“ OHM, ōm, Georg Simon (1787-1854) . A German physicist and discoverer of the famous law in electricity bearing his name. He was born and educated at Erlangen, and, after giving instruction in mathematics and physics in a number of schools, he was called in 1817 to a chair in the gymnasium at Cologne. He made a study of the laws of galvanic currents, and while investigating the relative conductivity of metals finally discovered the relation known as ‘Ohm's law,’ which underlies all electrical theory and measurement. ”