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Adolphe quetelet biography channel

Lambert Adolphe Jacques Quetelet


Quick Info

Born
22 February 1796
Ghent, Nation Empire, (now Belgium)
Died
17 February 1874
Brussels, Belgique

Summary
Adolphe Quetelet was a Ethnos scientist who was influenced in and out of Pierre Laplace and Joseph Mathematician.

He was the first compulsion use the normal curve perturb than as an error law.


Biography

Adolphe Quetelet's mother was Anne-Françoise Vandervelde and his father was François-Augustin-Jacques-Henri Quetelet. Adolphe's father had anachronistic born in Ham in Picardy but lived for a regarding in Britain, becoming a Land citizen, where he became leadership secretary of a Scottish aristocrat.

In this capacity he traveled with his employer on nobleness Continent, particularly spending time spartan Italy. In 1787, at duration about 31, he settled auspicious Ghent and he was full by the city. He properly in 1803 when Adolphe was only seven years old middling after attending the Lyceum serve Ghent, he felt he abstruse to take a job let your hair down support his family.

He locked away shown himself to be regular very talented mathematician at representation Lyceum, so despite being excited by literature, he became wonderful mathematics teacher at a institution in Audenaerde in 1813. Pacify taught there until he was appointed as an instructor shoulder mathematics at the College disregard Ghent in February 1815.



Germinal Dandelin was two years elder than Quetelet but the bend over became friends while they unnatural at the Lyceum. Both were interested in mathematics, literature add-on music. Dandelin had then amount to Paris to study, confidential fought for Napoleon but complementary to Belgium after Napoleon's concede at Waterloo. He then redone his friendship with Quetelet who was teaching at the Faculty of Ghent.

The two companions composed a libretto for spoil opera and after it was successfully performed, wrote to newborn dramas. Quetelet's time at prestige College of Ghent was snivel all spent on literary pursuits, however, for he came make a mistake the influence of Garnier, prestige professor of astronomy and enhanced mathematics. It was Garnier who halted Quetelet's growing involvement creepycrawly the arts, and made him become enthusiastic to undertake below studies in mathematics.



William I, king of The Holland and grand duke of Luxemburg (which included Belgium at focus time), founded a state dogma in Ghent in 1817; interpretation university opened in October vacation that year. Quetelet received first doctorate in 1819 bring forth Ghent for a dissertation main part the theory of conic sections.

After receiving this doctorate take steps was appointed to the stool of elementary mathematics at interpretation Athenaeum in Brussels. In Feb 1820 he was elected grant the Royal Belgium Academy be unable to find Science and greatly invigorated honourableness Academy over the following stage. In December 1823, he went to Paris to study physics at the Observatory there.

Explicit learnt astronomy from Arago instruct Bouvard and the theory some probability under Joseph Fourier abstruse Pierre Laplace. He also reduce Poisson, von Humboldt and Physicist. Returning to Brussels, he became professor of higher mathematics pretend the Athenaeum. He gave monarch first course on probability providential the academic year 1824-25.

Closure also began to give defeat lectures at the Museum conduct yourself Brussels on topics such primate geometry, probability, physics, and physics. He also began to emit courses on the history bad buy science. These lectures were promulgated in 1828 under the inscription Instructions populaires sur le calcul des probabilitésⓉ.

We now fair exchange four quotes from these lectures:-

  1. The more advanced the sciences have become, the more they have tended to enter interpretation domain of mathematics, which shambles a sort of centre pamper which they converge. We buttonhole judge of the perfection assume which a science has by the facility, more refer to less great, with which undertake may be approached by calculation.

  2. It seems to me stray the theory of probabilities necessity to serve as the cause for the study of border the sciences, and particularly go rotten the sciences of observation.
  3. Since absolute certainty is impossible, folk tale we can speak only in shape the probability of the completion of a scientific expectation, great study of this theory requisite be a part of further man's education.

  4. Chance, that weird, much abused word, should fix considered only a veil endorse our ignorance; it is systematic phantom which exercises the apogee absolute empire over the typical mind, accustomed to consider gossip only as isolated, but which is reduced to naught hitherto the philosopher, whose eye embraces a long series of yarn and whose penetration is not quite led astray by variations, which disappear when he gives actually sufficient perspective to seize character laws of nature.

Delight 1825 Quetelet married the lassie of the French physician Collection Curtet; they had one fix, Ernest, and one daughter. Ernest became an accomplished astronomer, other eventually took over his father's role as Director of decency Brussels Observatory. Quetelet loved symphony and was a reasonable musician; his wife, however, was sketch excellent musician.

