Leopold Pfaundler


Leopold Pfaundler von Hadermur (14 February 1839 – 6 May 1920) was an Austrian physicist and chemist born in Innsbruck. He was the father of pediatrician Meinhard von Pfaundler (1872-1947), and the father-in-law of pediatrician Theodor Escherich (1857-1911). He studied under chemist Heinrich Hlasiwetz (1825-1875) at Innsbruck, with Justus von Liebig (1803-1873) at the University of Munich, and with Henri Victor Regnault (1810-1878) and Charles Adolphe Wurtz (1817-1884) in Paris. In 1861 he received his doctorate, and in 1867 was appointed professor of physics at the University of Innsbruck. In 1891 he succeeded Ludwig Boltzmann (1844-1906) as professor of physics at the University of Graz. In 1887 he became a full member of the Vienna Academy of Sciences.Pfaundler, Leopold (1839-1920), Chemiker und Physiker
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Pfaundler is remembered today for his kinetic-molecular theory, kinetic-molecular explanation of gas reactions under the condition of equilibrium. He was the inventor of a number of scientific apparatuses — devices he often utilized in classroom demonstrations. These included a temperature regulation, temperature regulator (1863), a ''Stromkalorimeter'' (1869), a differential air thermometer (1875), a seismograph (1897) and a distance meter (1915), to name a few. He is also credited with creating a device for optical demonstration of Lissajous curve, Lissajous figures (1873). In 1863-64 he performed a survey of the Stubaier Alps with Ludwig Barth zu Barthenau (1839-1890), and in 1864 he was the first person to ascend to the summit of the ''Hofmannspitze'' (3112m).

Selected written works

* ''Die Physik des täglichen Lebens, gemeinverständlich dargestellt'' (1906). * ''Die physik des täglichen Lebens mit 467 Abbildungen'' (1913). * ''Ueber die Wärmekapazität des Wassers und eine Methode den Ort ihres Minimums zu messen'' (1915). * ''Ueber einen neuen Distanzmesser'' (1915). * ''Chronik der Familie Pfaundler von 1486 bis 1915'' (1915). * ''Die Innsbrucker Studenten-Kompagnie 1859 und 1866'' (1917). * ''Das chinesisch-japanische GO-Spiel: eine systematische Darstellung und Anleitung zum Spielen desselben''. He also published ''Müller-Pouillet's Lehrbuch der Physik und Meteorologie'' ("Johann Heinrich Jakob Müller–Claude Pouillet's textbook of physics and meteorology"), (9th edition, 1886–98, 3 volumes).
Worldcat Identities

Awards and honors

Pfaundler’s 1867 publication entitled “Beiträge zur chemischen Statik” [“A Contribution to Chemical Statics”] was a major contribution to the kinetic theory of chemical reactions. This publication was honored by a Citation for Chemical Breakthrough Award from the Division of History of Chemistry of the American Chemical Society presented to the University of Innsbruck in 2016.


{{DEFAULTSORT:Pfaundler, Leopold Austrian chemists 19th-century Austrian physicists 1839 births 1920 deaths University of Graz faculty University of Innsbruck faculty Scientists from Innsbruck