BAR MAGNETS 1501
Made of steel 15 x 5mm in pairs red painted polarity marked with keepers. Size:
(a) 100mm long
(b) 150mm long

CYLINDRICAL MAGNETS 1502
Made of steel 12mm dia in pairs, half red and half blue for N & S. Spray painted with keepers. Size:
(a) 100mm
(b) 150mm

HORSE SHOE MAGNETS 1503
Made of steel, half red and half blue (for N and S) spray painted, with keeper. Sizes in mm:

	Length	Width	Thickness
(a)	50	12	5
(b)	75	12	5
(b)	100	25	6

BAR MAGNETS, ALNICO 1504
Made of cobalt steel, in pairs, half red and half blue painted (for N and S) very strong, with keepers. Sizes in mm:

	Length	Width	Thickness
(a)	50	13	8
(b)	75	15	10
(b)	100	13	8

CYLINDRICAL MAGNETS, ALNICO 1505
Made of cobalt steel, l0mm dia. in pairs, half red and half blue painted, (for N and S) very strong, with keepers. Length in mm:
(a) 50 mm
(b) 75 mm
(c) 100 mm

U-SHAPE MAGNET 1506
Made of special magnetic steel.

U-SHAPE MAGNETS, ALNICO 1507
Made of cobalt steel,12x6 mm, half red arid half blue painted, (for N and S) very strong, with keeper. Length in mm:
(a) 50 mm
(b) 75 mm
(c) 100 mm

IRON FILINGS 1508
Grease-free, fine iron filings packaged in a convenient shaker to allow dispensing without waste. 12 oz package.

DEMOUNTABLE TRANSFORMER 1509
A large-scale transformer, ideal for classroom. The coils are fitted with intermediary outputs providing many transformation ratios. Moreover, one of them has a mains cable so that you do not require an external power supply unit. Consisting of :
A) 1 magnetic circuit made up of highly permeable U-shaped metal sheeting, which can be closed via two clamps with tightening screws.
B) Section 40 x 40 mm. Length 150 mm – Height 170 mm.
C) One coil of 6000 turns, 350 ohms, 1 max: 0.2 A. Intermediary 2000 turns output used
D) One coil of 600 turns, 1 max: 2.5 A. Mainly to create the transformer primary. Provided with power supply cable.
E) One coil of 1200 turns, 12.5 ohms, 1 max: 1.25A fitted with intermediary 400 and 800 turns outputs.
F) One coil of 72turns 1 max: 12A, has intermediary 6, 30 54 and 66 turns outputs.

DISSECTIBLE TRANSFORMER 1509_1
This transformer has been designed primarily for demonstration of the basic principles of the a.c. transformer. The various coils and cores will also serve as the basis of many experiments in electromagnetism, using either direct or alternating current. To this end, the number of turns, the direction of winding and the continuous maximum rated current are marked on each coil. Includes the following componants:
1 Clamp base.
1 laminated ‘U’ core length of side 133mm, base 95mm, section 32 x 25mm.
1 laminated armature 95 x 32 x 25mm.
2 soft iron pole pieces.
1 300-turn 4A coil.
2 600-turn 2A coils.
1 1200-turn 1A coil.
1 3600-turn 0.3A coil, centre tapped.
1 12000-turn 0.05A coil.
1 detailed instruction book.
In the basic transformer set all coils are fitted 4mm socket connection, but 600-, and 1200-, turn coils are available (as accessories) fitted with shielded plugs for connection to the a.c. mains supply. All coils are of enamelled copper wire wound on high impact plastic moulded bobbins 75mm long with cheeks 75x60mm. The robust clamping base is provided with a tommy-bar screw to hold the ‘U’ core, and two knurled nuts to secure the armature and provide for easy changeover of the coils. Soft iron pieces are provided which locate on top of the ‘U’ core arms. One end of each pole piece is flat so that the pole pieces provide a narrow gap with the full cross-sectional area, while the other end is in the form of a truncated cone giving a narrow concentrated field between the poles.

