German physiologist and educator. Born Berlin, November 7th, 1818, in 1836 he entered the University of Berlin, where his teacher was Johannes Müller. In 1840 he became the latter's assistant in physiology. His great work was the study of animal electricity, and his famous book was Researches on Animal Electricity, 1848-84. For many years he exerted great influence as a teacher. In 1858, upon the death of Müller, he was appointed to the latter's chair in physiology. In 1851 he had been admitted to the Academy of Sciences in Berlin; in 1867 he became its permanent secretary. His closest friend after Muller's death was von Helmholtz, who also had been a student of Muller. DuBois-Reymond died in Berlin on November 26, 1896. Rudolf Steiner makes many references to his work in lectures and writings.