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Ball & Ring
(DI-2372)
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 |
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Bar & Gauge
(DI-2374/75)
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. |
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Expansion
Apparatus
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. |
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4 Stroke Petrol Engine Model
(DI-2505)
Air cooled, four stroke, with operation of valves clearly shown.
Mounted on a polished wooden base with schematic diagram, overall
height 450 mm approx
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Model of
Steam Engine (DI-2501)
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.
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Thermal
Conductivity of Metals Apparatus (DI-2392)
Strips of four different metals fixed on a wooden ring of outer diam.
130 mm and each having a depression for putting wax. |
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Convection
of Heat in Air Apparatus
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. |
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Crooke's
Radiomater
(DI-2445/46)
Set of 4 mica vanes, with one side of each blackened, in a partially
exhausted glass bulb, with stand. |
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Fly Wheel Unit
Steel fly wheel 100 mm dia. with pulley 20 mm diam. on shaft held in
brackets, mounted on base.
B.FLY
WHEEL UNIT:- 20 CM DIA AND 4.5 C.M.THICK WHEEL TURNED TRUE AND
CAREFULLY BALANCED MOUNTED ON HORIZONTAL SHAFTD
HELD IN
BALL BEARINGS. THE WHEEL IS MARKED AND POINTER IS FIXED |
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Ingenhousz's Apparatus
To demonstrate different conductivities of different metals. Rods of
5 different metals and wood, fitted along one side of a metal tank.
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