Demonstration Meter Demonstration of the constructional features of permanent magnet moving coil type meters. Movement with spring control and magnetic damping Housed in a tough plastic frame with transparent front and back windows. Accuracy ± 2.5%. Basic sensitivity calibrated at 5mA, 100mV FSD Useful for demonstrating the working principle of AC or DC ammeters, voltmeters and galvanometers. Interchangeable plastic scales are available separately.

Electroscope Pith Ball A plated brass pillar mounted on bakelite base supporting two pith balls in un-spun silk.

Whimshurst Machine With two plastic plates, each carries aluminum foil segments. Maximum spark length 75mm. The neutralizing bars are provided. The collecting brushes are carried on a large insulating beam. A pair of high capacity lyden jars are incorporated, which may be connected or disconnected as required.

Gold Leaf Electroscope A metal plate on which a single gold leaf supported by an insulating bush in a metal case with a 4mm socket earthing terminal. The front window is clear & the rear window is of ground glass mounted upon a base & two interchangeable electrodes are supplied. One being a traditional disc top plate. while the other is in the form of a metal hook.

Kinetic Theory Model The apparatus consists of a clear perspex tube outer diameter provided with a light, freely sliding expanded polystyrene piston & a loose fitting metal cap. The tube is mounted by means of a bayonet type fitting in a cap, upon a housing. A low voltage DC motor is contained in the housing & is coupled to crank driven agitator. The push rod of the agitator carries a light plastic piston, which oscillates in the lower end of the tube. The apparatus is supplied complete with metal spheres & four cardboard loading discs.