Clinical Thermometer - Mercury and Digital. - YouTube
A glass mercury thermometer shows the high temperature of the human body on its scale. Man's hand holds a diagnostic medical tool or measuring device Stock Photo - Alamy
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How are different types of thermometers (e.g. mercury, electronic) able to compare temperatures? - Quora
The Anatomy of a Liquid-in-Glass Thermometer
Mercury-in-glass thermometer - Wikipedia
Broken mercury thermometer at Stillwater Road condos in Deerfield
Measuring Temperature
How to read a Mercury Thermometer, How to Read a Glass Thermometer To Check Body Temperature, Read Mercury Fever Thermometer