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Feb 15, 1564
Galileo Galilei
Galileo Galilei (1564-1642) developed the suction pump.In 1630, he obtained an apparatus which he used to pump water up a collumn. At the age of 66, he wondered why the water only reached a certain height of 10 meters. Unable to explain the unusual phenomena, other scientists devoted their lives trying to find answer to Galileo's discovery. -
Period: to
1600's to 1900's
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Otto Von Guericke
Otton von Guericke (1602-1686) developed a pump that created a very powerful vacuum in the years of 1643-1645. At the ages of 41-43 years old, he useda team of 16 horses to pull 2 metal hemisphesres apart. He hypothesized that the hemispheres was helb by a mechanical fornce in the athmostphere rather than the vacuum. -
Evangelista Torricelli
Evangelista Torricelli (1608-1647) developed the very first barometer. In 1643, Evangelista used a tube filled with mercury. The tube was closed at one end while the open end sits vertically on a shallow basin filled with mercury. The collumn of mercury left a gap of about 750mm at the top of the tube. At the age of 35, he discovered that the height of the collumn of mercury was equal to the athmospheric pressure acted upon the mercury on the basin. -
Blaise Pascal
Blaise Pascal (1623-1662) travelled up a mountain using Torricelli's barometer in 1648 at the age of 25. He discovered that the pressure of the athmostphere increased as he moved down the mountain and it decreased as he moved up. His discovery resulted in the SI units of Pascal. -
Christiaan Huygens
Christiaan Huygens (1629-1695) developed the manometer. In 1661, 32 years old Christiaan Huygens developed an apparatus to measure the elastic forces of various gases. -
John Dalton
John Dalton (1766-1844) discovered that the pressure of a mixture of gases is equal to the sum of the pressure of the gases present in the mixture. At the age of 35, this brilliant scientist made this discovery very early in the 1800's. The pressure exerted by each gas is called partial pressure. -
Amadeo Avogadro.
Amadeo Avogadro (1776-1856) suggested that pressure in a container is directly proportional to the number of particles in that certain container. At the age of 35, his educated guess became known as Avogardo's hypothesis in 1811. His hypothesis can be portrayed with a simple filling up a ballon with air experiment. As more air is added, the size of the balloon becomes larger. -
Joseph Louis Gay-Lussac
Joseph Louis Gay-Lussac (1778-1850) oberved the law of combining volumes at the age of 30. In 1808, he discovered that combining 2 volumes of hydrogen and 1 volume of oxygen produces 2 volumes of water.
