Abridgment of non-harmonic alternating currents

Certain principles are presented for solving non-harmonic a-c. problems. Graphical methods are already well known for solving practically any problem, when currents and electromotive forces are sinusoidal, by vector diagrams in a plane. In certain special cases such diagrams give correct results when currents and electromotive forces are non-sinusoidal, but in general diagrams in more than two dimensions are necessary. A wide range of material, some of which has been published before in scattered places, is brought into relation; no single general solution seems attainable. A Bibliography with 61 references is appended.