Source : Webster's Revised Unabridged Dictionary (1913)

Automixte system \Au`to*mixte" system\ (Mach.)
   A system (devised by Henri Pieper, a Belgian) of driving
   automobiles employing a gasoline engine and an auxiliary
   reversible dynamo. When there is an excess of power the
   dynamo is driven by the engine so as to charge a small
   storage battery; when there is a deficiency of power the
   dynamo reverses and acts as an auxiliary motor. Sometimes
   called {Pieper system}. -- {Automixte car}, etc.