Timeline of the Measurement of Pressure by Manjot Singh Sainbhi

By hoops360

  • Galileo Galilei

    Galileo Galilei
    Galileo Galilei (1564-1642) was born on February 15, 1564. In 1930, he developed the suction pump at the age of 66. He used air to draw underground water up a column, similar to how a syringe draws water. He was perplexed as to why there was a limit to the height water could be raised.

  • Evangelista Torricelli

    Evangelista Torricelli
    Evangelista Torricelli was born on October 15, 1608. He developed the first barometer at the age of 35 (1643). He carried on Galileo's work by determining that the limit to the height Galileo's pump could draw water was due to atmospheric pressure. He invented a closed-end tube filled with mercury that was suspended in a shallow dish filled with liquid mercury. The height of the column of mercury in the tube (mmHg) was equal to the atmospheric pressure acting on the mercury in the pan,

  • Otto von Guericke

    Otto von Guericke
    Otto von Guericke was born on November 20, 1602. In 1643-1645, (42 years of age) he made a pump that could create a vacuum so strong that a team of 16 horses could not pull two metal hemispheres apart. He reasoned that the hemispheres were held together by the mechanical force of the atmospheric pressure rather than the vacuum.

  • Blaise Pascal

    Blaise Pascal
    Blaise Pascal was born on June 19, 1623. In 1648, at the age of 25, he used Torricelli's "barometer" and travelled up and down a mountain in southern France. He discovered that the pressure of the atmosphere incresed as he moved down the mountain. Sometime later the SI unit of pressure, the Pascal, was named after him.

  • Christiaan Huygens

    Christiaan Huygens
    Christiaan Huygens was born on April 14, 1629. In 1661, he developed the manometer to study the elastic forces in gases at the age of 32.

  • John Dalton

    John Dalton
    John Daton was born on September 6, 1766. In 1801, at the age of 36, he stated that in a mixture of gases the total pressure is equal to the sum of the pressure of each gas, as if they were in a container alone. The pressure exerted by each gas is called its partial pressure.

  • Joseph Louis Gay-Lussac

    Joseph Louis Gay-Lussac
    Joseph Louis Gay-Lussac was born on December 6, 1778. In 1808, at the age of 30, he observed the law of combining volumes. He noticed that, for example, two volumes of hydrogen combined with one volume of oxygen to form two volumes of water.

  • Amadeo Avogadro

    Amadeo Avogadro
    Amadeo Avogadro was born on August 9, 1776. In 1811, at the age of 35, he suggested, from Gay-Lussac's experiments conducted three years earlier, that the pressure in a container is directly proportional to the number of particles in that container (known as Avogadro's Hypothesis), This can be illustrated by blowing up a balloon, ball. or tire: the more air is added the larger the container becomes due to increased pressure.