Electrical Engineering. An examination of these books reveals on the part of their authors a conception of the preferential scope of the subject which is at complete variance with my conception. Hence, beyond the similarity of title, there is nothing ln common between the present treatise and these others. I have omitted routine descriptive material as well as the elementary generalities regarding electricity and magnetism, and I have directed my efforts to an attempt to familiarize the reader with various considerations and calculations of which a sound knowledge should be acquired in order to enable him effectively to engage in practical electrical engineering work.