This paper discusses the effects of atmospheric pressure on natural gas measurement. Atmospheric pressure is the force per unit area, pressure, created by the atmosphere, (air and water vapor) in a column directly above a one square inch area on the ground all the way to the edge of outer space. We are not aware of the pressure from the weight of the air on us as we have always felt it A pioneering scientist in the 1800's named Evangelista Torricelli discovered that air actually has weight, which he called atmospheric pressure. Torricelli stated, 'We live submerged at the bottom of an ocean of elemental air. The earth's gravitational field is pulling on air, and this pull, or pressure of air is called atmospheric pressure.' Torricelli went on to develop an instrument to measure the atmospheric pressure, the mercury barometer.
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