thermal conduction demonstration

ABDNP:201275a

Metal disc with 5 circular holes around it. Stuck into 3 of the holes is a cork with a metal rod through it. The metal rods meet up in the centre and are quite long. The whole device can be held by a handle on the end of a shorter rod at the top of the disc. Each rod is made out of a different metal gold, silver and bronze. The gold and silver rods are covered in candle wax. To use: cover the rods in wax then heat the centre of the device. The wax then drops off the metals which conduct heat the best and stay on the metals which are poorer conductors of heat.

1780-1850

radius 250mm, height 63mm

copper, steel and bronze

unknown