BARLOW WHEEL 1509_2
A star shaped copper disc 90 mm dia rotatable vertically on pair of adjustable centres & dipping into small mercury trough between the vertical limbs of a small horse shoe magnet on a wooden base 150 x 100 mm. The disc adjustable vertically on a metal pillar 75 mm high which is connected to one of the two terminals mounted on the base. The other terminal is connected to the mercury trough. Operates on 4 Volts.

FORCE ON CONDUCTOR IN MAGNETIC FIELD 1509_3
Comprising a strong U-shaped magnet and a pair of brass rails with 4mm socket terminals. A brass axle with plastic discs is free to roll along the rails and completes the electrical contact between them. When the axle is placed on the rails between the poles of the magnet and a power supply unit is connected, the axle is repelled and rolls along the rails away from the center of magnetic field. Dimensions 175x60x58mm high.

MAGNETIZER 1510
Used to revitalize iron, nickle, cobalt, and alnico bar and horseshoe magnets. Simply place magnets in the 1X1” hole and push the beaker switch. Equipped with on/off switch, breaker switch, pilot light and grounded 3-prong plug. Operates on 220V AC. Instructions are screened on the cabinet.

STIRRUP 1511
Made of brass wire for suspension of magnets length 50mm, height 40mm approx.

MAGNETIC NEEDLE 1512
A carbon steel needle with brass bearing well balanced. Size:
(a) 50mm
(b) 75mm
(c) 100mm

NEEDLE STAND 1513
For magnetic needles with bakelite base and aluminium pillar supporting a steel needle pivot. Height 80mm.

PLOTTING COMPASS 1514
In aluminium case.
(a) 12mm dia one side glass
(b) 18mm dia both side glass

MAGNETIC THEORY BOARD 1515
Consists of 20 small ungraduated transparent compasses mounted on a clear plastic base. Compasses are ready to line up with the magnetic field lines of any bar or horseshoe magnet placed on or near the board. This is an alternative to the mess of working with traditional iron filing to demonstrate this principle. Compass can be removed for use in other experiments.

MAGNETIC FORCE ON A CONDUCTOR BALANCE 1516
To demonstrate that when a current is passed through a conductor in a magnetic field, it is subjected to attraction or repulsion dependig upon the direction of current in it. The apparatus consists of a plastic base 160 x 140 mm on which two contact pillars are mounted. Each pillar is provided with an external circuit. A balanced beam is supported by the pillars on two bearings which form the fulcrum. Two screwed masses are provided in the beam system, one moving vertically for the adjustment of sensitivity and the other moving horizontally for the adjustment of the equilibrium position, when no current is flowing. Scale marked 0 to 75 x 1 mm, rider of 1 gm. weight, complete with instructions.

MAGNETIC NEEDLE 1517
Carbon steel with brass cup bearing for pivoting. Length:
(a) 50 mm
(b) 75 mm
(c) 100 mm

MAGNETIC NEEDLE 1517-a
Carbon steel with jewel bearing for pivoting. Length:
(a) 50 mm
(b) 75 mm
(c) 100 mm

POCKET COMPASS 1518
In aluminium case 50mm dia one side glass with a printed card dial marked with degrees.

DIP CIRCLE 1519
An accurately balanced needle fitted with hardened steel pivot working in jewel cup bearings.

DIP NEEDLE 1520
Comprises an aluminium arc printed with degrees 0 to 90 supported in aluminium fork fixed on aluminium base. The fork holding the needle can be rotated on metal base to take the angle of dip.

DEFLECTION MAGNETOMETER 1521
Comprising a bakelite box 100mm dia with aluminium dial marked with degrees 0-90º four times, antiparallax mirror and a steel needle pivot at the centre. The short magnetic needle has a jewel bearing and an aluminium pointer for precise reading on the dial. This magnetometer compass box is fitted at the centre of one metre long wooden board with two half metre scales reading from the centre of the compass box complete.

