A spherical conductor on insulating stand with two hollow hemi-spheres, each with insulated handle,to show that electrostatic charge resides on outer surface.

Plated brass,each conductor on insulated stand

Polished, 300 x 13 mm length x diam.

On stand, with insulated base

Comprising one electroscope, one packet of metal leaves, 4 metallised spheres, 1 reel of nylon thread,two polythene plates 75 x 75 mm, one electrophorus plate with insulating handle, 1 proof plane. two aluminium cans, one cellulose acetate strip, 1 polythene strip, one stirrup for suspending strips, one flannel rubber, one wire hook and instructions.

Glass tube 300 x13 mm length x diam. with both ends closed and rounded, for producing electrostatic charge by rubbing.

Rectangular case and polythene insulated lid with finger flap to facilitate removal. Case fitted with 4mm. earthing socket is tapped in base to take support rod. Front glass window slides up to allow insertion of ionising material in chamber and gold leaf support plate and aluminium scale with 6 radial notches of 10^o are provided, with one pair of leaves.

Aluminium, set of four nesting cylinders, largest of size 125 x 140 mm diam x ht. The smaller pails are fitted with insulated feet.

Hand operated on base. The generator is self exiting and charge separation occurs. A metal sphere surrounds the upper pulley assembly and charge accumulates on the sphere, which is insulated by a plastic column supporting the pulley assembly. The charge builds up untill electrical breakdown of air surrounding the sphere occurs. Supplied with a discharging sphere.

The charge is transferred from generator to the metallic dome, surrounding the upper pulley, with the help of the motor driven rubber belt and two metallic combs. To reach high voltages, the lower portion of the sphere is smoothly inturned.

The machine is fitted on base and other insulating parts are made of perspex, metal dome and the discharge sphere are polished.

Accessory Set

Head of Hair, brush of artificial hair may be fixed in 4 mm socket in top of upper dome of generator - Faraday pail-Neon Bulb-vibrating column to stimulate ions in motion in transparent plastic container and one spare belt.

Motor :

Operates on 220V A.C. 50Hz.

Collecting :

Rubber

Brushes :

Metallic, non injurious to belt

Spheres :

Aluminium 16.5 cm. diameter approx.

Voltage :

250 KV under dust free atmospheric conditions corresponding to a spark discharge of 7 cm.

Earthing :

By earth lead of 3 core mains cable

Discharger :

10 cm. dia. sphere mounted on a metallic rod

The two plates are supported in two rigid uprights and driven by belt in opposite direction. They are heavy, high resistance plastic with sectors of aluminium sheet. Two leyden jars (condensers) made from corning glass and aluminium foil. The whole is mounted on a wooden base nicely polished.

For use as insulators. Length approximate 30 cm. and 13 mm. dia.

Square, size 30 x 30 cms. approximate.

Square, size 30 x 30 cms. approximate.

A plated brass pillar mounted on bakelite base supporting two pith balls in unspun silk.

The microscope consists of a heavy cast iron base fitted with three levelling screws with the top machined over which slides a gun metal carriage. The slide can be clamped at any position by means of a clamping screw. Fine Adjustments for final reading is done with a micrometer screw. A vertical slide operating in a similar way is fitted on the horizontal carriage. The microscope with rack and pinion is fitted on the vertical or horizontal position of microscope. Microscope tube is fitted with 10x Ramsden Eye Piece with cross line graticule & an Achromatic 2"or 3" focal length objective of high quality. Travels 17 cms horizontally and 14 cms vertically. Guaranteed accurate vernier reading 0.02 or 0.01 mm. With swing out magnifier for reading vernier. Packed in a sturdy wooden box.