Did You Know?
How to fix max and min temps?
Maximum and minimum temperatures are measured using thermometers mounted inside a wooden box with slits, called Stevenson's screen, which is generally kept facing north. The maximum thermometer is mercury-in-glass - as the temperature rises, the mercury expands and moves freely up a constriction in the thermometer. When air temperature drops, the constriction prevents the mercury from flowing back due to higher pressure, and gives the maximum reading. The minimum thermometer is alcohol-in-glass and is kept horizontally inside the box.
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