For showing the difference in conductivity.
Rod 300 x 18 mm half brass & half polished wood.
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GRAVESANDE – Ring and ball, mounted on separate handle ball.
An apparatus for demonstrating thermal expansion, comprising a captive brass ball secured to a mounted brass ring by a chin, Ring mounted on rod with a wooden handle. The ball passes through the ring when cold but will not pass through after being heated.
One piece spinning with parallel sides & rolled rim.. Size: 75 x 50 mm 100 x 75 mm
A model of four stroke water – cooled diesel engine .. This is of the chain-driven overhead camshaft type and all functional components like camshaft, rock – arms,. tappets etc. are clearly demonstrated. The functioning of fuel injection system is also represented. Ignition is shown by means of a miniature bulb. Mounted on base.
The model demonstrates the principle operation. It is cut way to show the internal constructional details.
The power piston is an arch like triangular rotar which on rotating generates an epitrechoid. Mounted on base.
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