DEMONSTRATION TRANSFORMER 1522
The primary coil is of 200/250 volts and two interchangeable secondary coils give an output at 6 and 12 volts at 2 Amps. Assembly of the transformer and interchanging of coils can be done quickly. Complete with 2 mt. cord and plug connections.

VIBRATION MAGNETOMETER 1523
A wooden box with two glass doors. A glass tube supported at the centre on top of the box supports a stirrup with a silk thread. The floor of the box has a mirror with an index line supplied with a 100mm bar magnet and al00mm long brass bar of the same size.

ELECTROMAGNET 1524
A soft iron ‘U’ shaped core of circular section fitted with wound with copper wire. The bobbins are connected with connector. The two lose ends of copper wire also have c tors. Supplied with a keeper.

OERSTED’S APPARATUS 1525
To show the action of DC current on a magnetic needle 75mm long supported on a pivot mounted on a wooden/bakelite base and surrounded by a rectangle copper rod fitted with terminals.

IRON FILINGS SPRINKLER/COLLECTOR 1526
Iron filings contained in a clear plastic jar with a spring loaded magnet on which filings sticks and by opening the lid can be sprayed on paper. After experiment just use the magnet to collect them back.

MARNIER'S COMPASS 1527
With aluminium bowl in gimbals and mounted in wooden polished box, slide 20 cm. with sliding lid. Diameter of card 10 cm.

MARNIER'S COMPASS 1528
With aluminium bowl in gimbals and floating dial on aluminium stand.

DEMONSTRATION INDUCTION COILS 1529
With primary coil of thick gauge enameled wire wound on a former 110x30mm dia. Secondary coil of fine gauge enameled copper wire wound on a former 115x50mm dia. Both coils fitted with 4mm sockets supplied with a soft iron core with a handle.

INDUCTION COIL 1530
The primaries are wound with thicker gauge enamelled copper wire on a letherite pipe. The secondries are wound with fine gauge enamelled copper wire providing heavy in solutions on every layer. Further the coils are housed in wooden box on which the coils are fixed. Handles to get the spark are provided. Adjustable trembler break with points and on/off switch and a connector working on 6-12V. Spark length: a) 25mm b) 50mm c) 100mm

INDUCTION COIL (SOLID STATE) 1531
A coil that produces a 3 inch spark. Sliding rods that adjust the spark gap, on-off switch with pilot lamp, polarity reversing switch and power rheostat. Operates on 220V AC.

SOLENOID (Air Core) 1532
Used to study electricity and magnetism. Constructed of 550 turns of 16-gauge enameled copper wire wound on a 150mm PVC Core, which can carry 10Amp. intermittently and 5Amp. continuously. Equipped with brass binding posts mounted on rigid PVC end plates. Sizes:
(a) 38mm ID
(b) 60mm ID

DOUBLE 'C' CORE AND CLIP 1533-a
Laminated core to form roughly rectangular core 92x56x20mm approx. With a cross section of 20 X 12 mm and is cut across the middle to produce two equal C's. A strong spring steel slip is provided to hold the two halves together.

PAIR OF COILS 1533-b
Each centre hole coil is wound oa plastic former and is provided with 4mm socketed terminals. The coil fits on to a double 'C' core, provides a suitable transformer for operation from a low voltage AC supply. In addition it provides a useful electromagnet if used on one half of a 'C' core. Overall size of coil 100 x 53 x 28 mm approx.

	a	b	c
Turns	120	240	2400
Turn Connections	0, 60, 120	0, 1200, 2400	0, 120, 240

MAGNETIC FIELD TABLE 1533-c
A wooden table supports a aluminium ring wound with three coils os 18 s.w.g. enameled copper wire of 5, 10 and 20 turns respectively, connected to bakelite 4mm socket terminals at one edge of the table board. Size: 400x275x90mm high. Outer dia. of coil former 160mm. Overall height of apparatus 170mm.

