termil for electrical connections. Other termil provided for connecting to the mercury trough. With the height of disc properly adjusted, the pointed teeth of disc dips just enough to make electrical contact with the mercury and experiences a force when current flows through it. The apparatus operates on 4-6volts. Supplied without battery.