Excerpt from Alternating Currents in Theory and Practice

Though there are numerous books dealing with the Principles of Alternating Currents, the writer has on many occasions, when recommending a text book to students, found a difficulty in selecting one which, while giving a sufficiently full account of the laws governing the flow of alternating currents in circuits, also includes an account of the several types of alternating current machines.

It is hoped that the present book will fill the gap, since, while the fundamental principles of the alternating current circuit are adequately considered, sufficient matter concerning machines and appliances is given to enable readers who have worked through the book to proceed at once to a specialised study of the particular machine or appliance in which they are more immediately interested.

Many students, in fact the majority, desire to take up the study of alternating currents with a very inadequate knowledge of mathematics. In view of this fact, which is to be greatly regretted and which constitutes one of the greatest difficulties of students and teachers alike, the calculus has not been used in the body of the book, it has, however, been used in a few footnotes, mainly with the idea of showing students what excellent examples of the use of elementary calculus are furnished by the subject under consideration.

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