THE INVENTION O THE THERMOMETER

THE INVENTION OF THE THERMOMETER

By Bárbara Medina y Lucía Barras

Old and modern thermometers.

A homemade Alcohol-in-glass thermometer.

Mercury thermometer.

A mercury thermometer is a type of thermometer that is usually used to measure temperatures. The mercury of this type of thermometer is in a reflective bulb and usually bright white, which prevents the absorption of radiation from the environment. In 1714, Daniel Gabriel Fahrenheit created the bulb mercury thermometer, formed by a glass capillary of uniform diameter connected at its end with a blister filled with mercury. The whole is sealed and when the temperature rises, the mercury expands and rises through the capillary.

A thermometer for the North Pole.

Alcohol thermometers are used rather than mercury thermometers in very cold regions because alcohol has a lower freezing point than mercury.

Calibrating a Thermometer without using another thermometer

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