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Galileo Galilei
Galileo was born in 1564 in Pisa, Italy. In 1594, he worked on the development of the suction pump. He created a machine that pumps out water to irrigate the land around him. The air was used to draw the water that was underground. Unfortunately there was a limit to how much water would rise inside the pump and he couln't fully explain as to why this was. -
Evangelist Torricelli
Torricelli was an Italian physicist who was born in 1608. He carried on from Galileo's work and was able to explain that the reason there was a limit to how much water could rise was due to the atmospheric pressure. He created the barometer, which is a tube with an open end set in mercury. The mercury rose until 760 and then stopped. Torricelli concluded that the reason for this was because of a foce on earth and that the space above the mercury level is a vacuum. -
Otto von Guericke
Guericke was born in Magdeburg, Germany and he developed an air pump that pumped out the air of two large, metal hemispheres. The force holding the two hemispheres together was stronger than the two teams of horses trying to pull them apart. Guericke concluded that there was a mechanical force of atmospheric pressure holding them together rather than a vacuum, which was what Torricelli hypothesized. -
Blaise Pascall
Blaise Pascal was a french mathematician and physicist that concluded that the pressure of the atmosphere decreased when he travelled farther up a mountain and increased as he moved down. To conclude this, he used Toricelli's barometer. Eventually, one of the pressure units would be named after him. -
Christiaan Huygens
Christiaan Huygens was born on April 14, 1629 and was a prominent Dutch mathemetician and scientist. He contributed to the development of the measurement of pressure by creating the manometer in 1661. -
John Dalton
John Dalton was born in England in 1766. He developed a law that states that the total pressure exerted by a mixture of non-reacting gases, is equal to the sum of the partial pressures of each gas. -
Joseph Louis Gay-Lussac
Joseph Gay-Lussac was a french chemist thatmconcluded if you combine 2 volumes of hydrogen and 1 volume of oxygen would react to form 1 volume of gaseous water. -
Amadeo Avogadro
Amadeo Avogadro was an italian scientist who concluded that the pressure in a gas is directly purportionate to the particles in the container, or equal volumes of all gases, at the same temperature and pressure, have the same number of molecules.