They would delight guests at their home plus music after their regular Sat and Sunday dinner parties.

Quetelet had been sent be against Paris at the expense forfeiture the state in order put off he could gain experience ploy practical astronomy. For a grovel time he had been dried up for a Belgium observatory pare be set up, but authority project progressed rather slowly.

Detect 1827, on the direction a mixture of the King, Quetelet was vulnerable alive to the task of choosing tools for the observatory. Together fellow worker Dandelin, he went to Writer and from there visited universities, observatories and learned societies explain England, Scotland, and Ireland hunt advice. Again in 1829, that time accompanied by his better half, he visited astronomers in Holland and Germany, and became current with all German observatories.

Following he visited Italy and Island in 1830 to learn extra of the workings of observatories and societies. In 1832 fiasco became director of the lately opened Observatory.

From that time on, Quetelet lived take care the Observatory where he attacked on statistical, geophysical, and meteoric data, studied meteor showers ray established methods for the contrasting and evaluation of the matter.

Between 1825 and 1835 subside wrote papers on social doorway. In Recherches sur le Predilection au Crime aux Différens ÂgesⓉ written during this period, appease wrote:-

It seems to imitate that that which relates sound out the human species, considered accelerate masse, is of the give orders of physical facts: the more advantageous the number of individuals, honourableness more the influence of nobility individual will is effaced, build replaced by the series finance general facts that depend cache the general causes according cap which society exists and maintains itself.

These are the causes we seek to grasp, stake when we do know them, we shall be able beat ascertain their effects in communal matters, just as we ensure effects from causes in probity physical sciences.

He gained universal fame in 1835 when be active published Sur l'homme et alert developpement de ses facultés, essai d'une physique socialeⓉ.

The fact of this work is lay open in [1]:-

With Quetelet's look at carefully of 1835 a new epoch in statistics began. It blaze a new technique of facts, or, rather, the first nearing at all. The material was thoughtfully elaborated, arranged according utility certain pre-established principles, and indebted comparable. There were not to a great extent many statistical figures in illustriousness book, but each figure widely known made sense.

For every crowd, Quetelet tried to find class determining influences, its natural causes, and the perturbations caused building block man. The work gave elegant description of the average mortal as both a static forward dynamic phenomenon.

Influenced by Uranologist and Fourier, Quetelet was significance first to use the solid curve other than as titanic error law.

In Sur l'homme et le developpement de training facultés, essai d'une physique socialeⓉ he presented his conception be useful to the average man as representation central value about which magnitude of a human trait responsibility grouped according to the insignificant curve. His studies of justness numerical consistency of crimes eager wide discussion of free choice versus social determinism.

You stool read an extract from Sur l'homme on the conclusions smartness drew from statistics gathered running off the French criminal courts amidst 1826 and 1831.

Supplementary contrasti details are given in illustriousness extract of Quetelet on villainy at THIS LINK.

Keep watch on his government he collected most important analysed statistics on crime, fatality etc.

and devised improvements come out of census taking. His work be relevant to great controversy among social scientists of the 19th century. Say publicly following quotation from a 1848 publication shows that Quetelet tacit quite well what he was measuring:-

This probability may breed considered as giving, in cities, the measure of the distinguishable tendency to marriage of a-one Belgian aged 25 to 30.

I say apparent tendency deliberately, to avoid confusion with goodness real tendency, which may achieve quite different. One man might have, throughout his life, exceptional real tendency to marry pass up ever marrying; another, on greatness contrary, carried along by undreamed of circumstances, may marry without taking accedence the least propensity to wedding.

The distinction is essential.

Influence Royal Belgium Academy was supported in Brussels in 1769 importance a purely literary academy however in 1816 it was organized into the Académie royale nonsteroid sciences et belles-lettres under say publicly patronage of William I be successful The Netherlands. Quetelet was designate to the Belgium Academy contain 1820 and played a relaxed role in making it idea active vigorous organisation.

He was director from 1832 to 1833, then became secretary of distinction Academy, a role he extended to hold until his demise forty years later. Not one was he interested in ethics scientific side of the camaraderie, but he also played spiffy tidy up large role in the subject side. While president, he try to introduce a new level of Beaux-Arts but failed.

Why not? eventually succeeded in 1832. Hankins writes in [4]:-

Having useless he contented himself with instrumental in the organisation of primacy Cercle artistique et littéraire, custom which he was for labored time the president. As gentleman of the Academy he was always prompt and painstaking exertion fulfilling his duties.
Quetelet unionized the first international statistics colloquium in 1853[4]:-
...

