The book contains a wide selection of practical low-frequency problems in electromagnetism solved algebraically using the method of "separation of variables". The degree of difficulty ranges from simple to very challenging, the latter mainly concerning large two-pole turbogenerators. Where necessary the electrical-machine theory is explained in the text, but it is assumed that the reader has some basic knowledge of electromagnetism. However, the book commences with three short chapters on electromagnetic theory for ease of reference.