HELICAL COIL 1533-d
For projection of the magnetic field characteristic of a helical coil of 10 turns on plexiglass.

CIRCULAR COIL 1533-e
For projection of the magnetic field characteristic of a circular coli of 150mm dia plexiglass.

SELF AND MUTUAL INDUCTION COILS 1533-f
Primary 500 turns and Secondary 1000, 2000 & 3000 turns. Wooden bobbin dia. 25 cm.

TANGENT GALVANOMETER 1534-a
A bakelite ring channel 165mm dia with three windings of 2, 50 and 500 turns mounted on a black bakelite plate with four terminals. A nonmagnetic metal cup supports a magnetometer com- pass box at the centre of the ring. The whole unit can be rotated at the centre of a metal tripod provided with three leveling screws. Complete with compass box.

TANGENT GALVANOMETER 1534-b
Consists of an acrylic hoop, approx. 5 inch dia. wrapped with 2 coils of copper wire (1 coil has 5 turns, the other 10) 3 binding posts, which allow connections to 5, 10, or 15 turns, complete along with compass.

SIMPLE GALVANOSCOPE 1534-C
Comprises wooden former with terminals & engraved metal circle marked 0 - 180 - 0, divided & figured every 45º, with magnetic pivot, wound with 30 turns enamelled copper wire & complete with 75 mm magnetic needle with brass bearing. Maximum opening voltage 4.5 V.

BALLISTIC GALVANOMETER 1535
For measurement of small quantities of electrical charge. Reflecting mirror type model. A link high resistance is provided to make the galvanometer periodic. With Leveling screws.

ELECTROMAGNETIC KIT 1536
Comprises 8 anisotropic alloy magnets, 8 anisotropic ceramic ferrite magnets, 4 steel magnet-yokes, 6 plotting compasses,4 hardboard formers for compasses, 1 bottle iron filings, 4 iron filing dispensers, 4 each double C-cores, clip for C-cores, aluminium rings, split aluminum rings, 4 each support bases, armatures with axle-tubes, aluminium axle-rods, 8 split pins, 16 rivets, 1 length latex rubber tubing, 4 each formers for coils, reels cellulose tape, reels copper wire, 4 each sheets white pasteboard, plain postcards, reels white cotton, 4 each carbon resistors 100 ohms, 10 ohms, 10 flash lamp bulbs, 5 neon bulbs, 8 MES bulb holder, wood clamp and wood block.

SPOT GALVANOMETER 1537
Very popular for use as a null detector for potentiometer set-ups and bridges. Housed in a bakelite case with lamp and scale arrangement. Taut band type movement. Movement sufficiently protected against shocks. Alcomax magnet properly aged for high stability. Operated at mains 220 Volts AC or 6 Volts DC. Band switch for 5 shunt powers 1, 1/10, 1/1000 and short circuit.

BICYCLE DYNAMO 1538
A cycle dynamo on a wooden base 200 x115x12mm. and provided with two sets of gears driven by a hand crank for fast or slow rotation. Two 4mm socket terminals are provided for the dynamo output, connected in parallel with an M.E.S. lamp holder and 2.5V bulb.

ELECTRIC MOTOR KIT 1539
Based on arts from the Westminster electromagnetic kit comprising 6 wood support base 100x45x10mm, length x width x height, 6 wood armatures, 6 aluminium shafts, 6 mild steel yokes, 12 magnets, 24 split pins, 125 rivets, 1 reel plastic covered copper wire, 3mtr tubing.

MAGNET FIELD TUBE 1540
Ideal for 3-D demonstrations of magnetic fields. Constructed of a sealed round plastic viewing tube with 1.3 oz of iron filings encased and designed with a half inch diameter hole through the center for the super strong alnico cylindrical magnet. Size: 4” L X 3” in diameter.

