Search results
Results From The WOW.Com Content Network
An aneroid barometer is an instrument used for measuring air pressure via a method that does not involve liquid. Invented in 1844 by French scientist Lucien Vidi, [23] the aneroid barometer uses a small, flexible metal box called an aneroid cell (capsule), which is made from an alloy of beryllium and copper. The evacuated capsule (or usually ...
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."
1630: Slide rule: invented by William Oughtred [387] [388] 1642: Mechanical calculator. The Pascaline is built by Blaise Pascal. [389] 1643: Barometer: invented by Evangelista Torricelli, or possibly up to three years earlier by Gasparo Berti. [390] 1650: Vacuum pump: Invented by Otto von Guericke. [391] 1656: Pendulum clock: Invented by ...
Lucien Vidie. Lucien Vidi (1805, Nantes – April 1866, Nantes) was a French physicist. In 1844 he invented the barograph, that is, a device to monitor pressure, a recording aneroid barometer.
1709 — Daniel Gabriel Fahrenheit constructed alcohol thermometers which were reproducible (i.e. two would give the same temperature) 1714 — Daniel Gabriel Fahrenheit invents the mercury-in-glass thermometer giving much greater precision (4 x that of Rømer). Using Rømer's zero point and an upper point of blood temperature, he adjusted the ...
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.
The parent of all mercury pressure gauges is the mercury barometer invented by Evangelista Torricelli in 1643. [15] An early engineering application of the mercury pressure gauge was to measure pressure in steam boilers during the age of steam. The first use on steam engines was by James Watt while developing the Watt steam engine between 1763 ...
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.