A textbook for a two-semester beginning graduate course for students who have completed a standard undergraduate program for physics majors. Emphasizes the unity of electric and magnetic phenomena both in their physical basis and the mode of their mathematical description, develops and utilizes a number of tools in mathematical physics, and presents now material on the interaction of relativistic charged particles with electromagnetic fields and other areas. First published in 1962, and again in 1974; the third edition incorporates the slight drifts in emphasis and application the long-established subject has taken over the past couple of decades. Annotation c. by Book News, Inc., Portland, Or.