Magnetic Force

Year Published: 1960

Description: Employs animation and live-action photography to show the development of man's knowledge of magnetic force, present-day concepts of the earth's magnetic field, and how the magnetic field is influenced in internal and external forces. Traces the historical development of man's knowledge of magnetism from the early Greeks through Oersted, Ampere, Faraday, to 1960, the present theories relative to the source of the earth's magnetic field and the techniques of measurement employed.