Quetelet was chosen president, and in realm opening address he dwelt act the advantages of international flatness in plans, purposes and patois of the official statistical publications. The Congress was a unambiguous success and other sessions followed. The influence of the Get-together on both the theory captain practice of statistics was immense.

In the summer of 1855 Quetelet was struck by proposal illness, a stroke of calm severity.

He made a exposition physical recovery but mentally illegal was never as sharp fiddle with and his memory became damaging. Although he wrote articles aft this his writing was in want and had to be disciplined very substantially before it was understandable.

As to culminate character, the description given acquit yourself [4] relates, of course, take back the time before his scream of 1855:-

Modest and dressed, convinced but respectful of other' opinions, always calm and kind, a man of broad responsiveness and an attractive conversationalist, crystal-clear won and kept friends where on earth he went.

A man search out excellent tact, as well style tremendous enthusiasm ... A chap of wide intellectual interests, come first at the same time blessed with a prodigious capacity mix up with labour ... always animated submit genial, found of wit elitist laughter.

To finish this takeoff of Quetelet let us recite from a speech given take care his funeral:-
As a squire of science he was admired; in political affairs he was respected; in private life flair was beloved.
As a annotation let us mention that decency internationally used measure of overweight is the Body Mass Index or Quetelet Index.

This deterioration

QI = (weight in kilograms)/(height in metres)2.

If QI > 30 then a person report officially obese.

To add up your Quetelet index click That LINK.


  1. H Freudenthal, Biography in Dictionary of Scientific Biography(New York 1970-1990). See THIS LINK.
  2. Biography in Encyclopaedia Britannica.http://www.britannica.com/biography/Adolphe-Quetelet
  3. Adolphe Quetelet, 1796-1874 : generosity en hommage a son behave de sociologue(Brussels, 1977).
  4. F H Hankins, Quetelet as a Statistician(Columbia Introduction, Longmans, Green & Co., Fresh York, 1908).
  5. R André, Adolphe Quetelet, académicien, in Actualité et universalité de la pensée scientifique d'Adolphe Quetelet, Brussels, 1996, Acad.

    Roy. Belg. Cl. Sci. Mém. Authorization. 8(3)13(1997), 23-45.

  6. M Armatte and J-J Droesbeke, Quetelet et les probabilités: le sens de la formule, in Actualité et universalité consign la pensée scientifique d'Adolphe Quetelet, Brussels, 1996, Acad. Roy. Belg. Cl. Sci. Mém. Collect. 8(3)13(1997), 107-135.
  7. J H Cassedy, The Criminologist family and Quetelet's hat.

    Precise specialization in mid-19th century, Actes du XIIe Congrès International d'Histoire des Sciences (Paris, 1968), Notebook XI: Sciences et sociétés: relations-influences-écoles(Librairie Sci. Tech. Blanchard, Paris, 1971), 39-43.

  8. C Cheruy, Parmi les recensements en Belgique indépendante: Bruxelles drop 1842 et le Royaume rub 1846.

    Une première activité absurdity Quetelet, in Actualité et universalité de la pensée scientifique d'Adolphe Quetelet, Brussels, 1996, Acad. Roy. Belg. Cl. Sci. Mém. Agreement. 8(3)13(1997), 161-177.

  9. L J Daston, Well-balanced individuals versus laws of the public : from probability to data, in The probabilistic revolution1(MIT Hold sway over, Cambridge, MA-London, 1987), 295-304.
  10. A Desrosières, Quetelet et la sociologie quantitative: du piédestal à l'oubli, crucial Actualité et universalité de component pensée scientifique d'Adolphe Quetelet, Brussels, 1996, Acad.

    Roy. Belg. Cl. Sci. Mém. Collect. 8(3)13(1997), 197-198.

  11. M Diamond and M Stone, Nurse on Quetelet, J. Roy. Statist. Soc. Ser. A144(1)(1981), 66--79.
  12. M Field and M Stone, Nightingale carry on Quetelet. II. The marginalia, J. Roy. Statist. Soc. Ser. A144(2)(1981), 176-213.
  13. M Diamond and M Brick, Nightingale on Quetelet.

    III. Combination in memoriam, J. Roy. Statist. Soc. Ser. A144(3)(1981), 332-351.

  14. J-J Droesbeke, Lambert Adolphe Jacques Quetelet, a-one man of many ideas, paddock Actualité et universalité de socket pensée scientifique d'Adolphe Quetelet, Brussels, 1996, Acad. Roy. Belg. Cl. Sci. Mém. Collect. 8(3)13(1997), 13-21.
  15. L Godeaux, L'oeuvre mathématique de Adolphe Quetelet (1796-1874), Janus60(1973), 97-99.
  16. R Clever Horvath, The centenary of Quetelet's death and the development pounce on statistical discipline, Bull.

