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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. [2] Fortin barometer
Fortin barometer. The mercury barometer's design gives rise to the expression of atmospheric pressure in inches or millimeters of mercury (mmHg). A torr was originally defined as 1 mmHg. The pressure is quoted as the level of the mercury's height in the vertical column.
The clock is designed to enable the timepiece to run indefinitely and overwinding is prevented by a safety mechanism. The prime mover, encased in a finely detailed clock body, is a Fortin mercury barometer. The barometer contained 68 kilograms (150 pounds) of mercury (approximately 5 litres). [2]
Weather stations typically have these following instruments: . Thermometer for measuring air and sea surface temperature; Barometer for measuring atmospheric pressure; Hygrometer for measuring humidity
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 ...
1643 — Evangelista Torricelli invents the mercury barometer; 1654 — Ferdinando II de' Medici, Grand Duke of Tuscany, made sealed tubes part filled with alcohol, with a bulb and stem, the first modern-style thermometer, depending on the expansion of a liquid, and independent of air pressure [2]
Marc-Aurèle Fortin (1888–1970), Québécois painter; Robert-Émile Fortin (1945–2004), Québécois painter; Politicians: André-Gilles Fortin (1943–1977), Social Credit Party member of the Canadian House of Commons; Dean Fortin (born 1959), Canadian mayor of Victoria; Émile Fortin (1878–1936), Conservative member of the Canadian House ...
The 17th century saw the development of the barometer and the Galileo thermometer while the 18th century saw the development of the thermometer with the Fahrenheit and Celsius scales. The 20th century developed new remote sensing tools, such as weather radars, weather satellites and wind profilers, which provide better sampling both regionally ...