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  2. Torricelli's experiment - Wikipedia

    en.wikipedia.org/wiki/Torricelli's_experiment

    The experiment uses a simple barometer to measure the pressure of air, filling it with mercury up until 75% of the tube. Any air bubbles in the tube must be removed by inverting several times. After that, a clean mercury is filled once again until the tube is completely full. The barometer is then placed inverted on the dish full of mercury.

  3. Barometer - Wikipedia

    en.wikipedia.org/wiki/Barometer

    A mercury barometer is an instrument used to measure atmospheric pressure in a certain location and has a vertical glass tube closed at the top sitting in an open mercury-filled basin at the bottom. Mercury in the tube adjusts until the weight of it balances the atmospheric force exerted on the reservoir.

  4. File:MercuryBarometer.svg - Wikipedia

    en.wikipedia.org/wiki/File:MercuryBarometer.svg

    The following other wikis use this file: Usage on en.wikibooks.org Planet Earth/4e. Blaise Pascal and his Barometer; Planet Earth/print version

  5. Barometric light - Wikipedia

    en.wikipedia.org/wiki/Barometric_light

    Barometric light was first observed in 1675 by the French astronomer Jean Picard: [4] "Towards the year 1676, Monsieur Picard was transporting his barometer from the Observatory to Port Saint Michel during the night, [when] he noticed a light in a part of the tube where the mercury was moving; this phenomenon having surprised him, he immediately reported it to the sçavans, ... "[5] [6] The ...

  6. Jean Nicolas Fortin - Wikipedia

    en.wikipedia.org/wiki/Jean_Nicolas_Fortin

    Jean Nicolas Fortin (1750–1831) was a French maker of scientific instruments, born on 9 August 1750 [1] in Mouchy-la-Ville [2] in Picardy.Among his customers were such noted scientists as Lavoisier, [2] for whom he made a precision balance, [3] Gay-Lussac, [2] François Arago [2] and Pierre Dulong.

  7. Meteorological instrumentation - Wikipedia

    en.wikipedia.org/wiki/Meteorological_instrumentation

    In 1643, Evangelista Torricelli invents the mercury barometer. [1] In 1662, Sir Christopher Wren invented the mechanical, self-emptying, tipping bucket rain gauge. In 1714, Gabriel Fahrenheit creates a reliable scale for measuring temperature with a mercury-type thermometer. [ 2 ]

  8. Barograph - Wikipedia

    en.wikipedia.org/wiki/Barograph

    The changing height of the mercury in the barometer was recorded on a continuously moving photosensitive surface. [5] By 1847, a sophisticated temperature-compensation mechanism was also employed. Ronalds’ barograph was utilised by the UK Meteorological Office for many years to assist in weather forecasting and the machines were supplied to ...

  9. Evangelista Torricelli - Wikipedia

    en.wikipedia.org/wiki/Evangelista_Torricelli

    The barometer arose from the need to solve a theoretical and practical problem: a suction pump could only raise water up to a height of 10 metres (34 ft) (as recounted in Galileo's Two New Sciences). In the early 1600s, Torricelli's teacher, Galileo, argued that suction pumps were able to draw water from a well because of the "force of vacuum."