STACKING PLUGS 1708
4mm, with screw connection for leads, longitudinal and transverse 4mm holes for extra plug connections. Hard plastic insulating body. Colour: (a) Red, (b) Black, (c) Yellow.

CROCODILE CLIP 1709
With strong spring and clamping screw for wire.

MAGNETIC EFFECT DEFLECTION 1710
Running cathode rays are visible to naked eye by the glowing path on fluorescent screen. When a magnet is brought near, the deflecting path cathode rays are vividly visible. Supplied without magnet

HEATING EFFECT WAX COATING 1711
When cathode rays are focused on wax coated on the outside of the upper round head of cathode ray tube, the wax melts quickly showing heat generated by cathode rays.

PLUG LEADS 1712
4mm plugs connected by a length of flexible, plastic insulated copper wire. The plugs are stackable. Colour: Red, Black, and Yellow.
Length: (a) 300mm, (b) 500mm, (c) l00mm.

GEISSLER'S TUBES DEMONSTRATION 1713
Different shapes and degree of vacuum inside showing different discharge phenomenon, illuminations, patterns etc. Tube ends provided with caps for connection to induction coil. Set of 6 tubes.

GEISSLER'S TUBE 1714
For use with electronic machine or induction coil, with vacuum regulating device. Comprises a glass sphere with a concave disc electrode generating cathode rays and focusing on a tungsten target, placed at an angle of 45° at the inner end of arm exactly opposite. These tubes produced soft X-Rays and care must be taken from over exposure. Available in following diameters: A). 80 mm , B) 90 mm, C) 110 mm.

SPECTRUM TUBES 1715
20 cm long straight form, with side electrodes and 50 mm long fine capillary in the middle. Filled with Oxygen, Neon, Helium, Air Nitrogen, Argon, Ammonia Vapours, Alcohal Vapours, Carbon Dioxide, Hydrogen, Iodine vapour, sulpher water vapours.

RECTILINEAR PROPAGATION 1716
V Shaped tube. To show cathode rays are generated only vertical (lower electrode) irrespective of the anode points (any of two electrodes above).

REPULSION TUBE GOLD STEIN'S 1717
Vertical tube with two parallel wire cathode at two ends of tubes with third electrode to serve as anode. Mounted on base.

SHADOW EFFECT ELECTROMAGNET 1718
An object obstructing cathode rays casts its shadow on the fluorescent wall facing it, and if the running cathode rays are subjected to magnetic effects, per an electromagnet, the shadow is affected by its slight rotation change. Complete with electromagnet.

REPULSION TUBE GOLD STEIN'S 1719
Vertical tube with two parallel wire cathode at two ends of tubes with third electrode to serve as anode. Mounted on base.

FLASH LAMP BULBS 1720
With M.E.S. cap, suitable for flash-lamps, sport lights and panel lamps etc. Supplied in packs of ten. Volts:
(a) 1.5 V, (b) 3.0 V, (c) 4.5 V, (d) 6.0 V

FLASH LAMP 1721
2.5 Volts mounted in M.E.S. holder fitted in clear plastic jar of 55 x110mm with two 4mm sockets on top.

SHADOW EFFECT MALTESE CROSS OR CROSS & SHADOW 1722
An object (star) obstructing the path of cathode rays casts is shadow on the fluorescent painted wall facing cathode rays.

HEATING EFFECT PLATINUM FOIL 1723
Upon focusing at a point, cathode rays generate intense heat shown by the red heating of platinum foil.

CARBON ARC LAMP 1724
Mounted on wooden base to explain working of arc lamp operates on 12 volts A.C./D.C.

LAMP HOLDER M.E.S. 1725
To take flash lamp bulbs, moulded plastic base with two screw connections.

LAMP HOLDERS, MOUNTED 1726
S.B.C. double contact brass lamp holder mounted on rectangular base, with two 4mm socket connections. Dimensions: 100 x 60 x 60mm high.

WORCESTER CIRCUIT BOARD 1730
Consists of a base-board, complete with terminals, a set of metal connection pillars and a number of clips on flexible connection strips and accessory units, enabling a wide variety of electrical circuits to be constructed quickly and easily. The phosphor-bronze strips are so designed that when flexed a little in the fingers, they are easily slipped over the pegs where their natural spring holds them firmly in position and ensures a good electrical contact. The following components are supplied with each board. 20 Flash lamp bulbs,1.25V 0.25A, 9 connectors with lamp holder, 12 Plain connectors, 1 Connector with rheostat, 1 Rectifier, 1 Resistor, 2 Flexible leads with 4 mm plug and crocodile clip, 2 Flexible leads with crocodile clips, 2 Crocodile clips, 2 Mounted bell pushes, 2 Soft iron nails, 50 mm, square head, 1 Length bare copper wire 20 SWG, 1 Length plastic covered copper wire 26 swg, 1 Plastic disc drilled, 4 Pencil leads, 1 Piece copper foil, 1 Piece steel wool. The standard pack is one complete set as detailed above. sufficient for two students.

WATER CIRCUIT BOARD 1732
It consists of a large board on which is mounted a low-voltage electric pump, connected to 4 mm socket terminals, which circulates the water through the circuit. The circuit is of clear plastic tubing connected to glass tubes of differing bores representing resistances. Across the resistance is connected a detachable manometer to show the potential difference. Following the resistance is a taper-ended tube discharging into a funnel so that the rate of flow representing the current may be shown. Dimensions: Board 590 x 320mm approx., Manometer 275 x 115mm approx.

BICYCLE DYNAMO ASSEMBLY 1733
For showing slow A.C. on an oscilloscope or meter or for demonstrating the use of a dynamo mounted in lighting a lamp. This apparatus has a cycle dynamo mounted on a base and provided with two sets of gears driven by a hand crank for fast and slow rotation. Two 4 mm socket terminals are provided for the dynamo output, connected in parallel with an M.E.S. lamp holder and 2.5 V bulb Dimensions 220 x 115 x 105 mm high

ELECTRIC MOTOR KIT, WESTMINSTER TYPE 1734
The kit comprises all the part required to build 6 model motors as in the electromagnetic kit. Each kit contains:
- 12 pieces of magnets;
- 6 pieces of armatures;
- 6 pieces of mild steel yokes;
- 6 pieces of support bases;
- 6 pieces of shaft;
- 24 pieces of rivets;
- 12 pieces of split pins;
- 1 reel of 26 SWG PVC tinned copper wire;
- 2 reels of cellotape;
- 300mm rubber tubing;
- 3mm bore

DEMONSTRATION ELECTRIC MOTOR 1735
A completely open construction model of motor. The field is provided by a Permanent magnet armature wound by enameled copper wire provided with a commutator and Phosphor bronze brushes for supply of current to the armature from two 4mm socket terminal. The motor operates on 4.5 to 9 Volts DC.

TELEGRAPH SET, LECTURE PATTERN 1736
Set of TWO units working model, each unit is mounted on wooden polished vertical stand, all connections are clearly visible to explain the principle of telegraph. Each unit is workable on 4-6 volts D.C.

BELL DEMONSTRATION MODEL 1737
All the components of an electric bell are mounted on a large panel. All wiring is visible and parts are of large size. Operates on 3-4 volts D.C.

ELECTRIC MOTOR WITH NEWTON’S DISC 1738
Mounted on a wooden base 90 x 90 x 100mm, length x width x overall height. A three pole armature wound with enameled copper wire provided with phosphors bronze brushes to carry the current from two 4mm socket terminals working on 3 to 6 Volts.