The thermoelectric effect is the direct conversion of temperature differences to electric voltage and vice versa via
a thermocouple. This effect can be used to generate electricity, measure temperature or change the temperature
of objects.

The apparatus consists of two aluminium plates connected via a switch to two terminals to which a voltmeter is plugged in. The two jars are filled with water, one hot one cold.  When turned on a voltage will be shown, the value of which depends on the difference in temperature. Reading may also be taken as the temperature is increased.

Stands 26cm tall.