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

A model of two-stroke diesel engine made in aluminium alloy and gun metal. Ignition is shown by means of a miniature bulb. Fuel supply is also sectioned. With hand crank, provided for manual operation. Mounted on base, with printed diagram showing working.

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

Represents internal structure and operating principles of an air-cooled two stroke engine. All parts in aluminium alloy. Ignition is shown by means of a mainature bulb. Carburetter and fuel supply also sectioned. Mounted on base, with printed diagram showing working.

To illustrate expansion of metal on heating and contraction on cooling, with steel bar of length 100 x 10 mm and plated brass gauge with a cut-out to just accommodate the bar and two holes through which the bar passes when cold.

Copper calorimeter 75 x 50 mm with felt insulation, outer vessel of 100 x 65 mm size with a plastic lid having holes for thermometer & stirrer. A thermometer holder is fixed to the outer vessel. Complete with stirrer.

Brass and iron, 200x25 mm, rivetted, with wooden handle.

Metal box, 230 x 75 x 75 mm, with sliding glass front and two detachable glass chimneys, with one candle holder under left chimney. Supplied without candles.

Spark in mm : 25, 50, 75, 100

Two cast metal uprights, height 18 cm, fitted with two nickel plated rods supporting expansion bar of length 38 cm. Expansion bar is fixed to one upright and moves a pointer on the other, when heated. With scale reading0 to 90°, supplied with one each aluminium, brass and iron expansion bars.

For demonstrating the different thermal expansions of various liquids.

Comprising five bulb tubes with plastic scales, mounted in a frame and supported in a water trough 240 x 108 x 77 mm deep.

The frame has clamps to secure it to the trough and two cross members, the lower cross member having holes, and the upper tubules to locate the bulb tubes.

Dimensions overall 240 x 115 x 460 mm high approx. Bulb diameter 35 mm. Bulb stem 400 mm. Supplied complete with glass bulbs and scale.

About 20 cms in dia by 44 mm wide turned and carefully balanced, mounted on a horizontal shaft, held in ball bearings. The wheel is marked and pointer is fixed to the bracket. The bracket has four holes and can be fixed to the wall also.

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.

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.

To demonstrate different conductivities of different metals. Rods of 5 different metals and wood, fitted along one side of a metal tank.

Nickel plated copper calorimeter of 63 x 63 mm lagged and enclosed in an outer vessel of 80 x 90 mm size, with cover having terminals, a heating coil suitable for 3-6 V supply and holes for thermometer & stirrer. With stirrer but without thermometer.

Locomotive design, sectional, the valve and piston mechanism clearly visible through a glass plate with forward and reverse motions, demonstrates working with an air blower or even with mouth blowing.

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.

Gravesande?s, ring mounted in rod with handle, ball with chain. Cold ball passes through the ring but does not pass when heated the ring & the ball with separate handles.

Comprising strips of copper, iron aluminium and brass fixed on wooden ring meeting in the centre, outer ends of the strips formed with small cups.

A set of metal rods 300 x 3 mm diameter comprising one each of Aluminium(240), Iron(72), Copper(395), Lead(34), Brass(128), Zinc(112).

Comprising six cylinders, size 38 x 9.5 mm diameter, one each copper, lead, brass, zinc, iron, aluminium.

One each wires copper and constantan approximately 305 mm long, twisted and brazed together.

To demonstrate generation of electricity when the junction of two unlike metal is heated.

For showing the principles of platinum resistance thermonetry and for accurate temperature measurement using a bridge method such as 'Cary-Foster' bridge.

The thermometer comprises a length of fine platinum wire of about 2 ohm resistance, wound non-inductively on a mica frame and soldered to stout copper leads. A pair of compensating leads are provided, all four leads being connected to 4mm socket terminals. Since the connection are soft soldered, this resistance thermometer is suitable for temperatures up to about 150^oC only and for low termperature work.

It consists of 12 pairs of Bismuth and Antimony bars joined together in series with insulation between them. The couples thus arranged are enclosed in a brass frame having two terminals connected to the Bismuth and Antimony poles. Complete with nickel-plated brass cone and mounted on an adjustable stand.

Cylinderical copper rod about 300 mm length 25 mm diameter, one end containing a steam chamber connected to inlet and outlet tubes, other end of copper rod has cavity connected via thermometer pockets to water inlet and outlet tubes. Through two thermometers supports tubes 75 mm apart are inserted in the rod for finding the temperature at two points. Fitted in teakwood polished case packed with felt with removable front, without thermometers.

Horizontal type Micrometer screw form. Two cast end pieces joined by two metal rods having support for brass tube nickel plated 50 cm long, 1 cm dia. With riffled inlet and outlet for connection to a steam supply and tubulure for thermometer. One end-piece fitted with sphereometer reading to 0.01 mm and other with contact screw. The end pieces are provided with terminals for connecting bell or galvanometer for indicating exact point of contact of the screw. Supplied with three metal rods one each of copper, brass and iron.

75 x 50 mm diameter resting on felt pad inside an outer vessel, 100 x 75 mm diameter. Outer vessel fitted with detachable clip-type thermometer support. Complete with stirrer.

Copper, cylinderical vessel 280 x 115 mm overall height x diameter, capacity 1.5 liters, neck 23 mm dia. With riffled side tube 9.5 mm maximum outer dia and water gauge.

Cylinderical copper vessel 180 x 115 mm height x diameter, with filling tube, steam vent and vertical tube terminating the chute passing through side of vessel. Brass tube, a sliding fit in the central tube, to carry thermometer. Lower end cut at an angle to seal the chute.