Subjects covered in this text are controlling the hydroelectric generator, generator excitation, basic principles of direct current generation, direction of current flow, basic alternating current generator, alternating and direct current voltage outputs, converting alternating current to direct current, review of the basic generator and commutation, generator components, eddy currents, classification of direct current generators, generator buildup, the series generator, the shunt generator, the compound generator, commutation, armature reaction, and review of direct current generators. Thirty figures supplement the text. Forty test questions and answers are included. (MS)