Define how a liquid-in-glass thermometer can be used to measure temperature in degrees Celsius. 

Define how a liquid-in-glass thermometer can be used to measure temperature in degrees Celsius.

• A bulb is inserted in pure ice-water mixture.
• After some time, the constant length, l₀ of mercury thread is recorded.
• The bulb is inserted in steam and constant length, l₁₀₀ of mercury thread is recorded.
• When l_θ is the length of mercury thread inserted in an unknown enclosure of temperature, θ⁰, then

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