FARGO — The barometer is one of the basic instruments of meteorology. It is used to measure air pressure. The word comes from a combination of two Greek words; "baro," meaning weight, and "meter," ...

Nicolas Fortin, an instrument maker in Paris in the early nineteenth century, introduced a mercury barometer with a glass and leather cistern so designed that the barometer could be safely moved from ...

This segment originally appeared in today's edition of the Morning Brief newsletter. Sign up here to get weekday updates from The Weather Channel and our meteorologists. A barometer is a tool ...