Kohlrausch, Friedrich Wilhelm Georg 1840-1910
German physicist

He was born in Rinteln, Niedersachen, the son of a well-known physicist, Rudolph Kohlrausch (1809-58), and held professorships of physics successively at the universities of G�ttingen (1866-70), Zurich (1870-71), Darmstadt (1871-75), W�rzburg (1875-88) and Strassburg (1888-95). In 1895 he succeeded Hermann von Helmholtz as president of the Physikalisch Technische Reichsanstalt in Charlottenburg, Berlin. Noted for his researches on magnetism and electricity, his most important contribution was his investigation of the conductivity of electrolytic solutions, which led to 'Kohlrausch's law' of independent ion migration. He published Leitfaden der praktischen Physik (1870), one of the first textbooks on physical laboratory methods, which was translated into English.