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Blaise Pascal: Barometers
built 617 days ago
Pascal replicated the experiment in Paris by carrying a barometer up to the top of the bell tower at the church of Saint-Jacques-de-la-Boucherie, a height of about fifty meters. The mercury dropped two lines. These, and other lesser experiments carried out by Pascal, were hailed throughout Europe as establishing the principle and value of the barometer.
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Now a committed Christian, Pascal continued his work in science and mathematics. Pascal’s experiments with the barometer proved the now familiar facts that atmospheric pressure (as shown by the height of the mercury in the barometer) decreases as altitude increases, and ... changes as the weather changes. Pascal made a valuable contribution to developing both hydrostatics and hydrodynamics.6 He showed that the ‘pressure applied to a confined liquid is transmitted undiminished through the liquid in all directions, regardless of the area to which the pressure is applied.’ This is known as Pascal’s Law and is the principle behind the hydraulic press, which Pascal designed. During these experiments with fluids, Pascal invented the syringe.
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In the physical sciences, Pascal developed Pascal's Law, which states that pressure applied to a confined liquid at any point is transmitted undiminished throughout the fluid in all directions equally. Practical applications of Pascal's law are still seen today in hydraulic machines and in the barometer.
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