Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. In compiling this work it has been the endeavor to-provide a ready reference on the subject of magneto ignition as applied to automotive engines. The rapid expansion of the practical application of electricity for the purpose of ignition renders it difficult to give a concise description oi all details involved, consequently this work treats principally on the most efficient type of ignition, namely, the magneto.