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" The weight of this mercury is sustained by and exactly balances the downward pressure of the air upon the surface of the mercury in the cup. The height of... "
Hearst's International - Page 1201
1906
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The Principles of Hydrostatics: Designed for the Use of Students in the ...

Samuel Vince - 1812 - 120 pages
...filled is called a Barometer. PROP. LVII. The mercury is suspended in the tube of a barometer, by the pressure of the air upon the surface of the mercury in the bason. (128.) For if a barometer mn be put under the receiver of an air-pump, and the air be exhausted,...
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First Statement on the Part of Great Britain, According to the Provisions of ...

Great Britain - 1829 - 346 pages
...rationally concluded that the weight of the column of mercury in the tube, must be Report balanced by the pressure of the air upon the surface of the mercury in the basin. This experiment gave rise to the barometer, an instrument for mentofAimeasuring the weight of...
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Spons' Dictionary of Engineering, Civil, Mechanical, Military, and ..., Volume 1

Edward Spon, Oliver Byrne, Ernest Spon, Francis N. Spon - 1874
...tube above the level of the mercury in the basin. That the mercury is sustained in the tube by the pressure of the air upon the surface of the mercury in the basin may be proved by placing the c barometer under the receiver of an air-pump. As the air is exhausted,...
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Elementary Natural of Philosophy: Designed for High Schools and Academies

La Roy Freese Griffin - 1882 - 295 pages
...Torricelli, a pupil of Galileo, and he explained the phenomenon. 313. The mercury is held in the tube by the pressure of the air upon the surface of the mercury in the vessel, and it leaves a vacuum in the top because the weight of the column extending to the top of...
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Natural Philosophy

Isaac Sharpless, George Morris Philips - 1883 - 350 pages
...tube will sink until it is about 30 inches high, then it will stand there, being just balanced by the pressure of the air upon the surface of the mercury in the basin. We have found that a column of mercury 30 inches high weighs the same as a column of air of...
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Elementary Schools how to Increase Their Utility: Being Six Lectures ...

William Bousfield - 1890 - 189 pages
...to satisfy himself that the force which kept this column of mercury from falling was really due to the downward pressure of the air upon the surface of the mercury, repeated Torricelli's experiment in the year 1646, by ascending one of the mountains in Auvergne. There...
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Elementary Schools how to Increase Their Utility: Being Six Lectures ...

William Bousfield - 1890 - 189 pages
...to satisfy himself that the force which kept this column of mercury from falling was really due to the downward pressure of the air upon the surface of the mercury, repeated Torricelli's experiment in the year 1646, by ascending one of the mountains in Auvergne. There...
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The Bay View Magazine

1907
...idea, and the principle of construction is somewhat similar to that employed in the self-recording barometer. It is not to be presumed that there are...mercurial barometers are constructed on this principle. One of the most interesting of the many instruments in use by the Weather Bureau is the barograph,...
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Lessons in Elementary Mechanics, Volume 1

W. H. Grieve - 1893
...to satisfy himself that the force which kept this column of mercury from falling was really due to the downward pressure of the air upon the surface of the mercury in the cup, repeated Torricelli's experiment in the year 1646, ascending one of the mountains in Auvergne for that...
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Circular. A-G

United States. Weather Bureau - 1894
...mercury remaining in the tube will, at sea-level stations, be about 30 inches high. The weight of this mercury is sustained by and exactly balances the downward pressure of the. air upon the surface of the mercuryjn the cup. The height of such a mercurial column, therefore, becomes a measure of the pressure...
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