**Oskar Emil Meyer** (15 October 1834, Varel – 21 April 1909, Breslau) was a German physicist best known for his studies on the viscosity of gases. He was a younger brother to chemist Lothar von Meyer.

## Biography

From 1854 he studied sciences at the universities of Heidelberg, Zurich and Königsberg, where he was a student of Franz Ernst Neumann. In 1860 he received his doctorate with a dissertation on the friction between two liquids, titled *De mutua duorum fluidorum frictione*. In 1864 he succeeded Rudolf Lipschitz as an associate professor at the University of Breslau — teaching classes in mathematics and mathematical physics. During the following year he became a full professor at Breslau, and in 1867 succeeded Moritz Ludwig Frankenheim as director of the Physics Cabinet.

## Published works

In 1899 his influential *Die kinetische Theorie der Gase. In elementarer Darstellung mit mathematischen Zusätzen* was translated into English and published with the title "The kinetic theory of gases; elementary treatise with mathematical appendices". His other noteworthy written efforts are:

*Ueber die Reibung der Flüssigkeiten. Nachtrag*, 1863 – On the friction of liquids.*Vorlesungen über die Theorie der Elasticität der festen Körper und des Lichtäthers*, 1885 (by Franz Ernst Neumann, edited by Meyer) – Lectures on the theory of elasticity of solid bodies and luminiferous aether.*Die Bestimmung der inneren Reibung nach Coulomb's Verfahren*, 1887 – On the definition of internal friction according to Coulomb's method.*Gebirgsmagnetismus*, 1889 – Geomagnetism.