Meteorological Instrument Six's Thermometer

Six's Thermometer is a combination of maximum and minimum thermometers. It consists of two separate columns of mercury or alcohol, each with a small constriction. The mercury or alcohol expands with heat, pushing the column up, but when the temperature decreases, it contracts, leaving a visible mark at the highest and lowest points reached. These marks can be read and reset manually.
This device is used to record the highest and lowest temperatures reached within a specific period. It provides valuable data for assessing temperature fluctuations and trends over time. The maximum and minimum thermometer enables users to track and analyse temperature changes within a defined period, facilitating proper temperature control and management in diverse settings.