ELECTRIC WHIRL 1572
For demonstrating the effect of Electric discharge from points. The apparatus has 60mm dia six pointed star wheel with all the points curved in one direction. The wheel rotates freely on a Pivot point mounted on a short stand and the stand is provided with a 4mm connection socket on the round base.

WORCESTER CURRENT BALANCE KIT (½ Nuffield Kit) 1574
For use with Worcester circuit board to provide a simple method of teaching students how to build and calibrate a current measuring device. Each current balance consists, when assembled, of a coil which when conducting acts on a small magnet attached to the end of a drinking straw pointer with a needle pivot on an aluminium channel support. Indication is made on a vertical wood strip positioned by a wood block and an elastic band and zeroing is effected using wire riders. KIT COMPRISES: 100 Drinking straws, 8 Alcomax magnets, 4 Wood bases carrying coil, channel and terminals, 1 Pack 18 needles, 4 Wood blocks, 10 Wood strips, Supply of elastic bands , 55g Reel of tinned copper wire, 4m Reel of l6mm self adhesive cellulose tape and 1 set Instructions

WIMSHURST MACHINE 1580
Comprises two perspex sheet plates of dia 300mm rotating in opposite directions by two wheels operated by a handle provided on one wheel. Plates and wheels are supported on cast alloy metal stands fitted on a polished wooden base. Phosphors bronze brushes on friction with pure tin foils pasted on plates generate the static electricity which is stored in two glass Leyden jars supported by an insulated bar. The static electricity produce a spark of 75mm length between two metal bobs supported on two metal rods with ebonite handles. The distance of the metal bobs can be adjusted.

VAN DE GRAFF GENERATOR (MOTOR DRIVEN) 1582
Intended for all the usual electrostatic experiments, but especially where continuous production of a high voltage is required. They have Perspex insulating components, rubber belt, polished metal dome and a separate discharging sphere. The low voltage powered model is designed for operation on a 3 to 5V D.C. supply, capable of providing a current of 1.5A. Power input is via a pair of colour coded 4mm sockets. Mains operated versions are provided with 1.5m of three core mains cable, the earth core of the mains lead being connected to the metal structure of the apparatus. Both low voltage and mains versions also have independent 4mm earth sockets.
GENERAL SPECIFICATION: Charge collecting belt flexible rubber charge collecting combs aluminium mesh, aluminium dome of 175mm diameter, removable Connections 4mm sockets in dome and base Voltage developed up to 200KV, depending upon ambient conditions, with a spark length of up to 75mm Discharger spherical, 75mm diameter, mounted on a rod for holding in the hand or support by a laboratory stand and boss. The end of the rod is drilled to take a 4mm plug. Size: 350x190x480mm high.

VAN DE GRAFF GENERATOR (HAND DRIVEN) 1583
As above but hand driven and self-exciting, mounted on a wood base. The discharge sphere is supported on a pivoted arm with a handle, and is attached to the top of the driving-wheel pillar. For connecting accessories, a 4mm socket is provided at the top of the large sphere, and a 4mm earth socket is drilled in the handwheel pillar base. Sparks in excess of 50mm in length are easily obtained at a slow rate of turning (200 rev/min) and the apparatus is tolerant of moisture and dust.
SPECIFICATION: Diameter of Dome 175mm. Diameter of discharge sphere 75mm. Overall dimensions 50x190x480mm.