MAGNETIC FIELD DEMONSTRATOR 1541
Ideal for 3-D demonstrations of magnetic fields. Constructed of a sealed round plastic viewing tube with 1.3 oz of iron fillings in fluid of proper viscosity. Unit can be placed on an overhead projector for classroom demonstrations.

FARADAY’S ELECTROMAGNETIC INDUCTION PROJECTUALS SET 1542
These projectuals can be used with or without an overhead projector to study electricity and magnetism, from the simple magnet to electromagnetic induction. A series of experiments paralleling Faraday’s work are performed using a milliammeter and 3 solenoids of 20, 40 and 80 turns. Includes study guides. The meter can also be used in other experiments.

LENZ’S LAW APPARATUS 1543
Consists of 2 metal rings connected by an aluminum beam that can rotate freely on a support. One of the rings is a closed loop; the other has an opening for comparison. When a bar magnet moves into or out of the loop, the magnetic flux will change. According to Lenz’s law, a current will be induced in the loop to oppose the change. Students can verify the law by analyzing the movement of the loop.

IRONCLAD ELECTROMAGNET 1544
In 1820 Hans Christian Oersted discovered that electric currents produce magnetic fields-electromagnetism. Study electromagnetism by observing the effect of using multiple batteries to change Voltage and Amperage and how this relates to magnetic field. Experiments with lifting capacity and explore user for the electromagnet. Requires 4 batteries (not included).

FERROFLUID DISPLAY CELL 1545
With this display cell you can easily demonstrate magnetic lines of force in 3 dimensions. The cell is composed of a sealed glass vessel 18mm H x 6.5 mm diameter that contains a specially formulated mixture of clear liquid transport medium and magnetically reactive compound known as a ferrofluid. Ferrofluids take on the shape of the magnetic field that is passing through them. As a result, you can visualize the field in 3 dimensions. The display cell keeps the fluid from evaporating and also keeps the fluid from coating magnets that are brought close to it.

FERROFLUIDIC ADVENTURE SCIENCE KIT 1546
Explore the science of magnetism with an amazing substance known as ferro-fluid. Visualize magnetic field lines and lines of force in 3 dimensions. This Kit-to be used by students working in groups of 4 or as a teacher demonstration-contain all materials necessary to perform experiments about magnetic lines of force around permanent and electromagnets, magnetic shielding, floating pennies and other objects, by the variable density properties of a ferro-fluid in a magnetic field. Through these activities students learn where ferrofluids are used in objects they use every day. This kit can also be used to show students how to construct artistic 3-D magnetic structures.
Kit includes: MSDS sheets, 2-ml transfer pipette, power ring magnets, sealed display cell, 3-ml syringe, letter "A" Magnet, 50-ml bottle, EFH Ferro-fluid, 2 blue button magnets, 5 aluminum dishes and a pair of protective latex gloves.

MAGNETIZING AND DE-MAGNETIZING COIL 1547
Low voltage, suitable for magnetizing and demagnetizing ordinary magnets, iron bars, strips, etc. Comprises a solenoid wound with insulated copper wire and mounted on a base, complete with switch and 4mm terminals. Solenoid 250mm long x 35mm internal diameter. Operating voltage 12V A.C. or D.C. at 6A, Magnetizing by A.C. or D.C., Demagnetizing by A.C. only

MAGNETIC FIELD DEMONSTRATION, VERTICAL COILS 1548
Single turn and 5 turn coils for investigating magnetic field associated with a vertical coil. Maximum current is 8A for the single turn and 5A for the 5 turn. Coil diameters 62mm copper wire diameter 1.5mm.

MAGNETIC FIELD DEMONSTRATION, LONG SOLENOID 1549
For investigating the magnetic field associated with a solenoid coil. Coil 51 x 92mm (diameter x length) copper wire 1.5mm diameter.

INDUCED CURRENT APPARATUS 1550
Consisting of primary coil of insulated copper wire wound upon cylinder with terminals, secondary coil wound upon cylinder into which primary fits. A soft iron core fits the cylinder of the primary. Complete with terminals.