It was one of Daniel Gabriel Fahrenheit’s most famous inventions, in 1714. But after nearly 300 years on the market, the still-common mercury thermometer now appears headed for extinction. While many ...

FARGO — The principal of a liquid-in-glass thermometer is that the liquid inside a very narrow tube will contract and expand with temperature variation. The top of the liquid represents the ...

Temperatures taken from mercury thermometers by the U.S. Weather Bureau in the late 1800s were actually more accurate than the readings from today’s electronic thermometers. Once calibrated, a mercury ...

FARGO — The principal of a liquid-in-glass thermometer is that the liquid inside a very narrow tube will contract and expand with temperature variation. The top of the liquid represents the ...

BALTIMORE — It was one of Daniel Gabriel Fahrenheit”s most famous inventions, in 1714. But after nearly 300 years on the market, the still-common mercury thermometer appears headed for extinction.

BALTIMORE – It was one of Daniel Gabriel Fahrenheit’s most famous inventions, in 1714. But after nearly 300 years on the market, the still-common mercury thermometer now appears headed for extinction.

BALTIMORE -- It was one of Daniel Gabriel Fahrenheit's most famous inventions, in 1714. But after nearly 300 years on the market, the still-common mercury thermometer now appears headed for extinction ...

BALTIMORE - It was one of Daniel Gabriel Fahrenheit's most famous inventions, in 1714. But after nearly 300 years on the market, the still-common mercury thermometer now appears headed for extinction.