FRICTION RODS 1551

(a)	EBONITE	Length approx. 300mm and dia l2mm
(b)	GLASS	Length approx. 300mm and dia l2mm
(c)	POLYTHENE	Length approx. 300mm and dia l2mm
(d)	PERSPEX (Polished)	Length approx. 300mm and dia l2mm
(e)	NYLON	Length approx. 300mm and dia l2mm
(f)	COMPOUND (Half glass half brass)	Length approx. 300mm and dia l2mm
(g)	COMPOUND (Half glass half ebonite)	Length approx. 300mm and dia l2mm

EBONITE SILK RUBBING CLOTH 1552-a
Dimensions: 300mm square.

WOOLLEN RUBBING CLOTH 1552-b
Very suitable for use with polythene, cellulose and Perspex. Dimensions: 300mm square.

FLANNEL RUBBING CLOTH 1552-c
For producing charges on the insulating rods and strips. Dimensions : 300 mm square.

RUBBER SILK 1552-d
Square, size 30X30 cms. approx.

ELECTROSCOPE GOLD LEAF 1558
Rectangular metal case and polythene insulated lid provided with finger flaps to facilitate removal, case fitted with 4mm earthing socket. Front glass window slides up to allow insertion of ionising material into chamber. Size: 85x70x135mm complete with a brass plated top disc.

GOLD LEAVES 1559
Spare for Gold Leaf Electroscope, Pack of 6.

ELECTROPHOROUS 1560
A plastic disc 16 cm diameter in wooden base, a brass nickel plated 100 mm dia plate with ebonite handle & a small brass contact sphere.

BIOTS APPARATUS 1561
With insulated handles 50 mm wide; can be used in conjunction with the hollow conductor sphere for showing that an electrostatic charge resides on the outer surface of the conductor (by removing the outer surface & leaving the inner surface uncharged). Complete with spherical conductor on insulated stand with tripod base.

SPHERE CONDUCTOR 1562
Made of brass nickel plated, mounted on insulated Stand with metal tripod base, with an opening 5cm dia at top.

CONICAL CONDUCTOR 1563
Made of brass nickel plated. Size: l00x50mm length x dia. Mounted on insulated metal stand with tripod base.

CYLINDRICAL CONDUCTOR 1564
Made of brass nickel plated. Size:125x50mm length x dia. Mounted on insulated metal stand with tripod base.

ELECTRIC FIELD APPARATUS 1567
Comprises a shallow glass dish 100 x10 mm; dia x depth, placed on a transparent acrylic plate, size:150x150mm with four pillars to hold the dish and a pair of socket terminals/electrode holders which clip on to its rim. A compliment of six electrodes is supplied, two point source, two line source and two circular rings of 70mm and 35mm dia.

ELECTROSTATIC KIT 1568
A comprehensive kit to investigate several aspects of electrostatic forces. The kit comprises: 1 Electroscope, 1 Rubber cloth, 4 metallised polystyrene spheres, 1 Plated wire hook, 1 Reel nylon monofilament, 1 Electrophorus plate on insulating handle, 1 Cellulose acetate strip, 1 Polythene strip, 1 Proof plane on insulating handle, 1 Wire stirrup to support above two items, 2 Polythene tiles and 2 aluminium cans.

AEPINUS CONDENSER 1570
Comprising two metal discs, each 75mm with variable separation, supported on insulating pillars and provided with insulating handles on the ends of the adjustment slide rods, 4mm sockets are drilled in the end of the adjustment rods. A rectangular glass plate is supplied which mounts in clips between the two discs and may be easily replaced by a plate of some other material to show the effect of different dielectrics. The whole is mounted on a polished wooden base. Overall dimensions: 225 x 150 x 175 mm.

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.

VAN DE GRAFF GENERATOR ACCESSORIES 1584
(a) Head of hair
(b) Brush of artificial hairs may be fixed in 4mm socket on top of upper dome of generator
(c) Faraday Pail
(d) Neon Bulb
(e) Vibrating Column to stimulate ions in motion in transparent plastic container and one spare Belt.

METAL PLATES PAIR 1586
For use with EHT supply or Van De Graff generators to form a simple parallel plate capacitor to investigate charges on ions. Nickel-plated brass disc, 125mm diameter, mounted on insulating plastic rod, 180 x10 mm with 4mm diameter metal contact pin.

ELECTROSCOPE, PITH BALL 1587
A plated brass pillar mounted on bakelite base supporting two pith balls in unspun silk.

PITH BALL, SPARE 1587-a
For Electroscope, assorted sizes, Pack of 10.

FARADAY’S PAILS 1588
Set consists of 4 nesting aluminium cylinderical containers each fitted with insulating feet. Sizes for each vessel are 150mm. dia. x 120mm high, 120mm. dia. x 110mm. high, 90mm. dia. x 90mm. high, 75mm. dia. x 75mm. high.

LEYDEN JAR 1589
Glass vessel, with removable metal internal and external coatings. Maximum height X diameter 10X7cm. Inner metal coating in form of inverted cup to which a rod is fixed.

ELECTROPHORUS 1591
Bakelite disc, 150mm. diameter, in wooden base, brass NP plate of 100mm. diameter, with ebonite handle and small brass contact sphere.

PROOF PLANE 1593
Consisting of an ebonite rod with brass disc of 50 mm. dia.

PROOF PLANE 1593-a
Plated brass disc 25 mm. dia. mounted on a metal shaft and fitted to a 6 mm. insulating handle Overall length: 150ms.

DISCHARGER 1594
Jointed, small plated brass sphered mounted on curved arms, with ebonite insulating handle. Overall length 30 cm. approx. A as above, overall length 20 cm. approx.

BUTTERFLY NET, FARADAY 1596
To show that electrical charge resides on external surfaces of a conductor. Fabric net with cord on insulating pillar with metal base.