Question

Name the thermometric substances used in the following thermometers.

1. Rutherford's maximum thermometer
2. Rutherford's minimum thermometer.

Answer 1

1. A tiny steel spring inside the tube.
2. The physical properties of the materials which change uniformly with temperature and are used for measuring the temperature are called thermometric properties and the materials used for making thermometers are called thermometric substances.
3. The aspect that made the Rutherford maximum and minimum thermometer innovative was the way the temperatures reached were marked by a tiny steel spring inside the tube.
4. This would be pushed up by the mercury or down by the spirit, and lodge at the extreme positions of the readings.