The temperature scale on the glass tube shows the reading in degrees Celsius (°C) or Fahrenheit (°F). Since mercury is toxic, most modern thermometers use alcohol, which is dyed red or blue for ...

Analog and digital candy thermometers are both important to have on hand, ... (which replaced mercury) inside the glass tube rises in response to the heat of the substance it's resting in.

Today, most climate science is done with satellites, sensors and complicated computer models. But it all started with two glass tubes. "A woman, about 170 years ago, used a very simple ...

Thermometers. The zeroth law of thermodynamics defines temperature and makes thermometers possible. ... Fahrenheit invented the familiar glass-tube-type thermometers using both alcohol and mercury.

A finished mercury-in-glass thermometer requires at least 25 intricate steps including blending the mercury bulb, crafting the neck of the tube and narrowing the throat.

The early thermoscopes basically consisted of a vertically oriented glass tube with a bulb at the top and a base suspended in a pool of liquid such as water, which ran up a length of the column.

Building a thermometer is a matter of precise technology—putting just the right amount of mercury into a specially designed glass tube, for instance—but determining which numbers to use on the ...

He also purchased Croydon Thermometer Co. of Rochester, N.Y., and expanded his line from dial and cooking thermometers to glass tube thermometers. In 1965, Wallace built a new, ...

Boiling tube: A slightly larger glass test tube. Used to heat substances over a Bunsen burner. Thermometer: A device that measures temperature. Funnel: A tube that is wide at one end and narrow at ...