Jean-Pierre Christin (31 May 1683 – 19 January 1755) was a French physicist, mathematician, astronomer, and musician. His proposal in 1743 to reverse the Celsius thermometer scale (from water boiling at 0 degrees and ice melting at 100 degrees, to where zero represented the freezing point of water and 100 represented the boiling point of water) was widely accepted and is still in use today.[1][2][3]
Thermometer of Lyon in the Science Museum in London
Christin was born in Lyon. He was a founding member of the Académie des sciences, belles-lettres et arts de Lyon and served as its Permanent Secretary from 1713 until 1755. His thermometer was known in France before the Revolution as the thermometer of Lyon. One of these thermometers was kept at the Science Museum in London.[4]
The first thermometers used in Lyon were made according to the indications of René Antoine Ferchault de Réaumur, who created the alcohol thermometer in 1730 and applied a graduation divided into 80 parts between the melting point of water -0º- and the boiling point -80º-.
After experimenting, Christin considered that the mercury thermometer was preferable to the one with alcohol and pronounced in favor of its instrumentation in a conference on 13 June 1740. He noticed the idea of the centesimal division when, in his research, he observed that a quantity of mercury poured into a test tube, first condensed by the cold of crushed ice and then expanded by the heat of boiling water, moved its volume from 66 to 67 parts of the tube and represented them as 6600 and 6700 parts. By registering the mercury dilated in one hundred parts, he found it natural to divide the space traveled by one hundred hundredths, being that these new units, smaller than those of Réaumur, would be more in harmony with the sensations caused by the variations in temperature.
With this in mind, in 1743 he created the mercury-based "thermometer of Lyon" and with its new centigrade degree thermometer with 0 degrees to indicate the temperature at which the water reaches its point of fusion and 100 degrees where it reaches its boiling point.
Essays
Mémoire sur l'observation d'une éclipse de lune du 18 décembre, et sur quelques particularités relatives à ce phénomène (1732).
Instrument propre aux opérations de géométrie pratique et d'astronomie (1736).
Recherches sur les véritables dimensions du pied de roi et du pied de ville (1736).
Lettre sur l'usage de la jauge de Lyon (1736).
Parallèle des diverses méthodes de calcul pour mesurer le cercle (1736).
Démonstration de divers problèmes de géométrie (1737).
Méthode pour tracer une méridienne par les hauteurs du soleil (1740).
Observations sur les baromètres de différents genres (1740).
Fixation de la latitude ou élévation du pôle de Lyon (1745).
Remarque sur la chaleur naturelle du corps humain, observée par le moyen du thermomètre de Lyon (1747).
Sur la chaleur directe du soleil, observée par le même instrument (1747).
Sur la chaleur des eaux minérales de Baréges (1748).
Expériences sur l'incubation artificielle des œufs de poule, par le moyen de certains degrés de chaleur (1750).
Expériences sur les aimants naturels et artificiels de diverses grandeurs (1750).
François Casati, Le thermomètre de Lyon, Lyon, Editions lyonnaises d'art et d'histoire, 1992
References
^Arthur Sigurssen (10 May 2003). . Newsfinder e-magazine. Archived from the original on 6 December 2012. Retrieved 3 July 2012.
^. DiracDelta.co.uk science and engineering encyclopedia. Archived from the original on 10 June 2012. Retrieved 3 July 2012.
^Henry Carrington Bolton (1800): Evolution of the thermometer 1592–1743. The Chemical pub. co., Easton, Pennsylvania. pp. 85–91.
^. Science Museum. Archived from the original on 1 June 2013. Retrieved 3 July 2012.
