Description – and working:
1. Six invented the maximum minimum thermometer (MMT) thermometer to measure highest and lowest temperatures of’ a place.
2. This consists of a cylindrical bulb A, connected through a U-shaped tube to spherical bulb B that contains alcohol.
3. When the temperature increases, the alcohol in the bulb A expands.
4. The mercury in the U tube goes up to the bulb B side and the indicatorfl also moves up.
5. This indicates maximum temperature of the day.
6. If the temperature decreases, alcohol in the bulb A contracts then the mercury in the U-tube goes to the A bulb side and the indicator (I ) also moves up.
7. This indicates the minimum temperature of the day.
8. After taking readings the indicators I2 and I1 are brought to their original places by using a magnet.
