To graduate an unmarked mercury-in-glass thermometer, follow a process based on mercury expansion in response to temperature changes.
To graduate an unmarked mercury-in-glass thermometer without another thermometer, you can follow a procedure based on the expansion of mercury in response to temperature changes. One method is to immerse the thermometer in melting ice and boiling water, marking the levels as 0°C and 100°C respectively. Then divide the space between the markings into 100 equal intervals to define the temperature scale.
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