|
The principle of the mercury barometer was discovered by the Italian physicist Evangelista Torricelli in about 1643. That principle can be illustrated as follows: a long glass tube is sealed at one end and then filled with liquid mercury metal.
|
www.scienceclarified.com/As-Bi/Barometer.html
www.scienceclarified.com/As-Bi/Barometer.html
|
|
|
|
The classic mercury barometer is typically a glass tube about 3 feet high with one end open and the other end sealed. The tube is filled with mercury. This glass tube sits upside down in a container, called the reservoir, which also contains mercury.
|
weather.about.com/od/weatherinstruments/a/barometers.ht...
weather.about.com/od/weatherinstruments/a/barometers.htm
|
|
|
The Fortin type barometer consists of a long glass tube sealed at one end and filled with mercury. The tube is inverted so that the open end is submerged in a cistern of mercury. The height of the mercury in the tube is a measure of the atmospheric pressure acting on the mercury in the cistern. ... In both types,
|
www.novalynx.com/230-7420.html
|
|
|
|
|
USATODAY.com Latest News ... How a barometer measures air pressure ... Evangelista Torricelli invented the mercury barometer in 1643 and today's mercury barometers are much like those of the 17th century.
|
www.usatoday.com/weather/wbaromtr.htm
|
|
|
The mercury barometer is the standard instrument for atmospheric pressure measurement in weather reporting. The decrease in atmospheric pressure with height can be predicted from the barometric formula.
|
hyperphysics.phy-astr.gsu.edu/Hbase/pman.html
|
|
Because a barometer's mercury level moves very slowly and by minute amounts, barometers all have a "set" indicator. This will be a hand or pointer, usually made of brass, and operated manually. ... 1. Is the barometer actually working? ; There are two forms of mercury barometer;
|
www.charlesedwin.com/rdbrms.htm
|
|
The Mercury Barometer ... In this document we discuss measuring atmospheric pressure using a Mercury Barometer. This instrument is also known as a Fortin Barometer. This type of instrument was first used by Torricelli in 1643; Fortin slightly modified the original design in 1810...
|
www.upscale.utoronto.ca/GeneralInterest/Harrison/Barome...
www.upscale.utoronto.ca/GeneralInterest/Harrison/Barometer/Barometer.html
|
|
There are two main types of barometer that are used. The mercury barometer is seldom seen these days: mercury is expensive, its toxicity is taken much more seriously than it once was, and the instrument itself is large and unwieldy.
|
www.madsci.org/posts/archives/sep2000/969071503.Es.r.ht...
www.madsci.org/posts/archives/sep2000/969071503.Es.r.html
|
|