External links
March 01, 2023
jean, pierre, christin, 1683, january, 1755, french, physicist, mathematician, astronomer, musician, proposal, 1743, reverse, celsius, thermometer, scale, from, water, boiling, degrees, melting, degrees, where, zero, represented, freezing, point, water, repres. Jean Pierre Christin 31 May 1683 19 January 1755 was a French physicist mathematician astronomer and musician His proposal in 1743 to reverse the Celsius thermometer scale from water boiling at 0 degrees and ice melting at 100 degrees to where zero represented the freezing point of water and 100 represented the boiling point of water was widely accepted and is still in use today 1 2 3 Thermometer of Lyon in the Science Museum in London Christin was born in Lyon He was a founding member of the Academie des sciences belles lettres et arts de Lyon and served as its Permanent Secretary from 1713 until 1755 His thermometer was known in France before the Revolution as the thermometer of Lyon One of these thermometers was kept at the Science Museum in London 4 Contents 1 Thermometer of Lyon 2 Essays 3 Bibliography 4 References 5 External linksThermometer of Lyon EditThe first thermometers used in Lyon were made according to the indications of Rene Antoine Ferchault de Reaumur who created the alcohol thermometer in 1730 and applied a graduation divided into 80 parts between the melting point of water 0º and the boiling point 80º After experimenting Christin considered that the mercury thermometer was preferable to the one with alcohol and pronounced in favor of its instrumentation in a conference on 13 June 1740 He noticed the idea of the centesimal division when in his research he observed that a quantity of mercury poured into a test tube first condensed by the cold of crushed ice and then expanded by the heat of boiling water moved its volume from 66 to 67 parts of the tube and represented them as 6600 and 6700 parts By registering the mercury dilated in one hundred parts he found it natural to divide the space traveled by one hundred hundredths being that these new units smaller than those of Reaumur would be more in harmony with the sensations caused by the variations in temperature With this in mind in 1743 he created the mercury based thermometer of Lyon and with its new centigrade degree thermometer with 0 degrees to indicate the temperature at which the water reaches its point of fusion and 100 degrees where it reaches its boiling point Essays EditMemoire sur l observation d une eclipse de lune du 18 decembre et sur quelques particularites relatives a ce phenomene 1732 Instrument propre aux operations de geometrie pratique et d astronomie 1736 Recherches sur les veritables dimensions du pied de roi et du pied de ville 1736 Lettre sur l usage de la jauge de Lyon 1736 Parallele des diverses methodes de calcul pour mesurer le cercle 1736 Demonstration de divers problemes de geometrie 1737 Methode pour tracer une meridienne par les hauteurs du soleil 1740 Observations sur les barometres de differents genres 1740 Fixation de la latitude ou elevation du pole de Lyon 1745 Remarque sur la chaleur naturelle du corps humain observee par le moyen du thermometre de Lyon 1747 Sur la chaleur directe du soleil observee par le meme instrument 1747 Sur la chaleur des eaux minerales de Bareges 1748 Experiences sur l incubation artificielle des œufs de poule par le moyen de certains degres de chaleur 1750 Experiences sur les aimants naturels et artificiels de diverses grandeurs 1750 Sur l hygrometre 1750 Bibliography EditJoseph Jean Baptiste Xavier Fournet Sur l invention du thermometre centigrade a mercure faite a Lyon par M Christin 1845 Francois Casati Le thermometre de Lyon Lyon Editions lyonnaises d art et d histoire 1992References Edit Arthur Sigurssen 10 May 2003 History of the Thermometer Newsfinder e magazine Archived from the original on 6 December 2012 Retrieved 3 July 2012 Celsius Temperature Scale DiracDelta co uk science and engineering encyclopedia Archived from the original on 10 June 2012 Retrieved 3 July 2012 Henry Carrington Bolton 1800 Evolution of the thermometer 1592 1743 The Chemical pub co Easton Pennsylvania pp 85 91 Mercury in glass thermometer 1743 1799 Science Museum Archived from the original on 1 June 2013 Retrieved 3 July 2012 External links EditAcademie de Sciencies Belles Lettres et Arts de Lyon Retrieved from https en wikipedia org w index php title Jean Pierre Christin amp oldid 1088740807, wikipedia, wiki, book, books, library,
