For showing the difference in conductivity.
Rod 300 x 18 mm half brass & half polished wood.
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GRAVESANDE – Ring and Ball with Chain. 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
This is a demonstration model with oscillating cylinder, safty valve and whistle and throttle valve, fuel heated.
The model is mounted on a metal base.
Good quality one piece spinning, rolled rim, polished finish vessel with wooden/bakelite lid fitted with rubber stopper and metal stirrer.. A. Copper 75 x 50 mm B. Copper 100 x 75 mm C. Aluminium 75 x 50 mm D. Aluminium 100 x 75 mm
1 copper calorimeter, 1 wooden outer box with felt lining, 1 sliding wooden cover for outer box, 1 copper stirrer with loop to fit inside the copper calorimeter, 1 thermometer holder made of brass, removable.
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