Glass working model with visible valves, fitted on wooden stand, complete with water reservoir.

Four stroke water cooled diesel engine, shows functioning of fuel injection system together with hot coil starting device.

Air cooled, four stroke, with operation of valves clearly shown. Mounted on a polished wooden base with schematic diagram, overall height 450 mm approx.

Specification.

Comprising plastic fomer with terminals and circle marked 0-180-0 divided and figured every 45 degree, with magnet pivot, wound with 30 turns enamelled copper wire and complete with 75mm magnetic needel with brass bearing operates on voltage 4-6 volts.

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.

Consists of sixteen pieces of various geometrical models and figures. Made of hard wood and supplied in wooden/plastic box.

Made from imported optical glass with optically worked surfaces. All angles accurately worked with edges slightly bevelled and glass free from bubbles.

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

For electroscope, spare.

Suitable for spectrum tubes, in case, with on/off and selector switch. Output 5 KV, 2-3 millamps. Operates on 220V A.C. 50Hz + 10%.

A three limbed glass tube is mounted on a wooden stand with a scale for each of the two 600 mm tubes. A rubber tube with Hoffman clip is provided for the short limb. Two metal sliding distance rods may be so adjusted that their lower ends just touch the surface of the liquid under experiment to facilitate column height readings. Overall dimensions 680 x 300 x 150 mm approx.

Vertical tube with two parallel wire cathodes at two end of tubes with third electrode to serve as anode on base.

Specification.

Consists of a 12 cm long mirror scale, a spring with provision to hang masses. Supplied without masses.

To show the maximum density of water. Sheet iron cylinder 203 x 50 mm height x diameter, mounted on a base and encircled midway along its length by a gallery 63 x 100 mm, height x diameter. Fitted with tubulures to carry thermometers and rubber stoppers.

Heavy, two cylinders of 40 mm & 15 mm diam. with pistons fitted with non-return valves, worked by a hand lever,a stopcock at bottom of the smaller cylinder, removable loading platform, strong construction.

For determining specific gravity by Archimedes principle.With one pair of long frames and one short frame with a hook underneath for specific gravity experiments.With three pans,adjustable stand and scale. Mounted on a wooden base.

For the determination of the upper fixed points of thermometers and boiling points at barometric pressures other than atmospheric. Double walled copper cylinder 34 x 6 cm height x outer dia mounted on steam boiler. Fitted with thermometer tubulure at the top, side outlet draining tube and glass manometer mounted in tubulure with rubber bungs.

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

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.

Electronic solid state induction coil, but without vibrator, fitted with reversing switch, operated on 220V A.C. + 15%. Spark in mm : 25, 50, 75, 100

Operation of a commercial steam engine is well illustrated with this working model. The extra large size unit is provided with a horizontal boiler with a whistle, safety valve, steam guage, on metal base. Operates on 220V A.C. 50 Hz.

Pocket size multimeter is self-contained portable test set that mesures a wide range of Voltages. Currents and Resistances. This is an indispensable instrument for servicing and maintenance of electronic equipment, radio and television. The meter is so designed and its movement is heavily damped to avoid damage to the meter movement.

Mounted on transparent base, with 4mm color coded sockets, with circuit diagram printed for demonstration.

Pair of glass plate, optically polished, 60mm diameter one plane the other plano-convex mounted together in metal frame. Pressure between plates adjustable by three brass nickel plated screws.