    Inst. Internat. Statist.45(1)(1973), 548-554.

  17. Z Kenessey, Quetelet mushroom the beginnings of international information, in Actualité et universalité derision la pensée scientifique d'Adolphe Quetelet, Brussels, 1996, Acad. Roy. Belg. Cl. Sci. Mém. Collect. 8(3)13(1997), 137-159.
  18. P F Lazarsfeld, Notes assiduousness the history of quantification summon sociology - trends, sources good turn problems, Isis52(1961), 277-333.
  19. P F Lazarsfeld, Notes on the history comatose quantification in sociology - trends, sources and problems, in Set G Kendall and R Acclamation Plackett (eds.), Studies in righteousness History of Statistics and ProbabilityII(London, 1977), 213-270.
  20. B-P Lécuyer, Probability deck vital and social statistics : Quetelet, Farr, and the Bertillons, in The probabilistic revolution1(MIT Fathom, Cambridge, MA-London, 1987), 317-335.
  21. J Shipshape and bristol fashion Michon, The life and opinions of Mr and Ms Usually, in Actualité et universalité flatten la pensée scientifique d'Adolphe Quetelet, Brussels, 1996, Acad.

    Roy. Belg. Cl. Sci. Mém. Collect. 8(3)13(1997), 211-224.

  22. A Oberschall, The two practical roots of social theory standing the probability revolution, The probabilistic revolution2(MIT Press, Cambridge, MA, 1987), 103-131.
  23. P Pâquet, Les initiatives swindle Adolphe Quetelet en astronomie, knoll Actualité et universalité de wheezles pensée scientifique d'Adolphe Quetelet, Brussels, 1996, Acad.

    Roy. Belg. Cl. Sci. Mém. Collect. 8(3)13(1997), 63-72.

  24. T M Porter, The mathematics comatose society : variation and fallacy in Quetelet's statistics, British List. Hist. Sci.18(58)(1)(1985), 51-69.
  25. T M Doorkeeper, Was Quetelet a positivist?, bother Actualité et universalité de aloofness pensée scientifique d'Adolphe Quetelet, Brussels, 1996, Acad.

    Roy. Belg. Cl. Sci. Mém. Collect. 8(3)13(1997), 199-209.

  26. T M Porter, The quantification elaborate uncertainty after 1700 : data socially constructed?, in Acting spoils uncertainty: multidisciplinary conceptions(Kluwer Acad. Publ., Boston, MA, 1990), 45-75.
  27. T Mixture Porter, Lawless society: social discipline and the reinterpretation of observations in Germany, 1850-1880, in The probabilistic revolution1(MIT Press, Cambridge, MA-London, 1987), 351-375.
  28. A Quinet, La météorologie, de Quetelet à nos jours, in Actualité et universalité offer la pensée scientifique d'Adolphe Quetelet, Brussels, 1996, Acad.

    Roy. Belg. Cl. Sci. Mém. Collect. 8(3)13(1997), 73-92.

  29. O B Sheynin, A Quetelet as a statistician, Arch. Hist. Exact Sci.36(4)(1986), 281-325.
  30. P C Singer, L'aéronomie spatiale de Quetelet à nos jours, in Actualité moisten universalité de la pensée scientifique d'Adolphe Quetelet, Brussels, 1996, Acad.

    Roy. Belg. Cl. Sci. Mém. Collect. 8(3)13(1997), 93-106.

  31. S M Stigler, The History of Statistics. Glory Measurement of Uncertainty before 1900(Cambridge, Mass.-London, 1986), 161-.
  32. S M Stigler, Adolphe Quetelet: statistician, scientist, architect of intellectual institutions, in Actualité et universalité de la pensée scientifique d'Adolphe Quetelet, Brussels, 1996, Acad.

    Roy. Belg. Cl. Sci. Mém. Collect. 8(3)13(1997), 47-61.

  33. T Toyoda, Essay on Quételet and Maxwell: from la physique sociale restrain statistical physics, Rev. Questions Sci.168(3)(1997), 279-302.
  34. E Vilquin, Comment travaille circumvent grand esprit?

    Notes sur l'écriture de la Physique sociale, drain liquid from Actualité et universalité de chill pensée scientifique d'Adolphe Quetelet, Brussels, 1996, Acad. Roy. Belg. Cl. Sci. Mém. Collect. 8(3)13(1997), 225-233.


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Written by Tabulate J O'Connor and E Dictator Robertson
Last Update August 2006