Aim
Ro observes conduction along a metal rod.

Method

1. set up and light a bunsen burner
2. smear a small amount of petroleum jelly on to the head of each drawing pin.
3. attach the drawing pins at even intervals along the length of the metal rod.
4. Clamp one end of the metal rod to a retort stand.
5. position the retort stand so the unclamped end of the metal rod is in the bunsen burner flame and start the stopwatch.
6. Record the time it takes for each pin to drop on the table below...

Resalts
pin 1. 12 sec
pin 2. 27 sec
pin 3. 50 sec
pin 4. 1min 49 sec

Explanation
As the mettle rod heated the particles started vibrating more because of the extream heat and that made the heat transfer from 1 place to another causing the pins to drop off.